problems with static referencing non-static methods

[markwaldin]

I am trying to add a keylistener to my program but run into problems referencing non-static methods from main. Here is the jist of it:

class myprogram {

respondToKey instanceofKeyresponse = new respondToKey();

class respondToKey extends keyAdapter {
dosomething;
}
public void main(){
myprograminstance = new myprogram();
myprograminstance.addKeyListener(instanceofKeyresponse);
}
}

This causes an error for referencing a non-static variable from a static context (main) which I would expect. But how go I go about getting the keylistener activated?

Any help would be appreciated.

 

[MarsChelios]

Hi markwaldin,
It would be better for the adding of the KeyListener to be in the constructor of the class

myprogram

, which really should be called

MyProgram

.
In general, the

main (String [] args)

method is used to just get the program running, but not for specific initialization like adding listeners to objects. Since it is specific to the object itself, it should be done in the objects constructor.
Something like this:

public class MyProgram extends Component {
  
  private RespondToKey keyListener = new RespondToKey ();

  public MyProgram () {
    addKeyListener (keyListener);
  }

  public void main (String [] args) {
    MyProgram program = new MyProgram ();
  }

  class RespondToKey extends KeyAdapter {
    //Place Key Event code in here
  }
}

Hope this Helps,
MarsChelios

 

[markwaldin]

thanks so much. Now I understand. Works great.