Thread - Método de isntância join()

class JoinRunnable implements Runnable {
	int cont = 0;
	public void run() {
		for(int i = 0; i < 10; i++) {
			cont++;
			System.out.println("" + i + " " + Thread.currentThread().getName());
		}
	}
}

class ThreadTesteJoin {
	public static void main(String[] args) {
		JoinRunnable sr = new JoinRunnable();
		Thread t1 = new Thread(sr);
		t1.start();
		Thread t2 = new Thread(sr);
		t2.start();
		Thread t3 = new Thread(sr);
		t3.start();
		
		for(int i = 0; i <10; i++) {
			System.out.println("main: " + i);	
		}
		
		try{
			t1.join();
			t2.join();
			t3.join();
		} catch(InterruptedException e) {}
	}
}