Multi threading get state in Java

 

 // ABC class implements the interface Runnable  

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());  

}  

  

}