[Java] Creating thread

Creating thread

- There are two way to create a thread

1) By extending Thread class

2) By implementing Runnable interface

1. Runnable interface

- Runnable interface have only one method named run()

1) run()

- It is used to perform action for a thread

2. Starting a thread

1) start()

- It is used to start a newly created thread

- It performs following task

a. A new thread starts(with new callstack)

b. The thread moves from New State to the Runnable state

c. When the thread gets a chance to execute, its target run() mehtod will run

3. By extending Thread class

public class ByExtending extends Thread{ public void run(){ System.out.println("Thread is running"); } public static void main(String[] args){ ByExtending t1 = new ByExtending(); t1.start(); } }

4. By implementing Runnable interface

public class ByImplement implements Runnable{ public void run(){ System.out.println("Thread is running"); } public static void main(String[]args){ ByImplement m1 = new ByImplement(); Thread t1 = new Thread(m1); t1.start(); } }  

- If you are not extending the Thread class, your class object would not be treated as a thread object

- you need to explicitely create Thread class object