Java Create Thread Example

Java Thread Examples

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• Java Create Thread Example
• Java Create Thread using Runnable Interface Example
• Java Create Thread with Lambda Expression
• JJava Create Multiple Threads Example
• Java Thread sleep() Method Example
• Java Thread join() Method Example
• Java Thread interrupt() Method Example
• Java Thread isAlive() Method Example
• Java Thread setName() Method Example
• Java Thread setPriority() Method Example

Java provides two ways to create a thread programmatically.

1. Implementing the Runnable interface.
2. Extending the Thread class.

In the previous example, we have seen Java Create Thread using Runnable Interface Example.

In this example, we will learn how to create a thread using a Thread class.

Java Create Thread Example

Let's create a new thread simply by extending your class from java.lang.Thread and overriding it’s run() method.

The run() method contains the code that is executed inside the new thread. Once a thread is created, you can start it by calling the start() method.

Let's demonstrate how to create and start a Thread by extending java.lang.Thread class. 

In this example the main() method is the main thread, we will create and start the WorkerThread in the main thread.

class WorkerThread extends Thread {
     private String anyData;
 
     public WorkerThread(final String anyData) {
          this.anyData = anyData;
     }
 
     @Override
     public void run() {
     for (int i = 0; i < 5; i++) {
          System.out.println("[" + Thread.currentThread().getName() + "] "
          + "[data=" + this.anyData + "] Message " + i);
     try {
         Thread.sleep(200);
     } catch (final InterruptedException e) {
         e.printStackTrace();
     }
   }
}
}


/**
 *  Instantiate a thread by using Thread class.
 *  @author Ramesh fadatare
 **/

public class ThreadExample {
 
    public static void main(final String[] args) {
  
         System.out.println("Thread main started");

         final Thread thread = new WorkerThread("Process data using WorkerThread"); 
         thread.start();
         thread.setName("WorkerThread");
  
         System.out.println("Thread main finished");
    }
}

Output:

Thread main started
Thread main finished
[WorkerThread] [data=Process data using WorkerThread] Message 0
[WorkerThread] [data=Process data using WorkerThread] Message 1
[WorkerThread] [data=Process data using WorkerThread] Message 2
[WorkerThread] [data=Process data using WorkerThread] Message 3
[WorkerThread] [data=Process data using WorkerThread] Message 4