Thread Priority in Advanced Java Programming

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For Executing a Program java Contains a Scheduler which Executes the Programs of java on the behalf of Priorities and because a Process or can Execute only one Thread at a time and the Priority of a Thread will determine which Thread will be Executed now and by default all the Threads have a Same Priorities. but if a Thread has a Higher Priority then this will be Executed First and then after other lower Priorities Thread will be Executed. Generally JAVA Provided us three types of Priorities those are MIN_ Priority , Max-Priority and Normal_ Priority They are used as.

1) MAX_PRIORITY
2) NORM_PRIORITY
3) MAX_PRIORITY

In this Minimum Priority of a thread has value 0 and Normal Priority has value 5 and Maximum Priority has a value 10.

The following example creates a new thread and starts it running:

/* =========================================================== File Name : ThreadPriority.java WebSite : http://javaproglang.blogspot.in/ Facebook : https://www.facebook.com/AdvanceJavaProgramming Twitter ID : https://twitter.com/AdvanceJava Created By : Bintu Chaudhary =========================================================== */ import java.io.*; class A extends Thread { public void run() { System.out.println("Thread_A Started"); for(int i=1;i<=5;i++) { System.out.println("\tFrom Thread A : I=" +i); } System.out.println("Exit from A"); } } class B extends Thread { public void run() { System.out.println("Thread_B Started"); for(int j=1;j<=5;j++) { System.out.println("\tFrom Thread B : J=" +j); } System.out.println("Exit from B"); } } class C extends Thread { public void run() { System.out.println("Thread_C Started"); for(int k=1;k<=5;k++) { System.out.println("\tFrom Thread C : K=" +k); } System.out.println("Exit from C"); } } class ThreadPriority { public static void main(String arg[]) { A Thread_A=new A(); B Thread_B=new B(); C Thread_C=new C(); Thread_C.setPriority(Thread.MAX_PRIORITY); Thread_B.setPriority(Thread_A.getPriority()+1); Thread_A.setPriority(Thread.MIN_PRIORITY); System.out.println("Start Thread_A"); Thread_A.start(); System.out.println("Start Thread_B"); Thread_B.start(); System.out.println("Start Thread_C"); Thread_C.start(); System.out.println("Exit the main Thread."); } }

The above code will be stored in the file called ThreadPriority.java, which on compilation will crate a class file called ThreadPriority.class. Now compile this file using below commands in the DOS mode:

C:\>jdk1.4\bin>javac ThreadPriority.java
C:\>jdk1.4\bin>java ThreadPriority

"Output of ThreadPriority.class"

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MultiThreading

Thread Life Cycle	Main Thread
Creating A Thread	Thread Priority
Extending The Thread Class	Writing Applets With Threads