The "Thread" Class - Creating Thread Objects With Thread Sub Classes

This section provides a tutorial example on how to create new threads with your own classes extended from the 'Thread' class. You need to override the run() method in your own classes.

The first way to create a new thread in a Java program is to:

Here is a tutorial sample program showing you how to do this:

class HelloThread extends Thread {
   public static void main(String[] a) {
      HelloThread t = new HelloThread();
      t.start();
      System.out.println("Hello world! - From the main program."); 	
   }
   public void run() {
      System.out.println("Hello world! - From a thread.");
      try {
         sleep(1000*60*60);
      } catch (InterruptedException e) {
         System.ut.println("Interrupted.");
      }
   }
}

Output:

Hello world! - From the main program.
Hello world! - From a thread.

A couple of things you should know about this program:

Last update: 2014.

Table of Contents

 About This Book

 Installing JDK 1.8 on Windows

 Execution Process, Entry Point, Input and Output

 Primitive Data Types and Literals

 Bits, Bytes, Bitwise and Shift Operations

 Managing Bit Strings in Byte Arrays

 Reference Data Types and Variables

 StringBuffer - The String Buffer Class

 System Properties and Runtime Object Methods

 Generic Classes and Parameterized Types

 Generic Methods and Type Inference

 Lambda Expressions and Method References

Execution Threads and Multi-Threading Java Programs

 What Are Processes and Threads?

The "Thread" Class - Creating Thread Objects With Thread Sub Classes

 The "Runnable" Interface - Creating Thread Objects with Runnable Objects

 CPU Execution Time Shared by Multiple Threads

 CPU Execution Time Shared by Multiple Threads - Test Output

 Application Data Shared by Multiple Threads

 Application Data Shared by Multiple Threads - Test Results

 interrupt() - Method to Terminate Thread

 ThreadGroup Class and "system" ThreadGroup Tree

 Synchronization Technique and Synchronized Code Blocks

 Deadlock Condition Example Programs

 Garbage Collection and the gc() Method

 Outdated Tutorials

 References

 PDF Printing Version