The
Runnable interface should be implemented by any class whose instances
are intended to be executed by a thread.
Runnable
interface has only one method, i.e., run().
Prototype
of run method is
public void run();
Example
class MyThread implements Runnable{ public void run(){ System.out.println("I am in run method"); } public static void main(String args[]){ MyThread task = new MyThread(); Thread t1 = new Thread(task); t1.start(); } }
Output
I am in run method
Advantages
of creating thread using Runnable as compared to extending Thread
1.
By using runnable, you can create a task, and make number of threads
to call it.
Example
class MyThread implements Runnable{ public void run(){ System.out.println("I am in run method"); } public static void main(String args[]){ MyThread task = new MyThread(); Thread t1 = new Thread(task); Thread t2 = new Thread(task); t1.start(); t2.start(); } }
Output
I am in run method I am in run method
2.
If you create a thread by extending Thread class, then you are not
allowed to extend any other class. Since java doesn't support
multiple inheritance.
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