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#Java - Code Snippets for '#File' - 80 code snippet(s) found

 Sample 1. Method to get all files from a directory recursively

List<File> fileList = new ArrayList();

List<File> read(String dir) throws IOException{
File directory = new File(dir);
File[] fList = directory.listFiles();
for(File file:fList){
if(file.isDirectory()){
read(file.getPath());
} else {
fileList.add(file);
}
}
return fileList;
}

   Like      Feedback     file handling   file   isDirectory()  .getPath()   recursion   java.io.File


 Sample 2. Get the content of a file in a string

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class FileToString {

public static void main(String[] args) throws IOException {

String line = null;

String wholePage = "";

FileReader fileReader =
new FileReader("/home/vivekvermani/test.txt");

BufferedReader bufferedReader =
new BufferedReader(fileReader);

while((line = bufferedReader.readLine()) != null) {
wholePage = wholePage + line + "
";
}

bufferedReader.close();

System.out.println(wholePage);
}
}

   Like      Feedback     reading file to string  import


 Sample 3. getting file path, absolute path and canonical path

public static void main(String[] args){
String parent = null;
File file = new File("/file.txt");
System.out.println(file.getPath());
System.out.println(file.getAbsolutePath());
try {
System.out.println(file.getCanonicalPath());
} catch (IOException e) {
e.printStackTrace();
}
}

   Like      Feedback     file  absolute path  canonical path  canonical  file handling  java.io.IOException


 Sample 4. Write to a file using File, FileOutputStream and ObjectOutputStream

class BuggyBread1{
   public static void main(String[] args){
      try {
         BuggyBread1 buggybread1 = new BuggyBread1();
         ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream(new File("newFile.txt")));
         objectOutputStream.writeObject(buggybread1);
      } catch (Exception e) {
         e.printStackTrace();
      }
   }
}

   Like      Feedback     File   FileOutputStream   ObjectOutputStream   file handling


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 Sample 5. Method to get specific format files from a directory

private Collection<File> getDocAndTextFiles() {
File directory = new File("C:DocDir");
if (directory.exists() && directory.isDirectory()) {
Collection<File> files = FileUtils.listFiles(directory, new String[] { "doc","txt" }, false);
}
return files;
}

   Like      Feedback     file handling  file  directory  FileUtils.listFiles  fileutils


 Sample 6. Load XLS file and print first column using poi XSSFWorkbook

public XSSFWorkbook loadXLSAndPrintFirstColumn(File xlsFile) {
   InputStream inputStream = null;
   try {
      inputStream = new FileInputStream(xlsFile);
   XSSFWorkbook xssFWorkbook = new XSSFWorkbook(inputStream);
      Sheet sheet = workbook.getSheetAt(workbook.getActiveSheetIndex());
      for (int index = 0; index < sheet.getPhysicalNumberOfRows(); index++) {
      try {
         Row row = sheet.getRow(index);
            System.out.println(row.getCell(0,Row.CREATE_NULL_AS_BLANK).getStringCellValue()));   
      } catch (Exception e) {
      System.out.println("Exception");
   }
}

}

   Like      Feedback     readinf xls  reading excel  apache poi  XSSFWorkbook  InputStream


 Sample 7. Create a new File

File file = new File("xyz.txt");
boolean status = file.createNewFile();

   Like      Feedback     file   file handling  file.createnewfile


 Sample 8. Create a new Directory

File dir = new File("c:xyz");
boolean status = file.mkdir();

   Like      Feedback     file handling  creating new directory  file.mkdir


 Sample 9. Load Properties using Property Class

private static Properties props = null;
   
private static void loadProperties(){
   try {
      if(props == null || props1 == null || props2 == null){
         props = new Properties();
         props.load(new FileInputStream(Constants.PROP_BASE_DIR + Constants.EMPLOYEE_REPORTING_PROP));
      } catch (FileNotFoundException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
      } catch (IOException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
      }

   }
}

   Like      Feedback     property class  properties  FileInputStream  file handling


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 Sample 10. Method to check if the the file exists and not a directory

public static boolean isOleFile(File file)
{
   if ((file == null) || (!file.exists()) || (file.isDirectory())) {
      return false;
   }

   return true;
}

   Like      Feedback     file handling  check if file exists  File class  check if file is a directory  file.isDirectory  file.exists


 Sample 11. Usage of java.io.FileInputStream

FileInputStream fis = new FileInputStream("mypodcast.mp3");
InputStreamRequestEntity re = new InputStreamRequestEntity(fis, "audio/mp3");

   Like      Feedback     ileInputStrea


 Sample 12. Usage of org.apache.hadoop.hdfs.server.namenode.FSEditLog.EditLogFileInputStream

EditLogFileInputStream edits =
new EditLogFileInputStream(getImageFile(sd, NameNodeFile.EDITS));
numEdits = FSEditLog.loadFSEdits(edits);
edits.close();
File editsNew = getImageFile(sd, NameNodeFile.EDITS_NEW);
if (editsNew.exists() && editsNew.length() > 0) {
edits = new EditLogFileInputStream(editsNew);
numEdits += FSEditLog.loadFSEdits(edits);
edits.close();

   Like      Feedback     EditLogFileInputStream  Apache Hadoop


 Sample 13. Usage of MD5MD5CRC32FileChecksum

final MD5MD5CRC32FileChecksum checksum = DFSClient.getFileChecksum(filename, nnproxy, socketFactory, socketTimeout);
MD5MD5CRC32FileChecksum.write(xml, checksum);

   Like      Feedback     MD5MD5CRC32FileChecksum  Apache Hadoop


 Sample 14. Usage of java.nio.channels.FileLock

File lockF = new File(root, STORAGE_FILE_LOCK);
lockF.deleteOnExit();
RandomAccessFile file = new RandomAccessFile(lockF, "rws");
FileLock res = null;
try {
   res = file.getChannel().tryLock();
} catch(OverlappingFileLockException oe) {

}

   Like      Feedback     java.nio  FileLock  input output  file handling


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 Sample 15. Code Sample / Example / Snippet of org.apache.hadoop.fs.FileStatus

  public synchronized void setPermission(String src, FsPermission permission

) throws IOException {

checkOwner(src);

dir.setPermission(src, permission);

getEditLog().logSync();

if (auditLog.isInfoEnabled()) {

final FileStatus stat = dir.getFileInfo(src);

logAuditEvent(UserGroupInformation.getCurrentUGI(),

Server.getRemoteIp(),

"setPermission", src, null, stat);

}

}


   Like      Feedback      org.apache.hadoop.fs.FileStatus


 Sample 16. Code Sample / Example / Snippet of org.apache.hadoop.hdfs.DistributedFileSystem

  public int metaSave(String[] argv, int idx) throws IOException {

String pathname = argv[idx];

DistributedFileSystem dfs = (DistributedFileSystem) fs;

dfs.metaSave(pathname);

System.out.println("Created file " + pathname + " on server " +

dfs.getUri());

return 0;

}


   Like      Feedback      org.apache.hadoop.hdfs.DistributedFileSystem


 Sample 17. Code Sample / Example / Snippet of org.apache.hadoop.fs.FileSystem

  public static long getTimestamp(Configuration conf, URI cache)

throws IOException {

FileSystem fileSystem = FileSystem.get(cache, conf);

Path filePath = new Path(cache.getPath());



return fileSystem.getFileStatus(filePath).getModificationTime();

}


   Like      Feedback      org.apache.hadoop.fs.FileSystem


 Sample 18. Code Sample / Example / Snippet of org.apache.storm.blobstore.BlobStoreFile

    public void testGetFileLength() throws IOException {

FileSystem fs = dfscluster.getFileSystem();

Map conf = new HashMap();

String validKey = "validkeyBasic";

String testString = "testingblob";

TestHdfsBlobStoreImpl hbs = new TestHdfsBlobStoreImpl(blobDir, conf, hadoopConf);

BlobStoreFile pfile = hbs.write(validKey, false);

SettableBlobMeta meta = new SettableBlobMeta();

meta.set_replication_factor(1);

pfile.setMetadata(meta);

OutputStream ios = pfile.getOutputStream();

ios.write(testString.getBytes(Charset.forName("UTF-8")));

ios.close();

assertEquals(testString.getBytes(Charset.forName("UTF-8")).length, pfile.getFileLength());

}


   Like      Feedback      org.apache.storm.blobstore.BlobStoreFile


 Sample 19. Code Sample / Example / Snippet of java.io.File

  public Schema create(SchemaPlus parentSchema, String name,

Map<String, Object> operand) {

final String directory = (String) operand.get("directory");

final File base =

(File) operand.get(ModelHandler.ExtraOperand.BASE_DIRECTORY.camelName);

File directoryFile = new File(directory);

if (base != null && !directoryFile.isAbsolute()) {

directoryFile = new File(base, directory);

}

String flavorName = (String) operand.get("flavor");

CsvTable.Flavor flavor;

if (flavorName == null) {

flavor = CsvTable.Flavor.SCANNABLE;

} else {

flavor = CsvTable.Flavor.valueOf(flavorName.toUpperCase());

}

return new CsvSchema(directoryFile, flavor);

}


   Like      Feedback      java.io.File


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 Sample 20. Code Sample / Example / Snippet of java.io.FileWriter

    private String createArtifact(String string) throws IOException {

File tmpFile = File.createTempFile("vap", "vm");

tmpFile.delete();

tmpFile.deleteOnExit();



FileWriter writer = new FileWriter(tmpFile);

writer.write(string);

writer.flush();

writer.close();



return tmpFile.toURI().toURL().toExternalForm();

}


   Like      Feedback      java.io.FileWriter


 Sample 21. Code Sample / Example / Snippet of java.nio.channels.FileChannel

    public static void copy(File input, File output) throws IOException {

FileInputStream fis = new FileInputStream(input);

FileOutputStream fos = new FileOutputStream(output);



try {

FileChannel ic = fis.getChannel();

FileChannel oc = fos.getChannel();

try {

oc.transferFrom(ic, 0, ic.size());

}

finally {

oc.close();

ic.close();

}

}

finally {

fis.close();

fos.close();

}

}


   Like      Feedback      java.nio.channels.FileChannel


 Sample 22. Code Sample / Example / Snippet of java.io.FileOutputStream

    public static void copy(File input, File output) throws IOException {

FileInputStream fis = new FileInputStream(input);

FileOutputStream fos = new FileOutputStream(output);



try {

FileChannel ic = fis.getChannel();

FileChannel oc = fos.getChannel();

try {

oc.transferFrom(ic, 0, ic.size());

}

finally {

oc.close();

ic.close();

}

}

finally {

fis.close();

fos.close();

}

}


   Like      Feedback      java.io.FileOutputStream


 Sample 23. Code Sample / Example / Snippet of java.io.FileInputStream

    public static void copy(File input, File output) throws IOException {

FileInputStream fis = new FileInputStream(input);

FileOutputStream fos = new FileOutputStream(output);



try {

FileChannel ic = fis.getChannel();

FileChannel oc = fos.getChannel();

try {

oc.transferFrom(ic, 0, ic.size());

}

finally {

oc.close();

ic.close();

}

}

finally {

fis.close();

fos.close();

}

}


   Like      Feedback      java.io.FileInputStream


 Sample 24. Code Sample / Example / Snippet of java.io.File

    private ArtifactObject createArtifact(String name, Attributes attrs, InputStream is) throws Exception {

ArtifactObject artifact = findArtifact(name, attrs);



if (artifact != null) {

return artifact;

}

else if (Boolean.parseBoolean(attrs.getValue(DEPLOYMENT_PACKAGE_MISSING))) {

m_log.log(LogService.LOG_WARNING, String.format("Unable to create artifact '%s' as it is missing...", name));

return null;

}

else {

m_log.log(LogService.LOG_INFO, String.format("Creating artifact '%s'...", name));



File file = storeArtifactContents(name, is);

try {

return m_workspace.createArtifact(file.toURI().toURL().toExternalForm(), true /* upload */);

}

finally {

file.delete();

}

}

}


   Like      Feedback      java.io.File


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 Sample 25. Code Sample / Example / Snippet of org.apache.bcel.classfile.AnnotationDefault

    public void testMethodAnnotations() throws ClassNotFoundException

{

final JavaClass clazz = getTestClass(PACKAGE_BASE_NAME+".data.SimpleAnnotation");

final Method m = getMethod(clazz, "fruit");

final AnnotationDefault a = (AnnotationDefault) findAttribute(

"AnnotationDefault", m.getAttributes());

final SimpleElementValue val = (SimpleElementValue) a.getDefaultValue();

assertTrue("Should be STRING but is " + val.getElementValueType(), val

.getElementValueType() == ElementValue.STRING);

assertTrue("Should have default of bananas but default is "

+ val.getValueString(), val.getValueString().equals("bananas"));

}


   Like      Feedback      org.apache.bcel.classfile.AnnotationDefault


 Sample 26. Code Sample / Example / Snippet of org.apache.bcel.classfile.Method

    public void testMethodAnnotations() throws ClassNotFoundException

{

final JavaClass clazz = getTestClass(PACKAGE_BASE_NAME+".data.SimpleAnnotation");

final Method m = getMethod(clazz, "fruit");

final AnnotationDefault a = (AnnotationDefault) findAttribute(

"AnnotationDefault", m.getAttributes());

final SimpleElementValue val = (SimpleElementValue) a.getDefaultValue();

assertTrue("Should be STRING but is " + val.getElementValueType(), val

.getElementValueType() == ElementValue.STRING);

assertTrue("Should have default of bananas but default is "

+ val.getValueString(), val.getValueString().equals("bananas"));

}


   Like      Feedback      org.apache.bcel.classfile.Method


 Sample 27. Code Sample / Example / Snippet of org.apache.bcel.classfile.SimpleElementValue

    public void testMethodAnnotations() throws ClassNotFoundException

{

final JavaClass clazz = getTestClass(PACKAGE_BASE_NAME+".data.SimpleAnnotation");

final Method m = getMethod(clazz, "fruit");

final AnnotationDefault a = (AnnotationDefault) findAttribute(

"AnnotationDefault", m.getAttributes());

final SimpleElementValue val = (SimpleElementValue) a.getDefaultValue();

assertTrue("Should be STRING but is " + val.getElementValueType(), val

.getElementValueType() == ElementValue.STRING);

assertTrue("Should have default of bananas but default is "

+ val.getValueString(), val.getValueString().equals("bananas"));

}


   Like      Feedback      org.apache.bcel.classfile.SimpleElementValue


 Sample 28. Code Sample / Example / Snippet of org.apache.bcel.classfile.JavaClass

    public void testMethodAnnotations() throws ClassNotFoundException

{

final JavaClass clazz = getTestClass(PACKAGE_BASE_NAME+".data.SimpleAnnotation");

final Method m = getMethod(clazz, "fruit");

final AnnotationDefault a = (AnnotationDefault) findAttribute(

"AnnotationDefault", m.getAttributes());

final SimpleElementValue val = (SimpleElementValue) a.getDefaultValue();

assertTrue("Should be STRING but is " + val.getElementValueType(), val

.getElementValueType() == ElementValue.STRING);

assertTrue("Should have default of bananas but default is "

+ val.getValueString(), val.getValueString().equals("bananas"));

}


   Like      Feedback      org.apache.bcel.classfile.JavaClass


 Sample 29. Code Sample / Example / Snippet of org.apache.bcel.classfile.Attribute

    protected String dumpAttributes(final Attribute[] as)

{

final StringBuilder result = new StringBuilder();

result.append("AttributeArray:[");

for (int i = 0; i < as.length; i++)

{

final Attribute attr = as[i];

result.append(attr.toString());

if (i + 1 < as.length) {

result.append(",");

}

}

result.append("]");

return result.toString();

}


   Like      Feedback      org.apache.bcel.classfile.Attribute


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 Sample 30. Code Sample / Example / Snippet of org.apache.bcel.classfile.AnnotationEntry

    protected String dumpAnnotationEntries(final AnnotationEntry[] as)

{

final StringBuilder result = new StringBuilder();

result.append("[");

for (int i = 0; i < as.length; i++)

{

final AnnotationEntry annotation = as[i];

result.append(annotation.toShortString());

if (i + 1 < as.length) {

result.append(",");

}

}

result.append("]");

return result.toString();

}


   Like      Feedback      org.apache.bcel.classfile.AnnotationEntry


 Sample 31. Code Sample / Example / Snippet of org.apache.bcel.classfile.EnclosingMethod

    public void testCheckMethodLevelNamedInnerClass()

throws ClassNotFoundException

{

final JavaClass clazz = getTestClass(PACKAGE_BASE_NAME+".data.AttributeTestClassEM01$1S");

final ConstantPool pool = clazz.getConstantPool();

final Attribute[] encMethodAttrs = findAttribute("EnclosingMethod", clazz);

assertTrue("Expected 1 EnclosingMethod attribute but found "

+ encMethodAttrs.length, encMethodAttrs.length == 1);

final EnclosingMethod em = (EnclosingMethod) encMethodAttrs[0];

final String enclosingClassName = em.getEnclosingClass().getBytes(pool);

final String enclosingMethodName = em.getEnclosingMethod().getName(pool);

assertTrue(

"Expected class name to be '"+PACKAGE_BASE_SIG+"/data/AttributeTestClassEM01' but was "

+ enclosingClassName, enclosingClassName

.equals(PACKAGE_BASE_SIG+"/data/AttributeTestClassEM01"));

assertTrue("Expected method name to be 'main' but was "

+ enclosingMethodName, enclosingMethodName.equals("main"));

}


   Like      Feedback      org.apache.bcel.classfile.EnclosingMethod


 Sample 32. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantPool

    public void testCheckMethodLevelNamedInnerClass()

throws ClassNotFoundException

{

final JavaClass clazz = getTestClass(PACKAGE_BASE_NAME+".data.AttributeTestClassEM01$1S");

final ConstantPool pool = clazz.getConstantPool();

final Attribute[] encMethodAttrs = findAttribute("EnclosingMethod", clazz);

assertTrue("Expected 1 EnclosingMethod attribute but found "

+ encMethodAttrs.length, encMethodAttrs.length == 1);

final EnclosingMethod em = (EnclosingMethod) encMethodAttrs[0];

final String enclosingClassName = em.getEnclosingClass().getBytes(pool);

final String enclosingMethodName = em.getEnclosingMethod().getName(pool);

assertTrue(

"Expected class name to be '"+PACKAGE_BASE_SIG+"/data/AttributeTestClassEM01' but was "

+ enclosingClassName, enclosingClassName

.equals(PACKAGE_BASE_SIG+"/data/AttributeTestClassEM01"));

assertTrue("Expected method name to be 'main' but was "

+ enclosingMethodName, enclosingMethodName.equals("main"));

}


   Like      Feedback      org.apache.bcel.classfile.ConstantPool


 Sample 33. Code Sample / Example / Snippet of org.apache.bcel.classfile.ArrayElementValue

    private void assertArrayElementValue(final int nExpectedArrayValues, final AnnotationEntry anno)

{

final ElementValuePair elementValuePair = anno.getElementValuePairs()[0];

assertEquals("value", elementValuePair.getNameString());

final ArrayElementValue ev = (ArrayElementValue) elementValuePair.getValue();

final ElementValue[] eva = ev.getElementValuesArray();

assertEquals(nExpectedArrayValues, eva.length);

}


   Like      Feedback      org.apache.bcel.classfile.ArrayElementValue


 Sample 34. Code Sample / Example / Snippet of org.apache.bcel.classfile.ElementValuePair

    private void assertArrayElementValue(final int nExpectedArrayValues, final AnnotationEntry anno)

{

final ElementValuePair elementValuePair = anno.getElementValuePairs()[0];

assertEquals("value", elementValuePair.getNameString());

final ArrayElementValue ev = (ArrayElementValue) elementValuePair.getValue();

final ElementValue[] eva = ev.getElementValuesArray();

assertEquals(nExpectedArrayValues, eva.length);

}


   Like      Feedback      org.apache.bcel.classfile.ElementValuePair


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 Sample 35. Code Sample / Example / Snippet of org.apache.bcel.classfile.ClassParser

    private void testJar(final File file) throws Exception {

System.out.println(file);

try (JarFile jar = new JarFile(file)) {

final Enumeration<JarEntry> en = jar.entries();

while (en.hasMoreElements()) {

final JarEntry e = en.nextElement();

final String name = e.getName();

if (name.endsWith(".class")) {

try (InputStream in = jar.getInputStream(e)) {

final ClassParser parser = new ClassParser(in, name);

final JavaClass jc = parser.parse();

for (final Method m : jc.getMethods()) {

compare(name, m);

}

}

}

}

}

}


   Like      Feedback      org.apache.bcel.classfile.ClassParser


 Sample 36. Code Sample / Example / Snippet of org.apache.bcel.classfile.Code

    private void compare(final String name, final Method m) {

final Code c = m.getCode();

if (c == null) {

return; // e.g. abstract method

}

final byte[] src = c.getCode();

final InstructionList il = new InstructionList(src);

final byte[] out = il.getByteCode();

if (src.length == out.length) {

assertArrayEquals(name + ": " + m.toString(), src, out);

} else {

System.out.println(name + ": " + m.toString() + " " + src.length + " " + out.length);

System.out.println(bytesToHex(src));

System.out.println(bytesToHex(out));

for (final InstructionHandle ih : il) {

System.out.println(ih.toString(false));

}

fail("Array comparison failure");

}

}


   Like      Feedback      org.apache.bcel.classfile.Code


 Sample 37. Code Sample / Example / Snippet of org.apache.bcel.classfile.LocalVariableTable

    public void testB79() throws ClassNotFoundException

{

final JavaClass clazz = getTestClass(PACKAGE_BASE_NAME+".data.PLSETestClass");

final ClassGen gen = new ClassGen(clazz);

final ConstantPoolGen pool = gen.getConstantPool();

final Method m = gen.getMethodAt(2);

final LocalVariableTable lvt = m.getLocalVariableTable();

final MethodGen mg = new MethodGen(m, gen.getClassName(), pool);

final LocalVariableTable new_lvt = mg.getLocalVariableTable(mg.getConstantPool());

assertEquals("number of locals", lvt.getTableLength(), new_lvt.getTableLength());

}


   Like      Feedback      org.apache.bcel.classfile.LocalVariableTable


 Sample 38. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantUtf8

    public static String[] getClassDependencies(ConstantPool pool) {

String[] tempArray = new String[pool.getLength()];

int size = 0;

StringBuilder buf = new StringBuilder();



for (int idx = 0; idx < pool.getLength(); idx++) {

Constant c = pool.getConstant(idx);

if (c != null && c.getTag() == Constants.CONSTANT_Class) {

ConstantUtf8 c1 = (ConstantUtf8) pool.getConstant(((ConstantClass) c).getNameIndex());

buf.setLength(0);

buf.append(c1.getBytes());

for (int n = 0; n < buf.length(); n++) {

if (buf.charAt(n) == '/') {

buf.setCharAt(n, '.');

}

}



tempArray[size++] = buf.toString();

}

}



String[] dependencies = new String[size];

System.arraycopy(tempArray, 0, dependencies, 0, size);

return dependencies;

}


   Like      Feedback      org.apache.bcel.classfile.ConstantUtf8


 Sample 39. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantNameAndType

    private void visitRef(ConstantCP ccp, boolean method) {

String class_name = ccp.getClass(cp);

add(class_name);



ConstantNameAndType cnat = (ConstantNameAndType) cp.getConstant(ccp.getNameAndTypeIndex(),

Constants.CONSTANT_NameAndType);



String signature = cnat.getSignature(cp);



if (method) {

Type type = Type.getReturnType(signature);



checkType(type);



for (Type type1 : Type.getArgumentTypes(signature)) {

checkType(type1);

}

} else {

checkType(Type.getType(signature));

}

}


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 Sample 40. Code Sample / Example / Snippet of org.apache.bcel.classfile.Constant

    public String getEnumTypeString()

{

return ((ConstantUtf8) getConstantPool().getConstant(typeIdx))

.getBytes();

}


   Like      Feedback      org.apache.bcel.classfile.Constant


 Sample 41. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantInteger

    public int getValueInt()

{

if (super.getElementValueType() != PRIMITIVE_INT) {

throw new RuntimeException(

"Dont call getValueString() on a non STRING ElementValue");

}

final ConstantInteger c = (ConstantInteger) getConstantPool().getConstant(idx);

return c.getBytes();

}


   Like      Feedback      org.apache.bcel.classfile.ConstantInteger


 Sample 42. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantClass

    public String getEnumTypeString()

{

return ((ConstantUtf8) getConstantPool().getConstant(typeIdx))

.getBytes();

}


   Like      Feedback      org.apache.bcel.classfile.ConstantClass


 Sample 43. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantCP

    public String getClassName( final ConstantPoolGen cpg ) {

final ConstantPool cp = cpg.getConstantPool();

final ConstantCP cmr = (ConstantCP) cp.getConstant(super.getIndex());

final String className = cp.getConstantString(cmr.getClassIndex(), Const.CONSTANT_Class);

if (className.startsWith("[")) {

return "java.lang.Object";

}

return className.replace('/', '.');

}


   Like      Feedback      org.apache.bcel.classfile.ConstantCP


 Sample 44. Code Sample / Example / Snippet of org.apache.bcel.classfile.Annotations

    public FieldGen(final Field field, final ConstantPoolGen cp) {

this(field.getAccessFlags(), Type.getType(field.getSignature()), field.getName(), cp);

final Attribute[] attrs = field.getAttributes();

for (final Attribute attr : attrs) {

if (attr instanceof ConstantValue) {

setValue(((ConstantValue) attr).getConstantValueIndex());

} else if (attr instanceof Annotations) {

final Annotations runtimeAnnotations = (Annotations)attr;

final AnnotationEntry[] annotationEntries = runtimeAnnotations.getAnnotationEntries();

for (final AnnotationEntry element : annotationEntries) {

addAnnotationEntry(new AnnotationEntryGen(element,cp,false));

}

} else {

addAttribute(attr);

}

}

}


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 Sample 45. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantFloat

    public int lookupFloat( final float n ) {

final int bits = Float.floatToIntBits(n);

for (int i = 1; i < index; i++) {

if (constants[i] instanceof ConstantFloat) {

final ConstantFloat c = (ConstantFloat) constants[i];

if (Float.floatToIntBits(c.getBytes()) == bits) {

return i;

}

}

}

return -1;

}


   Like      Feedback      org.apache.bcel.classfile.ConstantFloat


 Sample 46. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantString

    public String stringifyValue()

{

final ConstantUtf8 cu8 = (ConstantUtf8) getConstantPool().getConstant(valueIdx);

return cu8.getBytes();

}


   Like      Feedback      org.apache.bcel.classfile.ConstantString


 Sample 47. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantLong

    public int lookupLong( final long n ) {

for (int i = 1; i < index; i++) {

if (constants[i] instanceof ConstantLong) {

final ConstantLong c = (ConstantLong) constants[i];

if (c.getBytes() == n) {

return i;

}

}

}

return -1;

}


   Like      Feedback      org.apache.bcel.classfile.ConstantLong


 Sample 48. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantDouble

    public int lookupDouble( final double n ) {

final long bits = Double.doubleToLongBits(n);

for (int i = 1; i < index; i++) {

if (constants[i] instanceof ConstantDouble) {

final ConstantDouble c = (ConstantDouble) constants[i];

if (Double.doubleToLongBits(c.getBytes()) == bits) {

return i;

}

}

}

return -1;

}


   Like      Feedback      org.apache.bcel.classfile.ConstantDouble


 Sample 49. Code Sample / Example / Snippet of org.apache.bcel.classfile.ConstantValue

    public void visitField( final Field field ) {

_out.println();

_out.println(" field = new FieldGen(" + printFlags(field.getAccessFlags()) + ", "

+ printType(field.getSignature()) + ", "" + field.getName() + "", _cp);");

final ConstantValue cv = field.getConstantValue();

if (cv != null) {

final String value = cv.toString();

_out.println(" field.setInitValue(" + value + ")");

}

_out.println(" _cg.addField(field.getField());");

}


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 Sample 50. Code Sample / Example / Snippet of org.apache.bcel.classfile.MethodParameters

    public Attribute copy(final ConstantPool _constant_pool) {

final MethodParameters c = (MethodParameters) clone();

c.parameters = new MethodParameter[parameters.length];



for (int i = 0; i < parameters.length; i++) {

c.parameters[i] = parameters[i].copy();

}

c.setConstantPool(_constant_pool);

return c;

}


   Like      Feedback      org.apache.bcel.classfile.MethodParameters


 Sample 51. Code Sample / Example / Snippet of org.apache.bcel.classfile.Deprecated

    public Attribute copy( final ConstantPool _constant_pool ) {

final Deprecated c = (Deprecated) clone();

if (bytes != null) {

c.bytes = new byte[bytes.length];

System.arraycopy(bytes, 0, c.bytes, 0, bytes.length);

}

c.setConstantPool(_constant_pool);

return c;

}


   Like      Feedback      org.apache.bcel.classfile.Deprecated


 Sample 52. Code Sample / Example / Snippet of org.apache.bcel.classfile.BootstrapMethods

    public BootstrapMethods copy(final ConstantPool _constant_pool) {

final BootstrapMethods c = (BootstrapMethods) clone();

c.bootstrap_methods = new BootstrapMethod[bootstrap_methods.length];



for (int i = 0; i < bootstrap_methods.length; i++) {

c.bootstrap_methods[i] = bootstrap_methods[i].copy();

}

c.setConstantPool(_constant_pool);

return c;

}


   Like      Feedback      org.apache.bcel.classfile.BootstrapMethods


 Sample 53. Code Sample / Example / Snippet of org.apache.bcel.classfile.InnerClasses

    public Attribute copy( final ConstantPool _constant_pool ) {

final InnerClasses c = (InnerClasses) clone();

c.inner_classes = new InnerClass[inner_classes.length];

for (int i = 0; i < inner_classes.length; i++) {

c.inner_classes[i] = inner_classes[i].copy();

}

c.setConstantPool(_constant_pool);

return c;

}


   Like      Feedback      org.apache.bcel.classfile.InnerClasses


 Sample 54. Code Sample / Example / Snippet of org.apache.bcel.classfile.Synthetic

    public Attribute copy( final ConstantPool _constant_pool ) {

final Synthetic c = (Synthetic) clone();

if (bytes != null) {

c.bytes = new byte[bytes.length];

System.arraycopy(bytes, 0, c.bytes, 0, bytes.length);

}

c.setConstantPool(_constant_pool);

return c;

}


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 Sample 55. Code Sample / Example / Snippet of org.apache.bcel.classfile.LocalVariableTypeTable

    public Attribute copy(final ConstantPool constant_pool) {

final LocalVariableTypeTable c = (LocalVariableTypeTable) clone();



c.local_variable_type_table = new LocalVariable[local_variable_type_table.length];

for (int i = 0; i < local_variable_type_table.length; i++) {

c.local_variable_type_table[i] = local_variable_type_table[i].copy();

}



c.setConstantPool(constant_pool);

return c;

}


   Like      Feedback      org.apache.bcel.classfile.LocalVariableTypeTable


 Sample 56. Code Sample / Example / Snippet of org.apache.bcel.classfile.Node

  public void jjtAddChild(Node n, int i) {

if (children == null) {

children = new Node[i + 1];

} else if (i >= children.length) {

Node c[] = new Node[i + 1];

System.arraycopy(children, 0, c, 0, children.length);

children = c;

}

children[i] = n;

}


   Like      Feedback      org.apache.bcel.classfile.Node


 Sample 57. Code Sample / Example / Snippet of org.apache.bcel.classfile.ParameterAnnotations

  public static ParameterAnnotationEntry[] createParameterAnnotationEntries(final Attribute[] attrs) {

final List<ParameterAnnotationEntry> accumulatedAnnotations = new ArrayList<>(attrs.length);

for (final Attribute attribute : attrs) {

if (attribute instanceof ParameterAnnotations) {

final ParameterAnnotations runtimeAnnotations = (ParameterAnnotations)attribute;

Collections.addAll(accumulatedAnnotations, runtimeAnnotations.getParameterAnnotationEntries());

}

}

return accumulatedAnnotations.toArray(new ParameterAnnotationEntry[accumulatedAnnotations.size()]);

}


   Like      Feedback      org.apache.bcel.classfile.ParameterAnnotations


 Sample 58. Code Sample / Example / Snippet of org.apache.bcel.classfile.Unknown

    public Attribute copy( final ConstantPool _constant_pool ) {

final Unknown c = (Unknown) clone();

if (bytes != null) {

c.bytes = new byte[bytes.length];

System.arraycopy(bytes, 0, c.bytes, 0, bytes.length);

}

c.setConstantPool(_constant_pool);

return c;

}


   Like      Feedback      org.apache.bcel.classfile.Unknown


 Sample 59. Code Sample / Example / Snippet of org.apache.bcel.classfile.StackMap

    public Attribute copy( final ConstantPool _constant_pool ) {

final StackMap c = (StackMap) clone();

c.map = new StackMapEntry[map.length];

for (int i = 0; i < map.length; i++) {

c.map[i] = map[i].copy();

}

c.setConstantPool(_constant_pool);

return c;

}


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 Sample 60. Code Sample / Example / Snippet of org.apache.bcel.classfile.LineNumberTable

    public Attribute copy( final ConstantPool _constant_pool ) {

final LineNumberTable c = (LineNumberTable) clone();

c.line_number_table = new LineNumber[line_number_table.length];

for (int i = 0; i < line_number_table.length; i++) {

c.line_number_table[i] = line_number_table[i].copy();

}

c.setConstantPool(_constant_pool);

return c;

}


   Like      Feedback      org.apache.bcel.classfile.LineNumberTable


 Sample 61. Code Sample / Example / Snippet of org.apache.bcel.classfile.DescendingVisitor

    private void field_and_method_refs_are_valid() {

try {

final JavaClass jc = Repository.lookupClass(myOwner.getClassName());

final DescendingVisitor v = new DescendingVisitor(jc, new FAMRAV_Visitor(jc));

v.visit();



} catch (final ClassNotFoundException e) {

throw new AssertionViolatedException("Missing class: " + e, e);

}

}


   Like      Feedback      org.apache.bcel.classfile.DescendingVisitor


 Sample 62. Code Sample / Example / Snippet of org.apache.bcel.classfile.Field

        public void visitGETSTATIC(final GETSTATIC o) {

try {

final String field_name = o.getFieldName(cpg);

final JavaClass jc = Repository.lookupClass(getObjectType(o).getClassName());

final Field[] fields = jc.getFields();

Field f = null;

for (final Field field : fields) {

if (field.getName().equals(field_name)) {

f = field;

break;

}

}

if (f == null) {

throw new AssertionViolatedException("Field '" + field_name + "' not found in " + jc.getClassName());

}



if (! (f.isStatic())) {

constraintViolated(o, "Referenced field '"+f+"' is not static which it should be.");

}

} catch (final ClassNotFoundException e) {

throw new AssertionViolatedException("Missing class: " + e, e);

}

}




   Like      Feedback      org.apache.bcel.classfile.Field


 Sample 63. Code Sample / Example / Snippet of org.apache.commons.compress.archivers.zip.ZipFile

    private void removeEntriesFoundInZipFile(final File result, final Map<String, byte[]> entries) throws IOException {

final ZipFile zf = new ZipFile(result);

final Enumeration<ZipArchiveEntry> entriesInPhysicalOrder = zf.getEntriesInPhysicalOrder();

while (entriesInPhysicalOrder.hasMoreElements()){

final ZipArchiveEntry zipArchiveEntry = entriesInPhysicalOrder.nextElement();

final InputStream inputStream = zf.getInputStream(zipArchiveEntry);

final byte[] actual = IOUtils.toByteArray(inputStream);

final byte[] expected = entries.remove(zipArchiveEntry.getName());

assertArrayEquals( "For " + zipArchiveEntry.getName(), expected, actual);

}

zf.close();

}


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 Sample 64. Code Sample / Example / Snippet of org.apache.commons.compress.archivers.sevenz.SevenZOutputFile

    public void testReadingBackLZMA2DictSize() throws Exception {

final File output = new File(dir, "lzma2-dictsize.7z");

final SevenZOutputFile outArchive = new SevenZOutputFile(output);

try {

outArchive.setContentMethods(Arrays.asList(new SevenZMethodConfiguration(SevenZMethod.LZMA2, 1 << 20)));

final SevenZArchiveEntry entry = new SevenZArchiveEntry();

entry.setName("foo.txt");

outArchive.putArchiveEntry(entry);

outArchive.write(new byte[] { 'A' });

outArchive.closeArchiveEntry();

} finally {

outArchive.close();

}



final SevenZFile archive = new SevenZFile(output);

try {

final SevenZArchiveEntry entry = archive.getNextEntry();

final SevenZMethodConfiguration m = entry.getContentMethods().iterator().next();

assertEquals(SevenZMethod.LZMA2, m.getMethod());

assertEquals(1 << 20, m.getOptions());

} finally {

archive.close();

}

}


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 Sample 65. Code Sample / Example / Snippet of org.apache.commons.compress.archivers.sevenz.SevenZFile

    public void testAllEmptyFilesArchive() throws Exception {

final SevenZFile archive = new SevenZFile(getFile("7z-empty-mhc-off.7z"));

try {

assertNotNull(archive.getNextEntry());

} finally {

archive.close();

}

}


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 Sample 66. GunZip file using Apache Commons


   public void testGzipCreation() throws Exception {
final File input = getFile("test1.xml");
final File output = new File(dir, "test1.xml.gz");
final OutputStream out = new FileOutputStream(output);
try {
final CompressorOutputStream cos = new CompressorStreamFactory().createCompressorOutputStream("gz", out);
try {
IOUtils.copy(new FileInputStream(input), cos);
} finally {
cos.close();
}
} finally {
out.close();
}
}

   Like      Feedback     Zip file using Apache Commons   Compress file using Apache Commons   GunZip file using Apache Commons  Code Sample / Example / Snippet of org.apache.commons.compress.compressors.CompressorOutputStream  IOUtils.copy


 Sample 67. Write a program that reads file using FileReader and BufferedReader

File file = new File("/home/sample.txt");
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
while ((line = bufferedReader.readLine()) != null) {
System.out.println(line);
}

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 Sample 68. Maven - Add Dependency in Pom File

<dependencies>
<dependency>
<groupId></groupId>
<artifactId></artifactId>
</dependency>
</dependencies>

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 Sample 69. Maven Pom File Template

<project>
<parent>
<groupId></groupId>
<artifactId></artifactId>
<version></version>
</parent>

<modelVersion></modelVersion>

<artifactId></artifactId>
<packaging></packaging>

<name></name>
<url></url>

<properties>
</properties>

<dependencies>
<dependency>
<groupId></groupId>
<artifactId></artifactId>
</dependency>
</dependencies>
<build>
<resources>
<resource>
   <directory></directory>
   <filtering></filtering>
</resource>
</resources>
<plugins>
<plugin>
   <groupId>org.apache.maven.plugins</groupId>
   <artifactId>maven-jar-plugin</artifactId>
</plugin>
<plugin>
   <artifactId>maven-assembly-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

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 Sample 70. Maven - SCM ( Source Code Management ) config in POM file

<scm>
<connection></connection>
<developerConnection></developerConnection>
<url></url>
</scm>

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 Sample 71. Rename a File

public static void main(String[] args) {
File oldFileName = new File("D:/oldFile.txt");
File newFileName = new File("D:/newFile.txt");
oldFileName.renameTo(newFileName);
}

   Like      Feedback     file io  input output  rename a file  renaming file


 Sample 72. 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);

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 Sample 73. Rolling File Appender for Log4j


                 ignoreExceptions="false">
      
   %d %p %c - %m %n
      

      

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 Sample 74. Sample Log4j config with Rolling File Appender within Time Based Triggering Policy

<Configuration status="DEBUG">
<Appenders>
<RollingFile name="File" fileName="logs/xyz.log" filePattern="logs/xyz-%d{MM-dd-yyyy}.log.gz">
      <TimeBasedTriggeringPolicy />
   </RollingFile>
</Appenders>
<Loggers>
<Root level="DEBUG">
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>

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 Sample 75. Sample Log4j config with RollingRandomAccessFile appender and TimeBasedTriggeringPolicy

<Configuration status="INFO">
<Appenders>
<RollingRandomAccessFile name="File" fileName="logs/xyz.log" immediateFlush="true" filePattern="logs/xyz-%d{MM-dd-yyyy}.log.gz">
      <TimeBasedTriggeringPolicy />
   </RollingRandomAccessFile>
</Appenders>
<Loggers>
<Root level="INFO">
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>

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 Sample 76. Sample Log4j config file with RollingRandomAccessFile appender ( Rolling Logs ) and SizeBasedTriggeringPolicy

<Configuration status="INFO">
<Appenders>
<RollingRandomAccessFile name="File" fileName="logs/xyz.log" immediateFlush="true" filePattern="logs/xyz-%d{MM-dd-yyyy}.log.gz">
      <SizeBasedTriggeringPolicy size="250 MB"/>
   </RollingRandomAccessFile>
</Appenders>
<Loggers>
<Root level="INFO">
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>

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 Sample 77. Usage of

import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.context.annotation.Bean;
import org.springframework.web.multipart.MultipartResolver;

@EnableWebMvc
@Configuration
public class Application extends WebMvcConfigurerAdapter {
@Bean
public MultipartResolver multipartResolver() {
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
multipartResolver.setMaxUploadSize(500000);
return multipartResolver;
}
}

   Like      Feedback     Usage of MultipartResolver  multipartResolver.setMaxUploadSize(500000)  Setting max file size using Spring multipartResolver


 Sample 78. Get only files from a directory using FileFilter

File dir = new File("C:/Folder");

File[] files = dir.listFiles(new FileFilter() {
@Override
public boolean accept(File file) {
return file.isFile();
}
});

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 Sample 79. Get only sub directories in a directory using FileFilter

File dir = new File("C:/Folder");

File[] subdir = dir.listFiles(new FileFilter() {
   @Override
   public boolean accept(File file) {
      return file.isDirectory();
   }
});

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 Sample 80. Write a Program to read a file and then count number of words

public class CountwordsinFile {
   public static void main(String[] args) throws IOException{
      String line = null;
      
      File file = new File("C:Hello.txt");
      FileReader fileReader = new FileReader(file);
      
      BufferedReader bufferedReader = new BufferedReader(fileReader);
      
      int countWords = 0;
      
      do {
      
         line = bufferedReader.readLine();
       countWords += line.split(" ").length;
      
      } while(line != null);
   }
}

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