one more thread

[srilatha annepu]

Thread t = new Thread(this);
t.start(); (when used in static context we get a compile time error)
(when used in a method it runs fine)
but i read some where that Thread constructor has no constructor like Thread(this) is it true if so why is the method runnig fine.

[Swapnil Trivedi]

Hi:
I guess the reason for compilation error in Static context is that, The static methods don't have "this" reference. Since the static members of a class are not associated with any object instead they are of class only. hence, they can't have "this" reference.

Whereas when u call it in a non static method, u can easily pass "this" to the threads constuctor. As that methods must have "this" reference.

About the threads Constructor, I can't say much until I see the code...If "this" is refering to a runnable target then u can surely pass it in threads constructor...



Regards
swapnil

[Asha Pathik]

Hi,

I suppose you are writing the code somewhat like this.

public class Mythread extends Thread
{
public static void main(String [] args)
{
Mythread t= new Mythread();
t.createInstance();
}

public void createInstance()
{
Thread newT= new Thread(this);
newT.start();
}
}    

i.e. the class that you have declared is extending the "Thread" class or it is implementing the Runnable interface. In that case it is perfectly legal to write this Thread newT= new Thread(this); beacuse the "this" in the above code refers to your class and in the "Thread" class we have a constructor that takes a Thread argument or Runnable target.

Hope that helps
Asha

[srilatha annepu]

sorry i misread
it says that there is no this variable in static main method to pass to the thread constructor.any way discussing with u cleared my doubt and also understand it clearly.thanks