Java.Swing.button绑定快捷键的3种办法

1.使用button.setMnemonic方法，例如：jbtRemove.setMnemonic(java.awt.event.KeyEvent.VK_D);     

注意使用这个方法只能用alt+d才可以使用快捷键，可以看作是绑定了热键。

2.使用button.registerKeyboardAction()方法，这里可以用button.registerKeyboardAction() 来为该按钮注册一个事件监听;查询JDK,该方法属于JButton的父类 JComponent 的一个方法:
public void registerKeyboardAction(ActionListener anAction, String aCommand, KeyStroke aKeyStroke, int aCondition)

public void registerKeyboardAction(ActionListener anAction, KeyStroke aKeyStroke, int aCondition)
参数:
anAction - 要注册的 Action
aCommand - 要在传递的事件中设置的命令
aKeyStroke - 与动作绑定的 KeyStroke
aCondition - 要符合的条件，见上文

例如jbtRemove.registerKeyboardAction(new BtnActionListener(),KeyStroke.getKeyStroke(KeyEvent.VK_D,0), JComponent.WHEN_IN_FOCUSED_WINDOW);

BtnActionListener为自己写的一个实现ActionListener 接口的类,处理按钮的单击事件.

例如：

<span style="font-size:14px;">private class BtnActionListener implements ActionListener{@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubObject[] values = jlist.getSelectedValues();for(int i=0;i<values.length ;i++)listModel.remove(jlist.getSelectedIndex());//listModel.remove(jlist.getSelectedIndex());}}</span>

也可以写作

<span style="font-size:14px;">jbtRemove.registerKeyboardAction(new ActionListener() {Object[] values = jlist.getSelectedValues();for(int i=0;i<values.length ;i++)listModel.remove(jlist.getSelectedIndex());//listModel.remove(jlist.getSelectedIndex());}},KeyStroke.getKeyStroke(KeyEvent.VK_D,0),JComponent.WHEN_IN_FOCUSED_WINDOW);</span>

3.使用监听器KeyAdapter。给控件添加键盘事件，也就是当键盘是的键按下时，会触发这个事件，然后调用keyPressed函数。无需alt
例如：

<span style="font-size:14px;">jlist.addKeyListener(new KeyListener() {@Overridepublic void keyTyped(KeyEvent e) {// TODO Auto-generated method stub}@Overridepublic void keyReleased(KeyEvent e) {// TODO Auto-generated method stub}@Overridepublic void keyPressed(KeyEvent e) {// TODO Auto-generated method stubint keyCode=e.getKeyCode();  //获取按的键盘上的健if(keyCode==KeyEvent.VK_D ){  //比较Object[] values = jlist.getSelectedValues();for(int i=0;i<values.length ;i++)listModel.remove(jlist.getSelectedIndex());}}});</span>

这是源代码：

<span style="font-size:14px;">import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.KeyEvent;import java.awt.event.KeyListener;import javax.swing.DefaultListModel;import javax.swing.JApplet;import javax.swing.JButton;import javax.swing.JComponent;import javax.swing.JList;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.KeyStroke;public class ListModelDemo extends JApplet {private DefaultListModel listModel = new DefaultListModel();private JList jlist = new JList(listModel);private JButton jbtAdd = new JButton("Add new item");private JButton jbtRemove = new JButton("Remove selected item");public ListModelDemo(){listModel.addElement("Iteml");listModel.addElement("Item2");listModel.addElement("Item3");listModel.addElement("Item4");listModel.addElement("Item5");listModel.addElement("Item6");//jbtRemove.registerKeyboardAction(new BtnActionListener(), KeyStroke.getKeyStroke(KeyEvent.VK_D,0), JComponent.WHEN_IN_FOCUSED_WINDOW);//jbtRemove.setMnemonic(KeyEvent.VK_D);JPanel panel = new JPanel();panel.add(jbtAdd);panel.add(jbtRemove);add(panel,BorderLayout.NORTH);add(new JScrollPane(jlist), BorderLayout.CENTER);jbtAdd.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubString newItem = JOptionPane.showInputDialog("Enter a new item");if(newItem!=null){if(jlist.getSelectedIndex()==-1)listModel.addElement(newItem);elselistModel.add(jlist.getSelectedIndex(), newItem);}}});jbtRemove.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubObject[] values = jlist.getSelectedValues();for(int i=0;i<values.length ;i++)listModel.remove(jlist.getSelectedIndex());//listModel.remove(jlist.getSelectedIndex());}});jlist.addKeyListener(new KeyListener() {@Overridepublic void keyTyped(KeyEvent e) {// TODO Auto-generated method stub}@Overridepublic void keyReleased(KeyEvent e) {// TODO Auto-generated method stub}@Overridepublic void keyPressed(KeyEvent e) {// TODO Auto-generated method stubint keyCode=e.getKeyCode();  //获取按的键盘上的健if(keyCode==KeyEvent.VK_D ){  //比较Object[] values = jlist.getSelectedValues();for(int i=0;i<values.length ;i++)listModel.remove(jlist.getSelectedIndex());}}});}private class BtnActionListener implements ActionListener{@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubObject[] values = jlist.getSelectedValues();for(int i=0;i<values.length ;i++)listModel.remove(jlist.getSelectedIndex());//listModel.remove(jlist.getSelectedIndex());}}}</span>