Thread: start() and run() defined, which one happens?

[Zac Roberts]

I saw something kindof like this in the JQ+ Exam 3, anyone understand why the run method does not run?

public class ThreadStarter extends Thread {
 public static void main(String args[]) {
  ThreadStarter t = new ThreadStarter();
  t.start();
 }
 public void run() {
  System.out.println("Run Method");
 }
 public void start() {
  System.out.println("Start Method");
 }
}

This code prints "Start Method". But if I comment out the start method, It prints "Run Method".

[Roy Ben Ami]

the reason is the u overide the start method in your new class.
so the real start method in thread (the one that supposed to start the thread and run it) is not getting called.

[Shivaji Marathe]

Try to call the the start method of the ancestor like this and you shall see otputs from both the println statements

  
public class Foo extends Thread {
public static void main(String args[])
{  Foo t = new Foo();
t.start();
}
public void run() {
System.out.println("Run Method");
}
public void start() {
System.out.println("Start Method");
super.start();
}
}

[Zac Roberts]

Thanks to both of you... good explanations. Now, lets hope I get that question on the exam!