怎样触发choice的事件

Question

怎样触发choice中选中的某一项的事件
小妹谢谢了

Answer 1

JRadioButton birdButton = new JRadioButton(birdString);
    birdButton.setMnemonic(KeyEvent.VK_B);
    birdButton.setActionCommand(birdString);
    birdButton.setSelected(true);    JRadioButton catButton = new JRadioButton(catString);
    catButton.setMnemonic(KeyEvent.VK_C);
    catButton.setActionCommand(catString);    JRadioButton dogButton = new JRadioButton(dogString);
    dogButton.setMnemonic(KeyEvent.VK_D);
    dogButton.setActionCommand(dogString);    JRadioButton rabbitButton = new JRadioButton(rabbitString);
    rabbitButton.setMnemonic(KeyEvent.VK_R);
    rabbitButton.setActionCommand(rabbitString);    JRadioButton pigButton = new JRadioButton(pigString);
    pigButton.setMnemonic(KeyEvent.VK_P);
    pigButton.setActionCommand(pigString);    //Group the radio buttons.
    ButtonGroup group = new ButtonGroup();
    group.add(birdButton);
    group.add(catButton);
    group.add(dogButton);
    group.add(rabbitButton);
    group.add(pigButton);    //Register a listener for the radio buttons.
    birdButton.addActionListener(this);
    catButton.addActionListener(this);
    dogButton.addActionListener(this);
    rabbitButton.addActionListener(this);
    pigButton.addActionListener(this);
...
public void actionPerformed(ActionEvent e) {
    picture.setIcon(new ImageIcon("images/" 
                                  + e.getActionCommand() 
                                  + ".gif"));
}

Answer 2

chinButton = new JCheckBox("Chin");
    chinButton.setMnemonic(KeyEvent.VK_C); 
    chinButton.setSelected(true);    glassesButton = new JCheckBox("Glasses");
    glassesButton.setMnemonic(KeyEvent.VK_G); 
    glassesButton.setSelected(true);    hairButton = new JCheckBox("Hair");
    hairButton.setMnemonic(KeyEvent.VK_H); 
    hairButton.setSelected(true);    teethButton = new JCheckBox("Teeth");
    teethButton.setMnemonic(KeyEvent.VK_T); 
    teethButton.setSelected(true);    //Register a listener for the check boxes.
    chinButton.addItemListener(this);
    glassesButton.addItemListener(this);
    hairButton.addItemListener(this);
    teethButton.addItemListener(this);
...
public void itemStateChanged(ItemEvent e) {
    ...
    Object source = e.getItemSelectable();    if (source == chinButton) {
        //...make a note of it...
    } else if (source == glassesButton) {
        //...make a note of it...
    } else if (source == hairButton) {
        //...make a note of it...
    } else if (source == teethButton) {
        //...make a note of it...
    }    if (e.getStateChange() == ItemEvent.DESELECTED)
        //...make a note of it...
    ...
    updatePicture();
}