Runtime Errors

[Tony Virdee]

Hi all, whilst studying for the SCJP, I would like to ask is there a specific list of Runtime errors?
For example:
A)Restarting a dead thread
B)Attempt to access an array element outside the size of the array?
Thank you
Tony

[Roan Nicolas]

A) You can not restart a dead thread
B) You get an ArrayIndexOutOfBoundsException when you attempt to access an array element outside the size of the array.
Cheers!

Hi all, whilst studying for the SCJP, I would like to ask is there a specific list of Runtime errors?
For example:
A) Restarting a dead thread
B) Attempt to access an array element outside the size of the array?
Thank you
Tony

[ February 03, 2003: Message edited by: Roan Nicolas ]

[Valentin Crettaz]

The following code shows that once a thread has died, there is no way to restart it.

public class Test extends Thread {
    public static void main(String[] args) throws Exception {
        Test t = new Test();
        t.start(); // start the thread
        t.join();  // wait for it to die
        t.start(); // start it again
    }
    public void run() {
        System.out.println("running...");
    }
}

The string "running..." is only output once which clearly shows that the thread has only been started once.

[Sarma Lolla]

Why are we not getting IllegalThreadStateException when we are calling the start method second time on this thread?

[Michelle Joe]

The thread has died. join() means "Waits for this thread to die"
So you won't get the mentioned Exception unless you change your code as follows:-
public static void main (String [] args) throws Exception {
Test t = new Test();

t.start();// start the thread
t.start();// start it again
t.join();// wait for it to die
}
[ February 04, 2003: Message edited by: Michelle Joe ]

[Dan Culache]

you can find more here:
Join method on thread