Thread run() Method in Java

Chapter: Thread Last Updated: 19-08-2017 08:16:02 UTC

Program:

            /* ............... START ............... */
                
public class JavaThreadRunExample implements Runnable {
	Thread t;

	JavaThreadRunExample() {
		t = new Thread(this, "Admin Thread");
		System.out.println("thread  = " + t);
		t.start();
	}

	public void run() {
		System.out.println("Inside run()function");
	}

	public static void main(String args[]) {
		new JavaThreadRunExample();
	}
}
                /* ............... END ............... */
        

Output

thread  = Thread[Admin Thread,5,main]
Inside run()function

Notes:

• run() method is entry point of thread. Execution of thread starts from this method.
• Invoking the run() method from main thread, the run() method goes onto the current call stack rather than at the beginning of a new call stack.
• Syntax : public void run().
• The java.lang.Thread.run() method is called if this thread was constructed using a separate Runnable run object, else this method does nothing and returns.
• The start() method will cause the JVM to spawn a new thread and make the newly spawned thread execute run().
• Even if programatically we are not creating any thread, For every application, O.S will create a default thread to execute its code with CPU.
• Calling run method directly will make that run method execute in that main thread given by O.S.

Tags

Thread run() Method, Java

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