http://img390.imageshack.us/img390/7571/errwe3.png

I compiled the program fine but when I try to execute it, I get the
error above.

Program source code:
//---------------------------------------------
package Default;

public class Test {
    public static void main(String[] args) {
        System.out.print("Hello.\n");
        System.out.println("How are you?");
        System.out.print("I\tam\twell.");
    }
}
//---------------------------------------------

How come it is having these errors?