Illegela thread operation...?

Hello,

I have a class like that:

class Sampleimplements Runnable{

privateint x = 0;

publicsynchronizedvoid run(){

for (int i=0;i<10;i++){

try{

Thread.sleep(100);

}catch (InterruptedException ex){

}

x++;

System.out.println(Thread.currentThread().getName() +" : " + x);

}

}

}

And I consume this class like that:

Sample s =new Sample();

Thread t1 =new Thread(s);

t1.setName("First");

Thread t2 =new Thread(s);

t2.setName("Second");

System.out.println("STARTING");

t1.start();

t2.start();

t2.join();

System.out.println("END");

When I execute this code, I sometimes get this error:

java.lang.IllegalThreadStateException

at java.lang.ThreadGroup.add(ThreadGroup.java:846)

at java.lang.Thread.start(Thread.java:596)

What is the wrong with the threads that I create?

Thanks in advance...

[1841 byte] By [xyzta] at [2007-11-26 20:00:06]