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Thread Access through the Hash Table in Java
Posted on: April 16, 2007 By Deepak Kumar

Here, you will learn about how a thread is accessed by using the hash table in Java.

Thread Access through the Hash Table in Java

Here, you will learn about how a thread is accessed by using the hash table in Java.

Here is the code of the program:


import java.util.*;



public class ThreadedAccess implements Runnable{

  static int ThreadCount = 0;

  public void run(){

  String s = "This is thread " + ThreadCount++;

  Vector<String> v = new Vector<String>();

  v.addElement(s);

  v.addElement(s);

  try{

  Thread.sleep(2000);

  }

  catch(Exception e){}

  v.addElement(s);

  System.out.println(v);

  }

  

  public static void main(String[] args){

  try{

  for(int i = 0; i < 5; i++){

  (new Thread(new ThreadedAccess())).start();

  try{

  Thread.sleep(200);

  }

  catch(Exception e){}

  }

  }

  catch(Exception e){

  e.printStackTrace();

  }

  }

  private static ThreadLocal<Vector> vectors = 

	new ThreadLocal<Vector>();

  public static Vector getVector(){

  Vector v = (Vector) vectors.get();

  if (v == null){

  v = new Vector();

  vectors.set(v);

  }

  return v;

  }

  private static Hashtable<Thread,Vector> hvectors = 

  new Hashtable<Thread,Vector>();

  public static Vector getVectorPriorToJDK12(){

  Vector v = (Vector) hvectors.get(Thread.currentThread());

  if(v == null){

  v = new Vector();

  hvectors.put(Thread.currentThread(), v);

  }

  return v;

  }

}

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