Share

Search Java Code Snippets


  Help us in improving the repository. Add new snippets through 'Submit Code Snippet ' link.





#Java - Code Snippets for '#Threads' - 5 code snippet(s) found

 Sample 1. Singleton Class ( using private constructor , object initialization using static method, doubly checked , thread safe, synchronized , volatile reference )

class Singleton {
private static volatile Singleton instance = null;
private Singleton(){}
public static Singleton getInstance() {
if (instance == null) {
synchronized(Singleton.class) {
if (instance== null)
instance = new Singleton();
}
}
return instance;
}
}

   Like      Feedback     singleton   singleton class   volatile   private constructor    object initialization using static method   doubly checked    thread safe   synchronized block using class level lock   synchronized   synchronized block   class level lock  object initialization using getInstance


 Sample 2. Write a program to show thread usage in Java by implementing runnable interface

public class MyClass {
   static class MyThreadClass implements Runnable{

      public void start() {
         Thread t = new Thread(this,"threadName");
         t.start();
      }
      
      @Override
      public void run() {
         System.out.println("Hello");
         try {
            Thread.sleep(1000);
            System.out.println("Hello Again");
         } catch (InterruptedException e) {
            e.printStackTrace();
         }
         
      }
      
   }
   
   public static void main(String[] args){
      MyThreadClass myThreadClass = new MyThreadClass();
      myThreadClass.start();
      
      MyThreadClass myThreadClass2 = new MyThreadClass();
      myThreadClass2.start();
   }
}

   Like      Feedback     Threads  runnable interface


 Sample 3. Retry in case of exception

public static final int NUMBER_OF_RETRIES = 5;

try {
   // do something
} catch (Exception e) {
   int count;
   for (count = 1; count <= NUMBER_OF_RETRIES; count++) {
      Thread.sleep(5000);
   } catch (InterruptedException e1) {
      try {
         // do something again
         break;
      } catch (Exception ex) {
   }
}

   Like      Feedback     exception handling   exception   Retry in case of exception   for loop   for   Thread.sleep   InterruptedException


 Sample 4. 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


Subscribe to Java News and Posts. Get latest updates and posts on Java from Buggybread.com
Enter your email address:
Delivered by FeedBurner
 Sample 5. Write a Program to show Java thread usage by extending Thread class

public class MyClass {
   static class MyThreadClass extends Thread{

      @Override
      public void run() {
         System.out.println("Hello");
         try {
            Thread.sleep(1000);
            System.out.println("Hello Again");
         } catch (InterruptedException e) {
            e.printStackTrace();
         }
         
      }
      
   }
   
   public static void main(String[] args){
      MyThreadClass myThreadClass = new MyThreadClass();
      myThreadClass.start();
      
      MyThreadClass myThreadClass2 = new MyThreadClass();
      myThreadClass2.start();
   }
}

   Like      Feedback     Threads  Thread class



Subscribe to Java News and Posts. Get latest updates and posts on Java from Buggybread.com
Enter your email address:
Delivered by FeedBurner



comments powered by Disqus