How to get JFrame object movement in another class

Question

So, I have a class Window which extends JFrame, which is the larger window.

Then I have class MathematicalFunvtions which also extends JFrame, which is the smaller window.

I want to combine them together in another class "Test" so they work together.

public static void main(String args[]) {       
    Window mainwindow;
    mainwindow = new Window();
    mainwindow.setVisible(true);


    MathematicalFunctions functions;
    functions = new MathematicalFunctions(mainwindow);
}

My way to do this is to give a reference of Window object as an argument to MathematicalFunctions and let it do the work.

1. Question is... is it a good way of programming things?

2. When I send mainwindow to functions I would like to know inside that object, when main window is moved... so this object can track it and adjust to so they are always together.

Answer 1

I didnt give up on research and finally i get it... i put this code in constructor of MathematicalFunctions:

mainwindow.addComponentListener(new java.awt.event.ComponentAdapter() {
        @Override
        public void componentMoved(java.awt.event.ComponentEvent evt) {
            GlowneComponentMoved(evt);
        }
    });

//and the listener....
private void GlowneComponentMoved(ComponentEvent evt) 
{
      this.setLocation( (Okno_Glowne.getX()+ Okno_Glowne.getWidth()+10), Okno_Glowne.getY());   
}

and it works how it should be. Every time i move bigger window, the small one follows :)

Whats more... Also Ive made MathematicalFunction class JDialog extension

public class MathematicalFunctions extends javax.swing.JDialog

and the test class looks like before

public static void main(String args[])
{

   oknoo mainwindow;
   mainwindow = new oknoo();
   mainwindow.setVisible(true);


   MathematicalFunctions funkcje;
   funkcje = new MathematicalFunctions(OknoGlowne);
}

;)