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java.util.concurrent.locks package program


Program:-

 import java.util.concurrent.*;

import java.util.concurrent.locks.*;

class Display

{

    ReentrantLock l=new ReentrantLock();

    public void wish(String name)

     {

      l.lock();

       for(int i=1;i<=5;i++){

        System.out.print("Good morning: ");

         try{Thread.sleep(500);}catch(Exception e){}

         System.out.println(name);

        }

     l.unlock();

     }

}

class ThreadDemo2 extends Thread

{

   Display d;

   String name;

   ThreadDemo2(Display d, String name)

   {

      this.d=d;

      this.name=name;

   }

 public void run()

  {

    d.wish(name); 

   }

 public static void main(String args[])

 {

    Display d=new Display();

   ThreadDemo2 f1=new ThreadDemo2(d,"dhoni");

   ThreadDemo2 f2=new ThreadDemo2(d,"shiva");

    f1.start();

    f2.start();

    }

}



import java.util.concurrent.*;

import java.util.concurrent.locks.*;

class ThreadDemo3 extends Thread

{

     ThreadDemo3(String name)

       {

         super(name);

        }

   static ReentrantLock l=new ReentrantLock();

   public void run()

    {

      if(l.tryLock())

       {

           System.out.println(Thread.currentThread().getName()+" Get the lock");

          try{Thread.sleep(500);}catch(Exception e){}

          l.unlock();

       }

      else

       System.out.println(Thread.currentThread().getName()+" won't get the lock"); 

   }

  public static void main(String args[])

   {

    ThreadDemo3 t1=new ThreadDemo3("Thread1");

    ThreadDemo3 t2=new ThreadDemo3("Thread2");

    t1.start();

    t2.start();


  }

}



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