How to set priorities for multiple threads in java

Question

How does one set different priorities for different threads on JAVA? Let us assume I have three threads A,B,C..and i want A to be of high priority.. How do I set the priority value in each case? Can I get a sample code for that?

Answer 1

Each thread have a priority. Priorities are represented by a number between 1 and 10. In most cases, thread scheduler schedules the threads according to their priority (known as preemptive scheduling).

There are 3 constant priorities defined in Thread class:

• public static int MIN_PRIORITY
• public static int NORM_PRIORITY
• public static int MAX_PRIORITY

You can use it as follows:

public static void main(String args[]){  
  Test t1 = new Test();  
  Test t2 = new Test();  
  t1.setPriority(Thread.MIN_PRIORITY);  
  t2.setPriority(Thread.MAX_PRIORITY);  
  t1.start();  
  t2.start();  
 }  

But it is not guaranteed because it depends on JVM specification that which scheduling it chooses.

Read more here.

Answer 2

You can just call Thread.setPriority(int) on your thread objects.

The value has to be between Thread.MIN_PRIORITY and Thread.MAX_PRIORITY