Help me with my different classes for Dialog/Listener problem

Question

Class TodSource
//bunch of code
bEdit.addActionListener(new EditUrl(this));
//more code
OTHER classes
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import java.applet.Applet;
public class EditUrl implements ActionListener{
     Frame OriginalOwner;
     EditUrl(Frame TodSourceFrame){
     OriginalOwner = TodSourceFrame;     
     actionPerformed(ActionEvent e) {
     new EditDialog(OriginalOwner, "Enter URL");
public class EditDialog extends Dialog{
     EditDialog(Frame OriginalOwner, String title) {
     super(OriginalOwner, title, true);
     addWindowListener(new CloseCross());
     setLayout(new FlowLayout());
setSize(250, 150);
     setResizable(false);
     show();
class CloseCross extends WindowAdapter {
     public void windowClosing(WindowEvent event){
          dispose();
when i compile i get this error
C:\Documents and Settings\Administrator\Desktop\Java Ref>javac TodSource.java
.\EditUrl.java:18: invalid method declaration; return type required
actionPerformed(ActionEvent e) {
^
.\EditUrl.java:28: class EditDialog is public, should be declared in a file name
d EditDialog.java
public class EditDialog extends Dialog{
^
.\EditUrl.java:8: EditUrl should be declared abstract; it does not define action
Performed(java.awt.event.ActionEvent) in EditUrl
public class EditUrl implements ActionListener{
^
.\EditUrl.java:54: cannot resolve symbol
symbol : method dispose ()
location: class CloseCross
dispose();
^
4 errors
hm, anyone can understand the problem

Answer 1

hi again,
sorry it takes such a long time
1. dispose() is a method normally used by frames, windows and so on
this method just only kills the frame, give the memory this frame used back to the system and makes the frame undisplayable.
So since i do not know what you want to dispose i cannot help you
2. actionperformed()
It works the following way:
every class implementing the interface ActionListener has to implement the method actionPerformed(ActionEvent e)
if you start the program you have to add this actionlistener to a graphiccomponent which can trigger an action(like buttons)
here a short example
import java.awt.*;
import java.awt.event.*;
public class Example extends Frame implements ActionListener {
public Example(){
   Button b = new Button("I am a button");
   b.addActionListener(this); // this will add our actionListener to this button
   b.setActionCommand("DoAnything"); // we need it, if we define more buttons, which uses the same listener
   add(b); // adding the button to our frame
public void actionPerformed(ActionEvent e){
if(e.getActionCommand().equals("DoAnything"))
    // insert here what you want to do
test it out