#Java - Code Snippets for '#Java.util'

#Java - Code Snippets for '#Java.util' - 85 code snippet(s) found

Sample 1. Get all elements greater than 2, sort them and then push them to a new set, using Lambda Expression

// Declare and Initialize the Collection



Set<Integer> intSet = new HashSet<Integer>();



// Add Elements



intSet.add(1);

intSet.add(2);

intSet.add(3);

intSet.add(4);



// Set the predicate or the condition for filtering the elements.



Predicate<Integer> moreThan2Pred = (p) -> (p > 1); 



// Use Filter to refine the element set, sort to Sort and Collectors.toSet to get a set out of Stream.



intSet =  intSet.stream().filter(moreThan2Pred).sorted().collect(Collectors.toSet());

    

System.out.println(intSet); // Prints [2, 3, 4]

_{Like Feedback lambda expression collections set hashset generics stream predicate filter sort java.util.hashset java.util.stream.Collectors}

Sample 2. Combine two Summaries and Generate a new Summary using Lambda Expression

// Populate a List using Set elements.



// Declare and Initialize the Collection



Set<Integer> intSet = new HashSet<Integer>();

Set<Integer> intSet2 = new HashSet<Integer>(); 



// Add Elements



intSet.add(1);

intSet.add(2);

intSet.add(3);

intSet.add(4);

intSet2.add(1);

intSet2.add(2);

intSet2.add(3);

intSet2.add(4); 



// Use the stream and collectors to Summarize all Integer elements 



IntSummaryStatistics summary = intSet.stream().collect(Collectors.summarizingInt(p->((Integer)p)));

 

summary.combine(intSet2.stream().collect(Collectors.summarizingInt(p->((Integer)p))));

 

System.out.println(summary); // Prints IntSummaryStatistics{count=8, sum=20, min=1, average=2.500000, max=4}

_{Like Feedback lambda expression collections set hashset generics stream collectors Collectors.summarizingInt summary.combine java.util.hashset java.util.stream.Collectors java.util.IntSummaryStatistics}

Sample 3. Generate Random Number till 100

Random rand = new Random();

int randomNumber = rand.nextInt(100);

_{Like Feedback Random Number Generation Random}

Sample 4. Blogger API for creating Posts ( Change xxxxxx to your blog specific info )

package Reader;



import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;



import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.client.methods.HttpRequestBase;

import org.apache.http.entity.StringEntity;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.util.EntityUtils;



import com.squareup.okhttp.MediaType;

import com.squareup.okhttp.OkHttpClient;



public class BlogPostCreater {

      

   public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");



   OkHttpClient client = new OkHttpClient();

    

   String post(String title, String content,String label,String authorization_key) throws IOException {

      

      content = content.replace(""",""");

      

      

      String url = "https://www.googleapis.com/blogger/v3/blogs/xxxxxxxxxx/posts?clientId=xxxxxxxx&clientSecret=xxxxxxxx";



      HttpClient client = new DefaultHttpClient();

      HttpPost post = new HttpPost(url);



      // add header

      post.setHeader("Authorization", authorization_key);

      post.setHeader("Content-type","application/json");

      

      post.setEntity(new StringEntity(buildJson(title,content,label)));

       

      HttpResponse response = client.execute(post);

            

      System.out.println(response);

      

      return "true";

    }

   

      



     String buildJson(String title, String content,String label) {

       

        System.out.println(label);

        return "{"status": "LIVE", "content": ""+content+"", "kind": "blogger#post"" +

             ", "title": ""+title+"", "url": "xxxxxx", " +

             ""readerComments": "DONT_ALLOW_HIDE_EXISTING", "author": {" +

             ""url": "https://www.blogger.com/profile/04326686331881561093", " +

             ""image": {" +

             ""url": "//lh4.googleusercontent.com/-64Ucx9lX9Q4/AAAAAAAAAAI/AAAAAAAAAx0/-rUjBgS3djE/s35-c/photo.jpg"" +

             "}, " +

             ""displayName": "Vivek Vermani", " +

             ""id": "g108356395081185480077"" +

             "}, "updated": "2015-09-28T09:46:12+05:30", "replies": {"totalItems": "0", " +

             ""selfLink": "https://www.googleapis.com/blogger/v3/blogs/xxxxxxxxxx/posts/2495464003469367152/comments"" +

             "}, "blog": {"id": "4275342475651800664"}, " +

             ""etag": "'GtyIIQmNmmUjEA0nwhSqMElCJ1g/dGltZXN0YW1wOiAxNDQzNDEzNzcyMDc1Cm9mZnNldDogMTk4MDAwMDAK'", " +

             ""published": "2015-09-28T09:46:00+05:30", " +

             ""id": "2495464003469367152", " +

             ""selfLink": "https://www.googleapis.com/blogger/v3/blogs/xxxxxx/posts/2495464003469367152"}";

     }

     

     public String post(String url, Map<String,String> formParameters) throws ClientProtocolException, IOException { 

        HttpPost request = new HttpPost(url);

          

        List <NameValuePair> nvps = new ArrayList <NameValuePair>();

         

        for (String key : formParameters.keySet()) {

         nvps.add(new BasicNameValuePair(key, formParameters.get(key))); 

        }

       

        request.setEntity(new UrlEncodedFormEntity(nvps));

         

        return execute(request);

       }



   // makes request and checks response code for 200

     private String execute(HttpRequestBase request) throws ClientProtocolException, IOException {

      HttpClient httpClient = new DefaultHttpClient();

      HttpResponse response = httpClient.execute(request);

          

      HttpEntity entity = response.getEntity();

         String body = EntityUtils.toString(entity);

     

      if (response.getStatusLine().getStatusCode() != 200) {

       throw new RuntimeException("Expected 200 but got " + response.getStatusLine().getStatusCode() + ", with body " + body);

      }

     

         return body;

     }

     

     

}

_{Like Feedback blogger api blogger api for post creation java.lang.RuntimeException}

Sample 5. Write a Program for Graph Breadth First Traversal using Apache Commons MultiMap

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashSet;

import java.util.Map;

import java.util.Set;



import com.google.common.collect.ArrayListMultimap;

import com.google.common.collect.Multimap;



public class Graph {

   private static Multimap<Integer,Integer> adjacentDirectedNodesMap = ArrayListMultimap.create();

   private static Set<Integer> alreadyVisited = new HashSet();

   

   static{

      adjacentDirectedNodesMap.put(1, 2);

      adjacentDirectedNodesMap.put(1, 3);

      adjacentDirectedNodesMap.put(1, 5);

      adjacentDirectedNodesMap.put(2, 4);

      adjacentDirectedNodesMap.put(4, 5);

   }

   

   public static void main(String[] args){

      ArrayList visited = new ArrayList();

      

      Integer startNode = 1;

      

      displayAdjacentNodes(startNode);

      

   }

   

   private static void displayAdjacentNodes(Integer integer){

      System.out.println(integer);

      for(Map.Entry<Integer, Collection<Integer>> adjacentNodes: adjacentDirectedNodesMap.asMap().entrySet()){

         for(Integer integer1:adjacentNodes.getValue()){

            if(alreadyVisited.contains(integer1)){

               continue;

            }

            alreadyVisited.add(integer1);

            System.out.println(integer1);

         }

      }

   }

   

}

_{Like Feedback graph traversal breadth first traversal}

Sample 6. Code to find email ids in a string using Pattern.

String text="vivek boy goy vivek@tech.com viv@ek.com sdjs@adjk";

Pattern regex = Pattern.compile("[@]");

Matcher regexMatcher = regex.matcher(text);

int i =0;

int width = 0;

while (regexMatcher.find()) {

     if((regexMatcher.start()-10 > 0) && (regexMatcher.end()+10 < text.length())){

          width=10;

       String[]    substr=text.substring(regexMatcher.start()-width,regexMatcher.end()+width).split(" ");

           for(int j=0;j<substr.length;j++){

                   if(substr[j].contains("@") && (substr[j].contains(".com") ||    substr[j].contains(".net"))){

                                System.out.println(substr[j]);

                           }                

                     }

               } else {

               width=0;

        }

 }

_{Like Feedback regex pattern string regexMatcher.find java.util.regex.Matcher java.util.regex.Pattern}

Sample 7. Enum with a method to get the constant having specific member element.

public enum JavaFramework {

   SPRING("Spring","Web"),

   STRUTS("Struts","Web"),

   JSF("JSF","View"),

   CRUNCH("Apache Crunch","BigData");

   

        

   public String name;

   public String type;



   JavaFramework(String name, String type){

      this.name = name;

      this.type = type;

   }

   

   static public List<JavaFramework> getByType(String type)  {

      List<JavaFramework> frameworks = new ArrayList();

      for(JavaFramework framework: JavaFramework.values()){

         if(framework.type.equalsIgnoreCase(type)){

            frameworks.add(framework);

         }

      }

      

      return frameworks;

   }

}

_{Like Feedback enum java.util.list}

Sample 8. Scheduling task using java.util.timer

static {

   timer.schedule(new ScheduledTask(), 60000, 60000);

}



private static class Schedule extends TimerTask {

    @Override public void run() {

      //doSomething();

    }

}

_{Like Feedback java.util.timer java.util.TimerTask scheduling task java.lang Override}

Sample 9. Convert Time in milliseconds to Days

TimeUnit.DAYS.convert(timeinMs, TimeUnit.MILLISECONDS)

_{Like Feedback convert time in ms to days TimeUnit java.util.concurrent.TimeUnit}

Sample 10. Usage of LinkedHashMap



Map<String,String> linkedhashmap = new LinkedHashMap();

linkedhashmap.put("United States", "Washington");

linkedhashmap.put("Canada", "Ottawa");

linkedhashmap.put("Canada", "Ottawa");

linkedhashmap.put("South Africa", "Pretoria");

linkedhashmap.put("South Africa", "Cape Town");

linkedhashmap.put("South Africa", "Bloemfontein");



System.out.println(linkedhashmap); // Duplicates not allowed as it's a Map, Insertion Order as its linked Map

_{Like Feedback LinkedHashMap Map HashMap java.util collections framework}

Sample 11. Code Sample / Example / Snippet of java.util.zip.DeflaterOutputStream

    private byte[] deflate(byte[] b) throws IOException {

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        DeflaterOutputStream dos = new DeflaterOutputStream(baos);

        dos.write(b);

        dos.close();

        return baos.toByteArray();

    }

_{Like Feedback java.util.zip.DeflaterOutputStream}

Sample 12. Code Sample / Example / Snippet of java.util.zip.GZIPInputStream

  private static CSVReader openCsv(File file) throws IOException {

    final Reader fileReader;

    if (file.getName().endsWith(".gz")) {

      final GZIPInputStream inputStream =

          new GZIPInputStream(new FileInputStream(file));

      fileReader = new InputStreamReader(inputStream);

    } else {

      fileReader = new FileReader(file);

    }

    return new CSVReader(fileReader);

  }

_{Like Feedback java.util.zip.GZIPInputStream}

Sample 13. Code Sample / Example / Snippet of java.util.Properties

    public Connection createConnection() throws SQLException {

      final Properties info = new Properties();

      for (Map.Entry<String, String> entry : map.entrySet()) {

        info.setProperty(entry.getKey(), entry.getValue());

      }

      Connection connection =

          DriverManager.getConnection("jdbc:calcite:", info);

      for (ConnectionPostProcessor postProcessor : postProcessors) {

        connection = postProcessor.apply(connection);

      }

      return connection;

    }

_{Like Feedback java.util.Properties}

Sample 14. Code Sample / Example / Snippet of java.util.jar.JarOutputStream

    private File createBundle(String symbolicName, String version) throws IOException {

        File tmpFile = File.createTempFile("tmpbundle-", "jar");

        tmpFile.deleteOnExit();

        Manifest manifest = new Manifest();

        manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");

        if (symbolicName != null) {

            manifest.getMainAttributes().putValue(Constants.BUNDLE_SYMBOLICNAME, symbolicName);

        }

        if (version != null) {

            manifest.getMainAttributes().putValue(Constants.BUNDLE_VERSION, version);

        }

        JarOutputStream target = new JarOutputStream(new FileOutputStream(tmpFile), manifest);

        target.close();

        return tmpFile;

    }

_{Like Feedback java.util.jar.JarOutputStream}

Sample 15. Write a Program for Graph Depth First Traversal using Apache Commons MultiMap

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashSet;

import java.util.Set;



import com.google.common.collect.ArrayListMultimap;

import com.google.common.collect.Multimap;



public class Graph {

   private static Multimap<Integer,Integer> adjacentDirectedNodesMap = ArrayListMultimap.create();

   private static Set<Integer> alreadyVisited = new HashSet();

   

   static{

      adjacentDirectedNodesMap.put(1, 2);

      adjacentDirectedNodesMap.put(1, 3);

      adjacentDirectedNodesMap.put(1, 5);

      adjacentDirectedNodesMap.put(2, 4);

      adjacentDirectedNodesMap.put(4, 5);

   }

   

   public static void main(String[] args){

      ArrayList visited = new ArrayList();

      

      Integer startNode = 1;

      

      displayAdjacentNodes(startNode);

      

   }

   

   private static void displayAdjacentNodes(Integer integer){

      if(alreadyVisited.contains(integer)){

         return;

      }

      alreadyVisited.add(integer);

      System.out.println(integer);

      for(Integer adjacentNodes: adjacentDirectedNodesMap.get(integer)){

         displayAdjacentNodes(adjacentNodes);

      }

   }

   

}

_{Like Feedback graph traversal depth first algorithm}

Sample 16. Java Code to get all images url from html code.

regex = Pattern.compile("[http]");

regexMatcher = regex.matcher(htmlParseData.getHtml());

List tr=htmlParseData.getOutgoingUrls();                       

imgUrlCounter=0;

for(i=0;i<tr.size();i++){

          if(tr.get(i).toString().contains(".jpg") || tr.get(i).toString().contains(".jpeg") || tr.get(i).toString().contains(".gif") || tr.get(i).toString().contains(".bmp")){

                   url = new URL(tr.get(i).toString());  

                   Image image = new ImageIcon(url).getImage();

           }

 }

_{Like Feedback regex pattern regex.matcher html java.util.regex.pattern regular expressions}

Sample 17. Usage of HashMap

Map<Integer,String> indexedInfo = new HashMap();

indexedInfo.put(1,"Spain");

indexedInfo.put(2,"Denmark");

indexedInfo.put(3,"China");

_{Like Feedback hashmap map collections java.util.hashmap}

Sample 18. Sort a List using Collections.sort and comparator

Collections.sort(listClassInfo,new Comparator<ClassInfoBean>(){

            public int compare(ClassInfoBean s1,ClassInfoBean s2){

                  if(s1.name.compareTo(s2.name) < 0){

                     return -1;

                  } else {

                     return 1;

                  }

                  

}});

_{Like Feedback sorting sort Collections.sort sort a list comparator compare method java.util.Collections}

Sample 19. ArrayList of Optional Integers

List<Optional<Integer>> intList = new ArrayList<Optional<Integer>>();



// Add Elements



intList.add(Optional.empty());

intList.add(Optional.of(2));

intList.add(Optional.of(3));

intList.add(Optional.of(4));

_{Like Feedback optional java 8 list arraylist list of optional integers arraylist of optional java.util.Optional}

Sample 20. Get current time using GregorianCalendar

Calendar calendar = new GregorianCalendar();

float currentTime = calendar.get( Calendar.HOUR_OF_DAY ) + ((float)calendar.get( Calendar.MINUTE )/100);

_{Like Feedback GregorianCalendar Calendar.HOUR_OF_DAY Calendar.MINUTE Calendar.java.util.Calendar}

Sample 21. LinkedList of optional Integers

List<Optional<Integer>> intList = new LinkedList<Optional<Integer>> ();



// Add Elements



intList.add(Optional.empty());

intList.add(Optional.of(2));

intList.add(Optional.of(3));

intList.add(Optional.of(4));

_{Like Feedback}

Sample 22. Initialize java.util.date using java.util.Calendar

Date currentDate = Calendar.getInstance().getTime();

_{Like Feedback calendar java.util.calendar java.util date java.util.date Calendar.getTime}

Sample 23. Initialize list using google guava Lists

import java.util.List;

import com.google.common.collect.Lists;



class GoogleListsTest{

   public static void main(String[] args){

      List list = Lists.newArrayList();

   }

}

_{Like Feedback list google guava Lists Lists.newArrayList com.google.common.collect.Lists}

Sample 24. Write a Program for coin changer application. The program should set the cash box with available currency and then should render the exact change. If enough cash is not available , it should present the appropriate message.

import java.util.Map;

import java.util.Map.Entry;

import java.util.TreeMap;





public class CoinChanger {



   enum Currency {

      DOLLAR(1),QUARTER(.25),DIME(.10),NICKEL(.05),PENNY(.01);



      private double currencyValue;



      Currency(double value){

         currencyValue = value;

      }



      double getCurrencyValue(){

         return this.currencyValue;

      }

   }



   private static Map<Currency, Integer> cashBox;

   private static Map<Currency, Integer> change;



   static {

      cashBox = new TreeMap<Currency, Integer>();

      change = new TreeMap<Currency, Integer>();

      initializeCashBox();

   }







   public static void main(String[] args) {

        double amountToReturn = 18.79f; // Set the amount to be changed here



        for(Entry<Currency, Integer> entry:cashBox.entrySet()){

           Currency currency = (Currency)entry.getKey();

           int coinCount = (int)(amountToReturn/(entry.getKey().getCurrencyValue()));

           int availableCurrency = (int)(entry.getValue());



           if(coinCount > availableCurrency){

              coinCount = availableCurrency;

           }



           change.put(currency, coinCount);

           if(coinCount > 0){

              amountToReturn = amountToReturn - (coinCount * entry.getKey().getCurrencyValue());

           }

        }



        System.out.println(change);



        if(amountToReturn > .1){

           System.out.println("Not enough cash");

        }

   }



   private static void initializeCashBox(){

      //set the cash box

      cashBox.put(Currency.DOLLAR, 50);

      cashBox.put(Currency.QUARTER, 0);

      cashBox.put(Currency.DIME, 50);

      cashBox.put(Currency.NICKEL, 50);

      cashBox.put(Currency.PENNY, 50);



   }

}

_{Like Feedback coin changer application coin changer app}

Sample 25. Method to get Date after n days using Calendar

Date getDateAfterDays(int numberOfDays){

   Calendar futureDate = Calendar.getInstance();    

   futureDate.setTime(new Date()); // Set Current Date

   futureDate.add(Calendar.DATE, numberOfDays); // Add n days to current Date



   return new Date(futureDate.getTimeInMillis());

}

_{Like Feedback date calendar java.util calendar.add calendar.date calendar.settime calendar.gettimeinmillis}

Sample 26. Get Date and Time after few Hours

Date getDateTimeAfterNHours(int numberOfHours){

   Calendar futureTime = Calendar.getInstance();    

   futureTime.setTime(new Date()); // Set Current Date

   futureTime.add(Calendar.HOUR, numberOfDays); // Add n hours to current Date and Time



   return new Date(futureTime.getTimeInMillis());

}

_{Like Feedback date calendar java.util calendar.add calendar.hour calendar.settime calendar.gettimeinmillis}

Sample 27. Time Taken to call a method or service

Date date1 = new Date();

       

// Call Service or Method

       

Date date2 = new Date();       

       System.out.println(TimeUnit.SECONDS.convert(date2.getTime()-date1.getTime(), TimeUnit.MILLISECONDS));// Time Taken in Seconds

       System.out.println(TimeUnit.MINUTES.convert(date2.getTime()-date1.getTime(), TimeUnit.MILLISECONDS));// Time Taken in Minutes

       System.out.println(TimeUnit.HOURS.convert(date2.getTime()-date1.getTime(), TimeUnit.MILLISECONDS));// Time Taken in Hours

_{Like Feedback Difference between 2 dates Time to call a method TimeUnit Date.java.util.Date}

Sample 28. Spring AMQP ( messaging-rabbitmq ) - Register the listener and send a message

https://spring.io/guides/gs/messaging-rabbitmq/

_{Like Feedback}

Sample 29. RabbitMQ message receiver

import java.util.concurrent.CountDownLatch;



public class Receiver {



   private CountDownLatch latch = new CountDownLatch(1);



   public void receiveMessage(String message) {

      latch.countDown();

   }



   public CountDownLatch getLatch() {

      return latch;

   }



}

_{Like Feedback Spring AMQP Rabbit MQ RabbitMQ}

Sample 30. Apache Kafka Producer

https://apache.googlesource.com/kafka/+/trunk/examples/src/main/java/kafka/examples/Producer.java

_{Like Feedback}

Sample 31. Implementation of NamespaceContext

import java.util.Iterator;



import javax.xml.XMLConstants;

import javax.xml.namespace.NamespaceContext;



// Map prefixes to Namespace URIs

public class APINameSpaceContext implements NamespaceContext 

{

   static final String WEB_NAMESPACE =  "http://schemas.microsoft.com/LiveSearch/2008/04/XML/web";

   static final String API_NAMESPACE = "http://schemas.microsoft.com/LiveSearch/2008/04/XML/element";

   static final String SPELL_NAMESPACE = "http://schemas.microsoft.com/LiveSearch/2008/04/XML/spell";

   static final String RS_NAMESPACE = "http://schemas.microsoft.com/LiveSearch/2008/04/XML/relatedsearch";

   static final String PB_NAMESPACE = "http://schemas.microsoft.com/LiveSearch/2008/04/XML/phonebook";

   static final String MM_NAMESPACE = "http://schemas.microsoft.com/LiveSearch/2008/04/XML/multimedia";

   static final String AD_NAMESPACE = "http://schemas.microsoft.com/LiveSearch/2008/04/XML/ads";

   static final String IA_NAMESPACE = "http://schemas.microsoft.com/LiveSearch/2008/04/XML/instantanswer";

   static final String NEWS_NAMESPACE = "http://schemas.microsoft.com/LiveSearch/2008/04/XML/news";

   static final String ENCARTA_NAMESPACE = "http://schemas.microsoft.com/LiveSearch/2008/04/XML/encarta";



   public String getNamespaceURI(String prefix) 

   {

      if (prefix == null) throw new NullPointerException("Null prefix");

      else if ("api".equals(prefix)) return API_NAMESPACE;

      else if ("web".equals(prefix)) return WEB_NAMESPACE;

      return XMLConstants.NULL_NS_URI;

   }

   

   // This method isn't necessary for XPath processing.

   public String getPrefix(String uri) 

   {

      throw new UnsupportedOperationException();

   }

   

   public Iterator getPrefixes(String arg0) 

   {

      throw new UnsupportedOperationException();

   }

}

_{Like Feedback NamespaceContext}

Sample 32. Apache Hadoop Map Reduce Example

https://apache.googlesource.com/hadoop-common/+/trunk/hadoop-mapreduce-project/hadoop-mapreduce-examples/src/main/java/org/apache/hadoop/examples/Grep.java

_{Like Feedback}

Sample 33. Apache Hadoop Multi File Word Count

https://apache.googlesource.com/hadoop-common/+/trunk/hadoop-mapreduce-project/hadoop-mapreduce-examples/src/main/java/org/apache/hadoop/examples/MultiFileWordCount.java

_{Like Feedback}

Sample 34. Usage of org.apache.abdera.model.Entry;

Entry entry = factory.newEntry();

entry.setId(FOMHelper.generateUuid());

entry.setUpdated(new java.util.Date());

entry.addAuthor("James");

entry.setTitle("Posting to Roller");

entry.setContentAsHtml("<p>This is an example post to Roller</p>");

AbderaClient abderaClient = new AbderaClient(abdera);

abderaClient.addCredentials(start, null, null, new UsernamePasswordCredentials("username", "password"));

Document<Service> service_doc = abderaClient.get(start).getDocument();

Service service = service_doc.getRoot();

Collection collection = service.getWorkspaces().get(0).getCollections().get(0);

String uri = collection.getHref().toString();

Response response = abderaClient.post(uri, entry);

_{Like Feedback}

Sample 35. Internal Implementation of ArrayList#removeIf

@Override

    public boolean removeIf(Predicate<? super E> filter) {

        Objects.requireNonNull(filter);

 

        int removeCount = 0;

        final BitSet removeSet = new BitSet(size);

        final int expectedModCount = modCount;

        final int size = this.size;

        for (int i=0; modCount == expectedModCount && i < size; i++) {

            @SuppressWarnings("unchecked")

            final E element = (E) elementData[i];

            if (filter.test(element)) {

                removeSet.set(i);

                removeCount++;

            }

        }

        if (modCount != expectedModCount) {

            throw new ConcurrentModificationException();

        }



        // shift surviving elements left over the spaces left by removed elements

        final boolean anyToRemove = removeCount > 0;

        if (anyToRemove) {

            final int newSize = size - removeCount;

            for (int i=0, j=0; (i < size) && (j < newSize); i++, j++) {

                i = removeSet.nextClearBit(i);

                elementData[j] = elementData[i];

            }

            for (int k=newSize; k < size; k++) {

                elementData[k] = null;  // Let gc do its work

            }

            this.size = newSize;

            if (modCount != expectedModCount) {

                throw new ConcurrentModificationException();

            }

            modCount++;

        }



        return anyToRemove;

    }

_{Like Feedback Internal Implementation of ArrayList#removeIf java.util.function.Predicate java.util.Objects java.util.Objects java.util.ConcurrentModificationException.ConcurrentModificationException}

Sample 36. Internal Implementation of BufferedReader#lines

public Stream<String> lines() {

        Iterator<String> iter = new Iterator<String>() {

            String nextLine = null;



            @Override

            public boolean hasNext() {

                if (nextLine != null) {

                    return true;

                } else {

                    try {

                        nextLine = readLine();

                        return (nextLine != null);

                    } catch (IOException e) {

                        throw new UncheckedIOException(e);

                    }

                }

            }



            @Override

            public String next() {

                if (nextLine != null || hasNext()) {

                    String line = nextLine;

                    nextLine = null;

                    return line;

                } else {

                    throw new NoSuchElementException();

                }

            }

        };

        return StreamSupport.stream(Spliterators.spliteratorUnknownSize(

                iter, Spliterator.ORDERED | Spliterator.NONNULL), false);

    }

_{Like Feedback Internal Implementation of BufferedReader#lines}

Sample 37. Usage of org.joda.time.DateMidnight

DateMidnight currentDate = new DateMidnight();

DateMidnight dateafterAMonth = currentDate.plusMonths(1);

Date javaSedateAfterAMonth = dateafterAMonth.toDate();

_{Like Feedback org.joda.time.DateMidnight java.util.Date Date Add month to Date}

Sample 38. Check whether a reference of AbstractCollection holds a List,Queue or Set

public static void main(String[] args)  {

        

        AbstractCollection collection = new ArrayList();

        

        if(collection instanceof AbstractList){

           System.out.println("This is a list");

        }

        

        if(collection instanceof AbstractQueue){

           System.out.println("This is a Queue");

        }

        

        if(collection instanceof AbstractSet){

           System.out.println("This is a Set");

        }

          

}

_{Like Feedback instaceOf AbstractCollection}

Sample 39. Clear Map entries after expiration time using Apache commons PassiveExpiringMap

PassiveExpiringMap<String,String> cache = new PassiveExpiringMap<String,String>(1,TimeUnit.SECONDS); // Expiration time of 1 sec

cache.put("Key1", "Value1");

System.out.println(cache.containsKey("Key1")); // prints true

Thread.sleep(1000);

System.out.println(cache.containsKey("Key1")); // prints false

_{Like Feedback Clear Map entries after expiration PassiveExpiringMap map apache commons TimeUnit.SECONDS Thread.sleep}

Sample 40. Make a map readonly using Apache Commons UnmodifiableMap

Map<String,String> map = new HashMap();

map.put("Key1", "Value1");



Map<String,String> unmodifiableMap = UnmodifiableMap.unmodifiableMap(map);

        

unmodifiableMap.put("Key2", "Value2"); // throws java.lang.UnsupportedOperationException

_{Like Feedback readonly map apache commons}

Sample 41. Usage of TreeMap

Map<String,String> treemap = new TreeMap();

treemap.put("United States", "Washington");

treemap.put("Canada", "Ottawa");

treemap.put("Canada", "Ottawa");

treemap.put("South Africa", "Pretoria");

treemap.put("South Africa", "Cape Town");

treemap.put("South Africa", "Bloemfontein");



System.out.println(treemap); // Duplicate Not allowed as it's a Map, Ordered by Keys as it's a TreeMap

_{Like Feedback TreeMap Map java.util}

Sample 42. Usage of ConcurrentSkipListMap

Map<String,String> map = new ConcurrentSkipListMap();

map.put("United States", "Washington");

map.put("Canada", "Ottawa");

map.put("Canada", "Ottawa");

map.put("South Africa", "Pretoria");

map.put("South Africa", "Cape Town");

map.put("South Africa", "Bloemfontein");



System.out.println(map); // Prints {Canada=Ottawa, South Africa=Bloemfontein, United States=Washington}

        

// Duplicates not allowed as it's a Map, Sorted as par natural order of keys for faster and concurrent operations.

_{Like Feedback map ConcurrentSkipListMap concurrent access map}

Sample 43. Usage of EnumMap

Map<Country,String> map = new HashMap();

map.put(Country.US, "Washington");

map.put(Country.CANADA, "Ottawa");

map.put(Country.CANADA, "Ottawa");

map.put(Country.SOUTH_AFRICA, "Pretoria");

map.put(Country.SOUTH_AFRICA, "Cape Town");

map.put(Country.SOUTH_AFRICA, "Bloemfontein");



Map<String,String> enumMap = new EnumMap(map); // Prints {CANADA=Ottawa, US=Washington, SOUTH_AFRICA=Bloemfontein}



System.out.println(enumMap); // Duplicates not allowed as it's a Map, Sorted as per order of Enum Declarations

_{Like Feedback EnumMap Collections framework Map Map with enum keys}

Sample 44. Get the Date object using the TimeZone

TimeZone zone = (TimeZone.getDefault().getRawOffset() == EET.getRawOffset() ? EST : EET);

Date expectedZone = createCalendar(zone, 20051231, 0).getTime();

_{Like Feedback TimeZone java.util.TimeZone Date Calendar}

Sample 45. Usage of java.text.NumberFormat

NumberFormat formatter = null;

if (locale != null) {

formatter = NumberFormat.getNumberInstance(locale);

} else {

formatter = NumberFormat.getNumberInstance(Locale.getDefault());

}

_{Like Feedback NumberFormat Locale}

Sample 46. Usage of Java Collections Stack

Stack<INodeDirectory> directories = new Stack<INodeDirectory>();

for(directories.push((INodeDirectory)inode); !directories.isEmpty(); ) {

   INodeDirectory d = directories.pop();

}

_{Like Feedback stack collections java.util}

Sample 47. Usage of java.util.concurrent.Future

long bytesLastMoved = bytesMoved.get();

Future<?>[] futures = new Future<?>[sources.size()];

int i=0;

for (Source source : sources) {

   futures[i++] = dispatcherExecutor.submit(source.new BlockMoveDispatcher());

}



for (Future<?> future : futures) {

   try {

      future.get();

   } catch (ExecutionException e) {

      LOG.warn("Dispatcher thread failed", e.getCause());

   }

}

_{Like Feedback}

Sample 48. Code Sample / Example / Snippet of java.util.StringTokenizer

  public static List<String> getNamedOutputsList(JobConf conf) {

    List<String> names = new ArrayList<String>();

    StringTokenizer st = new StringTokenizer(conf.get(NAMED_OUTPUTS, ""), " ");

    while (st.hasMoreTokens()) {

      names.add(st.nextToken());

    }

    return names;

  }

_{Like Feedback java.util.StringTokenizer}

Sample 49. Code Sample / Example / Snippet of java.util.Calendar

    public static double year()

    {

      Calendar cal = Calendar.getInstance();

      return cal.get(Calendar.YEAR);

    }

_{Like Feedback java.util.Calendar}

Sample 50. Code Sample / Example / Snippet of java.util.EventListener

    private void readObject(ObjectInputStream s)

        throws IOException, ClassNotFoundException {

        listenerList = NULL_ARRAY;

        s.defaultReadObject();

        Object listenerTypeOrNull;



        while (null != (listenerTypeOrNull = s.readObject())) {

            ClassLoader cl = Thread.currentThread().getContextClassLoader();

            EventListener l = (EventListener)s.readObject();

            String name = (String) listenerTypeOrNull;

            ReflectUtil.checkPackageAccess(name);

            add((Class<EventListener>)Class.forName(name, true, cl), l);

        }

    }

_{Like Feedback java.util.EventListener}

Sample 51. Concatenate two Streams

public static IntStream concat(IntStream a, IntStream b) {

        Objects.requireNonNull(a);

        Objects.requireNonNull(b);



        Spliterator.OfInt split = new Streams.ConcatSpliterator.OfInt(

                a.spliterator(), b.spliterator());

        IntStream stream = StreamSupport.intStream(split, a.isParallel() || b.isParallel());

        return stream.onClose(Streams.composedClose(a, b));

    }

_{Like Feedback Concatenate two Streams java 8 java8}

Sample 52. Code Sample / Example / Snippet of java.util.Map

  public Schema create(SchemaPlus parentSchema, String name,

      Map<String, Object> operand) {

    Map map = (Map) operand;

    String host = (String) map.get("host");

    String database = (String) map.get("database");

    return new MongoSchema(host, database);

  }

_{Like Feedback java.util.Map}

Sample 53. Code Sample / Example / Snippet of java.util.Random

  public Enumerable<Object[]> scan(DataContext root) {

    final Random random = seed >= 0 ? new Random(seed) : new Random();

    final Maze maze = new Maze(width, height);

    final PrintWriter pw = new PrintWriter(System.out);

    maze.layout(random, pw);

    if (Maze.DEBUG) {

      maze.print(pw, true);

    }

    return new AbstractEnumerable<Object[]>() {

      public Enumerator<Object[]> enumerator() {

        final Set<Integer> solutionSet;

        if (solution) {

          solutionSet = maze.solve(0, 0);

        } else {

          solutionSet = null;

        }

        return Linq4j.transform(maze.enumerator(solutionSet),

            new Function1<String, Object[]>() {

              public Object[] apply(String s) {

                return new Object[] {s};

              }

            });

      }

    };

  }

_{Like Feedback java.util.Random}

Sample 54. Code Sample / Example / Snippet of java.util.TimeZone

  private static final FastDateFormat TIME_FORMAT_TIMESTAMP;



  static {

    TimeZone gmt = TimeZone.getTimeZone("GMT");

    TIME_FORMAT_DATE = FastDateFormat.getInstance("yyyy-MM-dd", gmt);

    TIME_FORMAT_TIME = FastDateFormat.getInstance("HH:mm:ss", gmt);

    TIME_FORMAT_TIMESTAMP =

        FastDateFormat.getInstance("yyyy-MM-dd HH:mm:ss", gmt);

  }

_{Like Feedback java.util.TimeZone}

Sample 55. Code Sample / Example / Snippet of java.util.Calendar

  private SparkHandlerImpl() {

    classServer = new HttpServer(CLASS_DIR);



    classServer.start();

    System.setProperty("spark.repl.class.uri", classServer.uri());



    final Calendar calendar = Calendar.getInstance();

    classId = new AtomicInteger(

        calendar.get(Calendar.HOUR_OF_DAY) * 10000

        + calendar.get(Calendar.MINUTE) * 100

        + calendar.get(Calendar.SECOND));

  }

_{Like Feedback java.util.Calendar}

Sample 56. Code Sample / Example / Snippet of java.util.regex.Matcher

    private void defineVariables(String line) {

      Matcher varDefn = matchesVarDefn.matcher(line);

      if (varDefn.lookingAt()) {

        String var = varDefn.group(1);

        String val = varDefn.group(2);

        vars.define(var, val);

      } else {

        String[] words = splitWords.split(line);

        for (String var : words) {

          String value = System.getenv(var);

          vars.define(var, value);

        }

      }

    }

_{Like Feedback java.util.regex.Matcher}

Sample 57. Code Sample / Example / Snippet of java.util.StringTokenizer

    private List<String> tokenize(String s) {

      List<String> result = new ArrayList<>();

      StringTokenizer tokenizer = new StringTokenizer(s);

      while (tokenizer.hasMoreTokens()) {

        result.add(tokenizer.nextToken());

      }

      return result;

    }

_{Like Feedback java.util.StringTokenizer}

Sample 58. Code Sample / Example / Snippet of java.util.Collection

      public Void apply(ResultSet resultSet) {

        ++executeCount;

        try {

          final Collection result =

              CalciteAssert.toStringList(resultSet,

                  ordered ? new ArrayList<String>() : new TreeSet<String>());

          if (executeCount == 1) {

            expected = result;

          } else {

            if (!expected.equals(result)) {

              assertThat(newlineList(result), equalTo(newlineList(expected)));

              fail("oops");

            }

          }

          return null;

        } catch (SQLException e) {

          throw new RuntimeException(e);

        }

      }

_{Like Feedback java.util.Collection}

Sample 59. Code Sample / Example / Snippet of java.util.BitSet

    public static BitSet INIT_BITSET(final int ... b) {

        final BitSet bitset = new BitSet();

        for (final int aB : b) {

            bitset.set(aB);

        }

        return bitset;

    }

_{Like Feedback java.util.BitSet}

Sample 60. Code Sample / Example / Snippet of java.util.List

    private static List convertArrayToList(Object array)

    {

        int len = Array.getLength(array);

        List list = new ArrayList(len);

        for (int i = 0; i < len; i++)

        {

            list.add(Array.get(array, i));

        }

        return list;

    }

_{Like Feedback java.util.List}

Sample 61. Code Sample / Example / Snippet of java.util.regex.Pattern

    private long getStoreId(File storeFile) {

        Pattern p = Pattern.compile(m_name + "-(\d+)");

        Matcher m = p.matcher(storeFile.getName());

        if (m.find()) {

            return Long.parseLong(m.group(1));

        }

        throw new RuntimeException("Invalid store file name: " + storeFile.getName());

    }

_{Like Feedback java.util.regex.Pattern}

Sample 62. Code Sample / Example / Snippet of java.util.concurrent.ScheduledExecutorService

    public void postEvent(final String topic, Map<String, String> payload) {

        final Map<String, String> eventPayload = new HashMap<>(payload);

        for (final EventListener listener : m_listeners) {

            ScheduledExecutorService executor = getExecutorService();

            if (executor.isShutdown()) {

                logWarning("Cannot post event, executor is shut down!");

                return;

            }

            executor.submit(new Runnable() {

                @Override

                public void run() {

                    try {

                        listener.handle(topic, eventPayload);

                    }

                    catch (Exception e) {

                        logWarning("Exception while posting event", e);

                    }

                }

            });

        }

    }

_{Like Feedback java.util.concurrent.ScheduledExecutorService}

Sample 63. Code Sample / Example / Snippet of java.util.concurrent.locks.Lock

    public int getDeploymentVersionLimit() {

        Lock lock = m_lock.readLock();

        lock.lock();

        try {

            return m_deploymentVersionLimit;

        }

        finally {

            lock.unlock();

        }

    }

_{Like Feedback java.util.concurrent.locks.Lock}

Sample 64. Code Sample / Example / Snippet of java.util.Iterator

    public void validateRangeIterators() {

        SortedRangeSet srs1 = new SortedRangeSet("1-10");

        Iterator i1 = srs1.rangeIterator();

        assert i1.hasNext() : "We should have one Range instance in our iterator.";

        assert ((Range) i1.next()).toRepresentation().equals("1-10");

        assert !i1.hasNext() : "There should be only one instance in our iterator.";

        SortedRangeSet srs2 = new SortedRangeSet("1-5,8,10-15");

        Iterator i2 = srs2.rangeIterator();

        assert i2.hasNext() && i2.next() instanceof Range

            && i2.hasNext() && i2.next() instanceof Range

            && i2.hasNext() && i2.next() instanceof Range

            && !i2.hasNext() : "There should be exactly three Range instances in our iterator.";

        SortedRangeSet srs3 = new SortedRangeSet("");

        assert !srs3.iterator().hasNext() : "Iterator should be empty.";

    }

_{Like Feedback java.util.Iterator}

Sample 65. Code Sample / Example / Snippet of java.util.Set

    public Set getExtendList() {

        Set set = new HashSet();

        for (Iterator i = requirements.iterator(); i.hasNext();) {

            RequirementImpl impl = (RequirementImpl) i.next();

            if (impl.isExtend())

                set.add(impl);

        }

        return set;

    }

_{Like Feedback java.util.Set}

Sample 66. Code Sample / Example / Snippet of java.util.Random

    private File createRandomFileWithContent() throws IOException {

        OutputStream fileOut = null;

        File file = null;

        try {

            file = FileUtils.createTempFile(null);

            fileOut = new FileOutputStream(file);

            byte[] byteArray = new byte[12345];

            Random randomContentCreator = new Random();

            randomContentCreator.nextBytes(byteArray);

            fileOut.write(byteArray);



            return file;

        }

        finally {

            try {

                if (fileOut != null) {

                    fileOut.close();

                }

            }

            catch (IOException e) {

                throw e;

            }

        }

    }

_{Like Feedback java.util.Random}

Sample 67. Code Sample / Example / Snippet of java.util.StringTokenizer

	public LowestID(String representation) {

        try {

            StringTokenizer st = new StringTokenizer(representation, ",");

            m_targetID = Codec.decode(st.nextToken());

            m_storeID = Long.parseLong(st.nextToken());

            m_lowestID = Long.parseLong(st.nextToken());

        }

        catch (NoSuchElementException e) {

            throw new IllegalArgumentException("Could not create lowest ID object from: " + representation);

        }

	}

_{Like Feedback java.util.StringTokenizer}

Sample 68. Code Sample / Example / Snippet of java.util.concurrent.CountDownLatch

    public void testTooLongTask() throws Exception {

        final CountDownLatch latch = new CountDownLatch(5);

        

        Executer executer = new Executer(new Runnable() {

            public void run() {

                try {

                    Thread.sleep(20);

                    latch.countDown();

                }

                catch (InterruptedException e) {

                    e.printStackTrace();

                }

            }

        });

        executer.start(10);

        assert latch.await(1, TimeUnit.SECONDS);

    }

_{Like Feedback java.util.concurrent.CountDownLatch}

Sample 69. Code Sample / Example / Snippet of java.util.Calendar

    private static Calendar getToday() {

        Calendar cal = Calendar.getInstance();

        cal.set(Calendar.HOUR_OF_DAY, 12);

        cal.set(Calendar.MINUTE, 0);

        cal.set(Calendar.SECOND, 0);

        cal.set(Calendar.MILLISECOND, 0);

        return cal;

    }

_{Like Feedback java.util.Calendar}

Sample 70. Code Sample / Example / Snippet of java.util.concurrent.Semaphore

    private void removeRepository(String instanceName) throws IOException, InterruptedException, InvalidSyntaxException {

        Configuration[] configs = listConfigurations("(factory.instance.pid=" + instanceName + ")");

        if ((configs != null) && (configs.length > 0)) {

            final Semaphore sem = new Semaphore(0);

            ServiceTracker<Object, Object> tracker = new ServiceTracker<Object, Object>(m_bundleContext, m_bundleContext.createFilter("(factory.instance.pid=" + instanceName + ")"), null) {

                @Override

                public void removedService(ServiceReference<Object> reference, Object service) {

                    super.removedService(reference, service);

                    sem.release();

                }

            };

            tracker.open();



            try {

                configs[0].delete();



                if (!sem.tryAcquire(1, TimeUnit.SECONDS)) {

                    throw new IOException("Instance did not get removed in time.");

                }

            }

            finally {

                tracker.close();

            }

        }

    }

_{Like Feedback java.util.concurrent.Semaphore}

Sample 71. Code Sample / Example / Snippet of java.util.jar.Manifest

    public InputStream getDeploymentPackage(String id, String version) throws OverloadedException, IOException {

        List<ArtifactData> data = m_provider.getBundleData(id, version);

        Manifest manifest = new Manifest();

        Attributes main = manifest.getMainAttributes();



        main.putValue("Manifest-Version", "1.0");

        main.putValue("DeploymentPackage-SymbolicName", id);

        main.putValue("DeploymentPackage-Version", version);



        for (ArtifactData bd : data) {

            manifest.getEntries().put(bd.getFilename(), bd.getManifestAttributes(false));

        }



        return DeploymentPackageStream.createStreamForThread(m_connectionFactory, manifest, data.iterator(), false);

    }

_{Like Feedback java.util.jar.Manifest}

Sample 72. Code Sample / Example / Snippet of java.util.jar.Attributes

    public InputStream getDeploymentPackage(String id, String version) throws OverloadedException, IOException {

        List<ArtifactData> data = m_provider.getBundleData(id, version);

        Manifest manifest = new Manifest();

        Attributes main = manifest.getMainAttributes();



        main.putValue("Manifest-Version", "1.0");

        main.putValue("DeploymentPackage-SymbolicName", id);

        main.putValue("DeploymentPackage-Version", version);



        for (ArtifactData bd : data) {

            manifest.getEntries().put(bd.getFilename(), bd.getManifestAttributes(false));

        }



        return DeploymentPackageStream.createStreamForThread(m_connectionFactory, manifest, data.iterator(), false);

    }

_{Like Feedback java.util.jar.Attributes}

Sample 73. Code Sample / Example / Snippet of java.util.Properties

    public void init(BundleContext context, DependencyManager manager) throws Exception {

        manager.add(createComponent()

            .setInterface(Servlet.class.getName(), null)

            .setImplementation(DeploymentServlet.class)

            .add(createConfigurationDependency().setPropagate(true).setPid(DEPLOYMENT_PID))

            .add(createServiceDependency().setService(StreamGenerator.class).setRequired(true))

            .add(createServiceDependency().setService(DeploymentProvider.class).setRequired(true))

            .add(createServiceDependency().setService(DeploymentProcessor.class).setRequired(false).setCallbacks("addProcessor", "removeProcessor"))

            .add(createServiceDependency().setService(LogService.class).setRequired(false))

        );

        manager.add(createComponent()

            .setInterface(Servlet.class.getName(), null)

            .setImplementation(AgentDeploymentServlet.class)

            .add(createConfigurationDependency().setPropagate(true).setPid(AGENT_PID))

            .add(createServiceDependency().setService(ConnectionFactory.class).setRequired(true))

            .add(createServiceDependency().setService(LogService.class).setRequired(false))

        );

        

        Properties props = new Properties();

        props.put("pattern", "/*");

        manager.add(createComponent()

            .setInterface(Filter.class.getName(), null)

            .setImplementation(OverloadedFilter.class)

        );

    }

_{Like Feedback java.util.Properties}

Sample 74. Code Sample / Example / Snippet of java.util.concurrent.ExecutorService

    public void hundredStreamsConcurrently() throws Exception {

        ExecutorService e = Executors.newFixedThreadPool(5);

        for (int i = 0; i < 10; i++) {

            e.execute(new Runnable() {

                public void run() {

                    for (int i = 0; i < 10; i++) {

                        try {

                            isJarInputStreamReadable();

                        }

                        catch (Exception e) {

                            m_failure = e;

                        }

                    }

                }

            });

        }

        e.shutdown();

        e.awaitTermination(10, TimeUnit.SECONDS);



        assert m_failure == null : "Test failed: " + m_failure.getLocalizedMessage();

    }

_{Like Feedback java.util.concurrent.ExecutorService}

Sample 75. Code Sample / Example / Snippet of java.util.Timer

    public void shutdown(long delay) {

        Timer timer = new Timer();

        timer.schedule(new TimerTask() {

            @Override

            public void run() {

                try {

                    m_context.getBundle(0).stop();

                }

                catch (BundleException e) {

                    e.printStackTrace();

                }

            }

        }, delay);

    }

_{Like Feedback java.util.Timer}

Sample 76. Code Sample / Example / Snippet of java.util.Vector

    private static final String DEFAULT_PROPERTIES_FILE = "QueueMonitor.properties";



    String propertiesFile = DEFAULT_PROPERTIES_FILE;

    String broker = "tcp://localhost:61616";

    String connectID = "QueueMonitor";

    String username = "QueueMonitor";

    String password = "QueueMonitor";

    String browseQueues  = "Q1,Q2,Q3";

    String textFontName = "Dialog";

    String textFontStyle = "PLAIN";

    String textFontSize = "12";

    String title = "QueueMonitor";



    JTextArea textArea = new JTextArea();

    JScrollPane scrollPane = new JScrollPane(textArea);

    JButton browseButton = new JButton("Browse Queues");



    Vector theQueues = new Vector();

_{Like Feedback java.util.Vector}

Sample 77. Write CSV values to a file using au.com.bytecode.opencsv.CSVWriter

String[] stringArray1 = new String[5];

String[] stringArray2 = new String[5];

String[] stringArray3 = new String[5];



List listOfStringArrays = new ArrayList();

listOfStringArrays.add(stringArray1);

listOfStringArrays.add(stringArray2);

listOfStringArrays.add(stringArray3);



File file = new File("BuggyBread.txt");

CSVWriter csvWriter = null;

try {

   csvWriter = new CSVWriter(new FileWriter(file),CSVWriter.DEFAULT_SEPARATOR);

} catch (Exception ex){

}

csvWriter.writeAll(listOfStringArrays);

_{Like Feedback array of Strings csv writer}

Sample 78. Usage of java.util.stream.Stream

List<Integer> list1 = Arrays.asList(1, 2);

List<Integer> list2 = Arrays.asList(4, 5);



Stream.of(list1, list1)

  .flatMap(list -> list.stream())

  .forEach(System.out::println);

_{Like Feedback Stream.flatMap System.out::println}

Sample 79. Usage of Java 8 Consumer interface

Consumer<String> consumer = s->{

   System.out.println(s);

};



consumer.accept("BuggyBread"); // prints BuggyBread

_{Like Feedback Java 8 Consumer Consumer interface}

Sample 80. Usage of java.util.function.BiPredicate

BiPredicate<String, String> predicate = (s1, s2) -> (s1.equals(s2));



System.out.println(predicate.test("BUGGY", "BREAD"));

_{Like Feedback BiPredicate Java 8 BiPredicate}

Sample 81. Code to get Module name for List class

Module module = java.util.List.class.getModule();

System.out.println(module.getName()); // prints java.base

_{Like Feedback java 9 java 9 module}

Sample 82. Code to print all packages of a module

Module module = java.util.List.class.getModule();

System.out.println(module.getPackages());

_{Like Feedback java 9 java 9 modules}

Sample 83. Code to get exports of a particular Module

Module module = java.util.List.class.getModule();

ModuleDescriptor moduleDescriptor = module.getDescriptor();

System.out.println(moduleDescriptor.exports());

_{Like Feedback java 9 java 9 modules get exports for a module}

Sample 84. Code to get ModuleDescriptor from a particular Module

Module module = java.util.List.class.getModule();

ModuleDescriptor moduleDescriptor = module.getDescriptor();

_{Like Feedback java 9 java 9 modules get ModuleDescriptor for a module}

Sample 85. Code to get main class in a particular module

Module module = java.util.List.class.getModule();

ModuleDescriptor moduleDescriptor = module.getDescriptor();

System.out.println(moduleDescriptor.mainClass());

_{Like Feedback java 9 java 9 modules get main class for a module get main class for a module in java 9 java module}

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