Write a java program to multithreading concept.

Write a java program to multithreading concept.

Program Algorithm:

Step 1: Create a class which either extends Thread or implements Runnable.

Step 2: This class itself makes its own object to the thread and calls the start method which will call the run method.

Step 3: Define the run method.

Step 4: Create an object of this class in main and the thread will start automatically as the start is called in its constructor.

Step 5: So we have 2 threads: one which you have made and the other is the main thread running simultaneously.

Program Code:

class ThreadDemo 

{

public static void main(String args[])

{ new NewThread();

try

{

for(int i = 5; i > 0; i--)

{ 

System.out.println("Main Thread: " + i);

Thread.sleep(1000); 

} 

} 

catch (InterruptedException e)

{

System.out.println("Main thread interrupted.");

} 

System.out.println("Main thread exiting.");

}

}

class NewThread implements Runnable 

{ 

Thread t;

NewThread() 

{

t = new Thread(this, "Demo Thread");

System.out.println("Child thread: " + t);

t.start();

}

public void run() 

{

try 

{

for(int i = 5; i > 0; i--)

{ 

System.out.println("Child Thread: " + i);

Thread.sleep(500); 

}

}

catch (InterruptedException e)

{ 

System.out.println("Child interrupted."); 

}

System.out.println("Exiting child thread."); 

}

}

Sample Inputs and Outputs:

Child thread: Thread[Demo Thread,5,main]

Main Thread: 5

Child Thread: 5

Child Thread: 4

Main Thread: 4

Child Thread: 3

CS1031/OOPS Lab CSE/SRM 55/57

Child Thread: 2

Child Thread: 1

Main Thread: 3

Exiting child thread.

Main Thread: 2

Main Thread: 1

Main thread exiting.