Determine thread hold synchronized lock in java

Source code below will print true if current thread hold synchronized lock for current object and print false for otherwise.

*******************************************
COMPLETE SOURCE CODE FOR : DetermineThreadHoldSynchronizedLock.java
*******************************************

//This program will print three value whether current thread hold synchronized lock
//for cuurent object or not.
public class DetermineThreadHoldSynchronizedLock
{
boolean isLock;

public DetermineThreadHoldSynchronizedLock()
{
 //Check whether current thread hold synchronized lock for current object
 isLock=Thread.holdsLock(this);

 //Print lock value
 //It should print false
 System.out.println("HOLD SYNCHRONIZED : "+isLock);

 //Go to method locker()
 locker();
}

public void locker()
{
 //Current thread get lock from current object
 //It's mean other thread can't interrupt untill this thread get out from
 //synchronized block,{}...like below
 synchronized (this)
 {
  isLock=Thread.holdsLock(this);
  //Print lock value
  //It should print true
  System.out.println("HOLD SYNCHRONIZED : "+isLock);
 }
 lastCheck();
}

public void lastCheck()
{
 //Check whether current thread hold synchronized lock for current object
 isLock=Thread.holdsLock(this);
 //Print lock value
 //It should print false
 System.out.println("HOLD SYNCHRONIZED : "+isLock);
}

public static void main(String[]args)
{
 DetermineThreadHoldSynchronizedLock dthsl=new DetermineThreadHoldSynchronizedLock();
}
}

*******************************************
JUST COMPILE AND EXECUTE IT
*******************************************

Pause thread in java

Source code below will print hi after pause for 5 seconds.

********************************************************
COMPLETE SOURCE CODE FOR : ThreadPause.java
********************************************************

public class ThreadPause extends Thread
{
public void run()
{
 //Pause thread for 5 seconds before print hi
 try
 {
  sleep(5000);
 }
 catch(Exception exception)
 {
  exception.printStackTrace();
 }

 //Print hi
 System.out.println("hi");
}

public static void main(String[]args)
{
 //Create a thread by create ThreadPause object
 ThreadPause a=new ThreadPause();

 //Start the thread
 a.start();
}
}

********************************************************
JUST COMPILE AND EXECUTE IT
********************************************************

Stop thread in java

***********************************************
COMPLETE SOURCE CODE FOR : StopThread.java
***********************************************

import javax.swing.JOptionPane;

public class StopThread implements Runnable
{
int currentValue=0;

public void run()
{
 while(true)
 {
  JOptionPane.showMessageDialog(null,"currentValue = "+currentValue);

  String temp=JOptionPane.showInputDialog(null,"CHOOSE 1 OR 2\n1-Continue Thread\n2-Stop Thread");

  if(temp.equals("2"))
  {
   JOptionPane.showMessageDialog(null,"Thread Stop, Bye");
   return;//This will make thread stop
  }
  else if(temp.equals("1"))
  {
   currentValue=currentValue+1;
   JOptionPane.showMessageDialog(null,"Please stop me, i'm tired\ncurrentValue will add one");
  }
  else
  {
   JOptionPane.showMessageDialog(null,"I don't know your input");
  }
 }
}

public static void main(String[]args)
{
 //Create a thread by create StopThread object
 StopThread a=new StopThread();

 //run thread
 a.run();
}
}

***********************************************
JUST COMPILE AND EXECUTE IT
***********************************************

Create thread in java

Create thread in java

COMPLETE SOURCE CODE FOR CreateThread.java

public class CreateThread implements Runnable
{
   //all thread implementation will be put in run method
   public void run()
   {
       //Print hi
       System.out.println("HI");
   }
 
   public static void main(String[]args)
   {
       //Create thread by create CreateThread object
       CreateThread a=new CreateThread();
     
       //run the thread
       a.run();
   }
}

JUST COMPILE AND EXECUTE IT