java | thread priority and volatile use

java | thread priority and volatile use

//Example of Thread priorities

//MIN_PRIORITY=1

//NORMAL_PRIORITY=5

//MAX_PRIORITY=10

class NewThread implements Runnable

{

int click=0;//a local variable of each thread to be incremented

Thread t;

boolean running=true;

NewThread(int p )

{

t=new Thread(this);

t.setPriority(p);                             //setting priority

}

public void run()                         //overridden method

{

while(running)

{

click++;                                       //increment of click variable by their thread

}

}

public void stop()//overridden method

{

running=false;

}

}

class ThreadDemo

{

public static void  main(String ar[])//main is a thread which start very first

{

// creating three threads

NewThread ob1=new NewThread(10);         //highest priority

NewThread ob2=new NewThread(5);          //normal priority

NewThread ob3=new NewThread(1);          //minimum priority

ob1.t.start();

ob2.t.start();

ob3.t.start();

//waiting for thread to be completed

try{

Thread.sleep(1000);suspending main thread for 1 sec  

}

catch(InterruptedException e)

{

System.out.println("Inter");

}

// stoping all threads

ob1.t.stop();

ob2.t.stop();

ob3.t.stop();

try{

System.out.println("Waiting fro threads to be finished");

ob1.t.join();

ob2.t.join();

ob3.t.join();

}

catch(InterruptedException e)

{

System.out.println("Inter");

}

//output of click variable for each thread

System.out.println("total click of ob1= "+ob1.click);

System.out.println("total click of ob2= "+ob2.click);

System.out.println("total click of ob3= "+ob3.click);

System.out.println("Main Thread Exitting ");

}

}

//volatile: sharing of variable memory between threads.

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