class ABC implements Runnable

{

public void run()

{

// try-catch block

try

{

// moving thread t2 to the state timed waiting

Thread.sleep(100);

}

catch (InterruptedException ie)

{

ie.printStackTrace();

}

System.out.println("The state of thread t1 while it invoked the method join() on thread t2 -"+ ThreadState.t1.getState());

// try-catch block

try

{

Thread.sleep(200);

}

catch (InterruptedException ie)

{

ie.printStackTrace();

}

}

}

// ThreadState class implements the interface Runnable

public class ThreadState implements Runnable

{

public static Thread t1;

public static ThreadState obj;

// main method

public static void main(String argvs[])

{

// creating an object of the class ThreadState

obj = new ThreadState();

t1 = new Thread(obj);

// thread t1 is spawned

// The thread t1 is currently in the NEW state.

System.out.println("The state of thread t1 after spawning it - " + t1.getState());

// invoking the start() method on

// the thread t1

t1.start();

// thread t1 is moved to the Runnable state

System.out.println("The state of thread t1 after invoking the method start() on it - " + t1.getState());

}

public void run()

{

ABC myObj = new ABC();

Thread t2 = new Thread(myObj);

// thread t2 is created and is currently in the NEW state.

System.out.println("The state of thread t2 after spawning it - "+ t2.getState());

t2.start();

// thread t2 is moved to the runnable state

System.out.println("the state of thread t2 after calling the method start() on it - " + t2.getState());

// try-catch block for the smooth flow of the program

try

{

// moving the thread t1 to the state timed waiting

Thread.sleep(200);

}

catch (InterruptedException ie)

{

ie.printStackTrace();

}

System.out.println("The state of thread t2 after invoking the method sleep() on it - "+ t2.getState() );

// try-catch block for the smooth flow of the program

try

{

// waiting for thread t2 to complete its execution

t2.join();

}

catch (InterruptedException ie)

{

ie.printStackTrace();

}

System.out.println("The state of thread t2 when it has completed it's execution - " + t2.getState());

}

}