Java Thread setPriority() method

The setPriority() method of thread class is used to change the thread's priority. Every thread has a priority which is represented by the integer number between 1 to 10.

Thread class provides 3 constant properties:

1. public static int MIN_PRIORITY: It is the maximum priority of a thread. The value of it is 1.
2. public static int NORM_PRIORITY: It is the normal priority of a thread. The value of it is 5.
3. public static int MAX_PRIORITY: It is the minimum priority of a thread. The value of it is 10.

We can also set the priority of thread between 1 to 10. This priority is known as custom priority or user defined priority.

Syntax

Parameter

a: It is the priority to set this thread to.

Return

It does not return any value.

Exception

IllegalArgumentException: This exception throws if the priority is not in the range MIN_PRIORITY to MAX_PRIORITY.

SecurityException: This exception throws if the current thread cannot modify this thread.

Example 1: Maximum Priority Thread

Output:

Priority of thread is: 10

Example 2: Minimum Priority Thread

Output:

Priority of thread is: 1

Example 3: Normal Priority Thread

Output:

Priority of thread is: 5

Example 4: User define Priority Thread

Output:

Priority of thread t1 is: 4
Priority of thread t2 is: 7
running...

Example 5: When priority is greater than 10

Output:

Exception in thread "main" java.lang.IllegalArgumentException
	at java.lang.Thread.setPriority(Thread.java:1089)
	at JavaSetPriorityExp5.main(JavaSetPriorityExp5.java:13)