Re: Applet - Creating new objects from a Button Listener

From:
SadRed <cardinal_ring@yahoo.co.jp>
Newsgroups:
comp.lang.java.programmer
Date:
22 Apr 2007 16:31:18 -0700
Message-ID:
<1177284678.892920.14890@y80g2000hsf.googlegroups.com>
On Apr 23, 7:20 am, theneb <onetwof...@gmail.com> wrote:

Hello everyone, I'm attempting to create JComponents from when a
button is clicked. However I'm assuming I'm missing something? (Or
it's not possible)

This is some quick prototype code which shows my intentions.

import java.awt.*;
import javax.swing.*;
import java.applet.*;
import java.awt.event.*;
import java.util.*;

public class myApplet extends Applet implements ActionListener{

        private JPanel buttonPanel;
        private HashMap<String,testButton> buttons;

        private testButton myButton, secondButton, thirdButton;

        public void init(){
                buttonPanel = new JPanel();
                buttons = new HashMap<String,testButton>();
                buttons.put(String.valueOf(buttons.size()),new testButton());
                buttonPanel.add(buttons.get(String.valueOf(buttons.size()-1)));
                add(buttonPanel);
        }//end init

        public void start(){
                System.out.println("START");
        }

        public void actionPerformed(ActionEvent event) {
                System.out.println("Action");
        }

private class testButton extends JButton implements ActionListener{

        public testButton(){
                setText("Button "+buttons.size());
                addActionListener(this);
        }

        public void actionPerformed(ActionEvent event) {
                System.out.println("Adding New Button");
                buttons.put(String.valueOf(buttons.size()),new testButton());
                buttonPanel.add(buttons.get(String.valueOf(buttons.size()-1)));
        }

}
}//end myApplet

Example here:http://www.theneb.co.uk/applet-test/test.html

Cheers


import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;

public class MyApplet extends JApplet{
  private JPanel buttonPanel;
  private HashMap<String,TestButton> buttons;
  private TestButton myButton, secondButton, thirdButton;

  public void init(){
    buttonPanel = new JPanel();
    buttons = new HashMap<String, TestButton>();
    buttons.put(String.valueOf(buttons.size()), new TestButton());
    buttonPanel.add(buttons.get(String.valueOf(buttons.size()-1)));
    getContentPane().add(buttonPanel, BorderLayout.CENTER);
  }//end init

  private class TestButton extends JButton implements ActionListener{

    public TestButton(){
      setText("Button " + buttons.size());
      addActionListener(this);
    }

    public void actionPerformed(ActionEvent event) {
      System.out.println("Adding New Button");
      buttons.put(String.valueOf(buttons.size()), new TestButton());
      buttonPanel.add(buttons.get(String.valueOf(buttons.size() -
1)));
      buttonPanel.revalidate();
    }
  }
}//end MyApplet

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