Java isAlive() Example

 class UserDefineThread extends Thread 
  { 
     UserDefineThread(String name) 
     { 
         super("User Define Thread :"); 
         start(); 
     } 
         public void run() 
          { 
           try 
              { 
                 for(int loop_indx = 0; loop_indx < 4; loop_indx++) 
                  { 
                          System.out.println((Thread.currentThread()).getName()+"Here's The Thread..."); 
                          Thread.sleep(1000); 
                      } 
               } 
                     catch (InterruptedException e1) {} 
                        System.out.println((Thread.currentThread()).getName() + "Finshing..."); 
          } 
  } 
                      class JavaExampleisAlive 
                      { 
                         public static void main(String as[]) 
                          { 
                             UserDefineThread ThrdOne = new UserDefineThread("First"); 
                             UserDefineThread ThrdTwo = new UserDefineThread("Second"); 
                             UserDefineThread ThrdThree = new UserDefineThread("Third"); 
                             UserDefineThread ThrdFour = new UserDefineThread("Fourth"); 
                             System.out.println(ThrdOne.isAlive()); 
                               try 
                          { 
                                       ThrdOne.join(); 
                                       ThrdTwo.join(); 
                                       ThrdThree.join(); 
                                       ThrdThree.join(); 
                                  } 
                               catch (InterruptedException e2) {} 
                                       System.out.println(ThrdOne.isAlive()); 
                         } 
                     }