//PROGRAM 12-7
class MyThread implements Runnable {
  private Thread t;
  private int n;
    
  MyThread(String nama, int n) {
    t = new Thread(this, nama);
    this.n = n;
  }
  
  public void run() {
    try {		
      for (int i=0; i<n; i++) {
        System.out.println("Thread " + t.getName() + 
          ": detik ke-" + (i+1));
        Thread.sleep(1000);      
      }
      System.out.println("Thread " + t.getName() + 
        " selesai...");
    } catch (InterruptedException ie) {
      System.out.println(ie.getMessage());
    }
  }
  
  public void start() {
    t.start();	
  }
  
  public Thread getThread() {
    return t;
  }  
}

class DemoIsAliveJoin {       
  public static void main(String[] args) 
    throws InterruptedException {     
    
    System.out.println("Thread utama dijalankan\n");
    
    MyThread t1 = new MyThread("pertama", 2);
    MyThread t2 = new MyThread("kedua", 3);
    MyThread t3 = new MyThread("ketiga", 4);   
    
    t1.start();
    t2.start();
    t3.start();

    // pada saat thread t1, t2, dan t3 aktif
    System.out.println("t1.getThread().isAlive() : " + 
      t1.getThread().isAlive());
    System.out.println("t2.getThread().isAlive() : " + 
      t2.getThread().isAlive());
    System.out.println("t3.getThread().isAlive() : " + 
      t3.getThread().isAlive());
    System.out.println();
    
    // menunggu sampai thread t1, t2, dan t3 selesai dieksekusi
    t1.getThread().join();
    t2.getThread().join();
    t3.getThread().join();
    
    // setelah thread t1, t2, dan t3 selesai
    System.out.println();
    System.out.println("t1.getThread().isAlive() : " + 
      t1.getThread().isAlive());
    System.out.println("t2.getThread().isAlive() : " + 
      t2.getThread().isAlive());
    System.out.println("t3.getThread().isAlive() : " + 
      t3.getThread().isAlive());
    
    System.out.println("\nThread utama selesai");
  } 
}