Question

I have a main JFrame that calls a class(A) and that class calls another class (B)
In Class B I need a refrence to main JFrame
How to find that?

Thanks

Answer 1

You can pass a reference of the JFrame to the classes like so

public class SomeFrame extends JFrame {
.
.
.
ClassA classA = new ClassA(arg1, arg2..., this, ...);
.
.
.

In ClassA:

 public class ClassA {
 private JFrame someFrame;
 public ClassA(arg1, arg2... JFrame someFrame,...)
 {
 this.someFrame = someFrame;
 .
 .
 . 
 ClassB classB = new ClassB(arg1, arg2, this.someFrame, ...);
 .
 .
 .

In ClassB:

public class ClassB {
private JFrame someFrame;

public ClassB(arg1, arg2, JFrame someFrame, ...) {
 this.someFrame = someFrame;
 .
 .
 .