Java threadt

class LastThread extends Thread{

LastThread(){
/*konstruktor*/

}

public void run(){

int i;
for(i=0; i<=10;i++){
System.out.println("proses LastThread");
try{
sleep(1000);
}
catch(Exception e){
e.printStackTrace();
}

}

}

}

class NewThread implements Runnable{

Thread t;

NewThread(){
/*konstruktor*/
t = new Thread(this);
t.start();
}

public void run(){

int i;
for(i=0; i<=10;i++){
System.out.println("proses NewThread");
try{
t.sleep(1000);
}
catch(Exception e){
e.printStackTrace();
}

}

}

}

class CobaThread{

public static void main(String[] args) {

LastThread lt = new LastThread();

lt.start();

NewThread nt = new NewThread();

}

}