Java Tutorial/Swing/ButtonModel

Add change listener to Button model

   <source lang="java">

import java.awt.BorderLayout; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.ButtonModel; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; public class Main extends JFrame {

 JButton b = new JButton("Test");
 ButtonModel model = b.getModel();
 public Main() {
   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   model.addChangeListener(new ChangeListener() {
     public void stateChanged(ChangeEvent e) {
       System.out.println("Armed: " + model.isArmed() + " Enabled: "
           + model.isEnabled() + " Pressed: " + model.isPressed());
     }
   });
   getContentPane().add(b, BorderLayout.CENTER);
   pack();
   setVisible(true);
 }
 public static void main(String arg[]) {
   new Main();
 }

}</source>

A default button model

   <source lang="java">

import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.ButtonModel; import javax.swing.DefaultButtonModel; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; public class Main {

 public static void main(String[] args) {
   final JButton ok = new JButton("ok");
   JCheckBox cb = new JCheckBox("Enabled", true);
   cb.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent e) {
       if (ok.isEnabled())
         ok.setEnabled(false);
       else
         ok.setEnabled(true);
     }
   });
   ButtonModel model = new DefaultButtonModel() {
     public void setEnabled(boolean b) {
       if (b)
         System.out.println("Pressed: true");
       else
         System.out.println("Pressed: false");
       super.setEnabled(b);
     }
     public void setArmed(boolean b) {
       if (b)
         System.out.println("Armed: true");
       else
         System.out.println("Armed: false");
       super.setArmed(b);
     }
     public void setPressed(boolean b) {
       if (b)
         System.out.println("Pressed: true");
       else
         System.out.println("Pressed: false");
       super.setPressed(b);
     }
   };
   ok.setModel(model);
   JFrame f = new JFrame();
   f.setLayout(new FlowLayout());
   f.add(ok);
   f.add(cb);
   f.setSize(350, 250);
   f.setLocationRelativeTo(null);
   f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   f.setVisible(true);
 }

}</source>

Model for a JButton: manage only the state of the button

   <source lang="java">

import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.DefaultButtonModel; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; public class ButtonModel {

 public static void main(String[] args) {
   final JButton ok = new JButton("ok");
   JCheckBox cb = new JCheckBox("Enabled", true);
   ok.setBounds(40, 30, 80, 25);
   ok.addChangeListener(new ChangeListener() {
     public void stateChanged(ChangeEvent e) {
       DefaultButtonModel model = (DefaultButtonModel) ok.getModel();
       if (model.isEnabled())
         System.out.println("Enabled: true");
       else
         System.out.println("Enabled: false");
       if (model.isArmed())
         System.out.println("Armed: true");
       else
         System.out.println("Armed: false");
       if (model.isPressed())
         System.out.println("Pressed: true");
       else
         System.out.println("Pressed: false");
     }
   });
   cb.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent e) {
       if (ok.isEnabled())
         ok.setEnabled(false);
       else
         ok.setEnabled(true);
     }
   });
   JFrame f = new JFrame();
   f.setLayout(new FlowLayout());
   f.add(ok);
   f.add(cb);
   f.setSize(350, 250);
   f.setLocationRelativeTo(null);
   f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   f.setVisible(true);
 }

}</source>