inner question

[Andrew Parker]

Hi,
Inner class question:
Q.1 Given:
public class MyClass {
public class MyRunnable implements Runnable
{
public static void main(String [] args)
{
(new Thread(new MyRunner())).start();
}
}
How to rectify it? change it to (new Thread(new MyClass().new MyRunner())).start(); ??
Thanks
Andrew

[Dave Vick]

Andrew
A couple of points.
What is the actual question you're asking?
You can't have a static method in a non-static inner class, so you'll have to move your main method to the enclosing class.
To create an instance of the inner class you need to an instacne of the enclosing class first.
This code should do what you'r elooking for:

public class MyClass{
   public static void main(String [] args)
      {
         MyClass.MyRunnable mr = new MyClass().new MyRunnable();
         new Thread(mr).start();
      }
   public class MyRunnable implements Runnable
   {
   }
}

hope that helps

------------------
Dave
Sun Certified Programmer for the Java� 2 Platform

[Andrew Parker]

Sorry,
I missed the void run() method and they should be separated.
Here is what I ask:
public class MyClass
{
public static void main(String [] args)
{
//MyClass.MyRunnable mr = new MyClass().new MyRunnable();
//new Thread(mr).start();
(new Thread(new MyClass().new MyRunnable())).start(); //I want to know whether they are the same.
}
public class MyRunnable implements Runnable
{
public void run(){}
}
}
Thanks for your kind help.

Andrew

[Dave Vick]

Andrew
Yes both ways you have shown will accomplish the same thing - they both create and start a MyRunnable object. The major difference is that in the first way you'll actually have a reference to a MyRunnable object that you can refer to later in your code. The second way you wont.
hope that helps
------------------
Dave
Sun Certified Programmer for the Java� 2 Platform

[Andrew Parker]

Thanks a lot, Dave.
I got it.
Regards
Andrew