Different ways to create thread in Java

What are the different ways to create a thread in Java?

In Java, we can create a thread in two different ways:

1- By extending Thread class.

2- By implementing Runnable interface.

By extending Thread class

• Extend Thread class to define a thread in Java.
• Override the run method and define task inside the run method.
• Call start method on thread object to start the thread.

package com.javainstance;

/**

 * @author javainstance

 *

 */

public class Task extends Thread {

public void run() {

for (int i = 0; i < 3; i++) {

System.out.println("Thread in doing task : " + i);

}

}

public static void main(String[] args) {

Task task = new Task();

task.start();

}

}

By implementing Runnable interface

• Create a class and implement Runnable interface.
• Implementing runnable interface force you to implement the run method.
• Define task inside the run method.
• Create thread object by passing runnable object as an argument
• Call start method on thread object to start the thread.

package com.javainstance;

/**

 * @author javainstance

 *

 */

public class Task implements Runnable {

@Override

public void run() {

for (int i = 0; i < 3; i++) {

System.out.println("Thread in doing task : " + i);

}

}

public static void main(String[] args) {

Task task = new Task();

Thread thread = new Thread(task);

thread.start();

}

}

Creating thread using anonymous class

Sometimes it is handy to create a thread using an anonymous class when the thread is just to run a method.In below example thread is created using an anonymous class.

package com.javainstance;

/**

 * @author javainstance

 *

 */

public class Task {

public static void main(String[] args) {

Thread thread = new Thread(new Runnable() {

@Override

public void run() {

for (int i = 0; i < 3; i++) {

System.out.println("Thread in doing task : " + i);

}

}

});

thread.start();

}

}

Output is same above 3 programs:

Thread in doing task : 0

Thread in doing task : 1

Thread in doing task : 2

Synchronization in Java -  Synchronized keyword

Give your suggestion in comments.

If you like the post Share with your friends on social network.

Follow us: www.facebook.com/javainstance