setPriority() method of thread

setPriority() method is used to set the priority of a thread. A priority can be set from number 1 to 10. Java provides three constants to represent priority.

Syntax

public final void setPriority(int priority)

Three constants which are used for priority are:
(i) public static in MIN_PRIORITY :- Its value is 1 and denotes minimum priority.
(ii) public static int NORM_PRIORITY:- It is default priority. Its value is 5.
(iii) public static int MAX_PRIORITY:- It is maximum priority. Its value is 10.

setPriority() raises following exceptions:
(i) IllegalArgumenttException :- If priority is not between 1 (MIN_PRIORITY) and 10 (MAX_PRIORITY) then this exception is raised.
(ii) SecurityException :- This exception is raised when priority can not be modified.

Example

 public class  Exp1  extends  Thread {
    public void  run() {
        System.out.println("Priority of "   + Thread.currentThread().getName() + " is " + Thread.currentThread().getPriority());
    }
    public static void  main(String args[]) {
        Exp1 t0 =   new  Exp1();
        Exp1 t1 =   new  Exp1();
        Exp1 t2 =   new  Exp1();
        Exp1 t3 =   new  Exp1();
        
        
        t0.setPriority(Thread.MAX_PRIORITY);
        t1.setPriority(Thread.NORM_PRIORITY);
        t2.setPriority(Thread.MIN_PRIORITY);
        t3.setPriority(7);
        
        t0.start();
        t1.start();
        t2.start();
        t3.start();
    }
}

Output

Output will vary in each run

Priority of Thread-2 is 1
Priority of Thread-0 is 10
Priority of Thread-3 is 7
Priority of Thread-1 is 5

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