Wsrtjtyk

So I have created two classes, MyThread1 and MyThread2, which are extending the Thread class.

public class MyThread1 extends Thread{



    public void run() {

        System.out.println("MyThread1 output");

    }

}



public class MyThread2 extends Thread{



    public void run() {

        System.out.println("MyThread2 output");

    }

}



public class Main {



    public static void main(String args) {



        MyThread1 mt1 = new MyThread1();

        MyThread2 mt2 = new MyThread2();



        mt1.setPriority(10);



        mt1.start();

        mt2.start();

        System.out.println("aaaaaa");

    }

}

Now according to my program MyThread1 should run before MyThread2 because I have set its priority to 10, but still I am getting this output:

Output:

Main thread output.                                                      

MyThread2 output.                                                             

MyThread1 output.   

Please someone tell me why Mythread2 is printed first then MyThread1 even thought MyThread1 has high priority.

Regarding your problem, I guess you don't save your code before executing. Make sure it's saved and execute again.

When two thread 1 & 2 are created, their priorities inherit from main thread. Let says if main thread has priority is 5, they will be 5.
When you set priority of thread 1 is 10 (max priority). The result should be:

Thread 1....

Thread 2 or Main thread ( because of same priority)

I have attached my sample code:

     Runnable r1 = new Runnable() {

        public void run() {

            System.out.println("Runnable 1");

        }

    };

    Runnable r2 = new Runnable() {

        public void run() {

            System.out.println("Runnable 2");

        }

    };



    Thread t1 = new Thread(r1);

    Thread t2 = new Thread(r2);

    t2.setPriority(Thread.MAX_PRIORITY);

    t1.start();

    t2.start();



    System.out.println("Main thread");

Output :

Runnable 2

Runnable 1

Main thread

Just adding on the @htpvl,

In Java, Thread has its own int type variables for the priority values
as (MAX_PRIORITY, NORM_PRIORITY, MIN_PRIORITY)

you can make use of that as @htpvl explained.

You can also play around its value like increasing or decreasing.

For Example: Lets say you are having 5 thread, and you want to assign the priority accordingly, then what you can do is:

// Creating instances

Thread t1 = new Thread(r1);

Thread t2 = new Thread(r2);

Thread t3 = new Thread(r3);

Thread t4 = new Thread(r4);

Thread t5 = new Thread(r5);



// Do check the value of Thread.MAX_PRIORITY, and you can play around it

System.out.println("MAX PRIORITY IS: " + Thread.MAX_PRIORITY); // On Mac it prints : 10

System.out.println("NORMAL PRIORITY IS: " + Thread.NORM_PRIORITY); // On Mac it prints : 5

System.out.println("MIN PRIORITY IS: " + Thread.MIN_PRIORITY); // On Mac it prints : 1



// Set the priority (according to your PRIORITY int values)

t1.setPriority((int)Thread.MAX_PRIORITY-1);

t2.setPriority(Thread.MAX_PRIORITY);

t3.setPriority(Thread.MIN_PRIORITY);

t4.setPriority((int)Thread.NORM_PRIORITY +1);

t5.setPriority((int)Thread.NORM_PRIORITY +2);



// Starting the threads [Execution]

t1.start();

t2.start();

t3.start();

t4.start();

t5.start();

Output for Thread Sequence:

t2

t1

t5

t4

t3