dendeezen schreef:

Well it does not compile, so one of the Cs is not appropriate.  You have
to have a look at basic class structure.  Did you read a tutorial on
Java?  You cannot define methods /inside/ constructors.  Define them in
the class body, and invoke them in the constructor.  (But then, watch
out for that typical caveat about invoking overridable methods in the
constructors.)

HTH, H.
- --
Hendrik Maryns
http://tcl.sfs.uni-tuebingen.de/~hendrik/
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This is what your code should look like

import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class Test extends JFrame { // Class names should begin with a
capital letter
 Alpha alpha = null;  // Alpha is spelled with a 'ph', not 'f'
 Beta beta = null;  // although not required, you should always
initialize all variables
 Gamma gamma = null;  // instance names should begin with a lowercase
letter

 public Test () {
   alpha = new Alpha(this, null);
   beta = new Beta(this, null, null);
   gamma = new Gamma(this, null);

   alpha.setBeta(beta); // method names should begin with a lowercase
letter, but capitalize all other words.
   beta.setAlpha(alpha);
   beta.setGamma(gamma);
   gamma.setBeta(beta);
 }
}

class Alpha extends JPanel implements ActionListener {
 Test test = null;
 Beta beta = null;

 public Alpha(Test test, Beta beta) {
   this.test = test;
   this.beta = beta;
 }

 public void setBeta(Beta beta) {
   this.beta = beta;
 }

 public void actionPerformed(ActionEvent actionEvent) {
   // this method is here because this class implements
ActionListener
 }
}

class Beta extends JPanel implements ActionListener {
 Test test = null;
 Alpha alpha = null;
 Gamma gamma = null;

 public Beta(Test test, Alpha alpha, Gamma gamma) {
   this.gamma = gamma;
   this.test = test;
   this.alpha = alpha;
 }

 public void setAlpha(Alpha alpha) {
   this.alpha = alpha;
 }

 public void setGamma(Gamma gamma) {
   this.gamma = gamma;
 }

 public void actionPerformed(ActionEvent actionEvent) {
   // this method is here because this class implements
ActionListener
 }
}

class Gamma extends JPanel {
 Test test = null;
 Beta beta = null;

 public Gamma(Test test, Beta beta) {
   this.test = test;
   this.beta = beta;
 }
 public void setBeta(Beta beta) {
   this.beta = beta;
 }
}