Java.Swing.button繫結快捷鍵的3種辦法
阿新 • • 發佈：2018-12-26
1.使用button.setMnemonic方法，例如：jbtRemove.setMnemonic(java.awt.event.KeyEvent.VK_D);
public void registerKeyboardAction(ActionListener anAction, String aCommand, KeyStroke aKeyStroke, int aCondition)
public void registerKeyboardAction(ActionListener anAction, KeyStroke aKeyStroke, int aCondition)
引數:
anAction - 要註冊的 Action
aCommand - 要在傳遞的事件中設定的命令
aKeyStroke - 與動作繫結的 KeyStroke
aCondition - 要符合的條件，見上文
也可以寫作
3.使用監聽器KeyAdapter。給控制元件新增鍵盤事件，也就是當鍵盤是的鍵按下時，會觸發這個事件，然後呼叫keyPressed函式。無需alt
例如：
注意使用這個方法只能用alt+d才可以使用快捷鍵，可以看作是綁定了熱鍵。
2.使用button.registerKeyboardAction()方法，這裡可以用button.registerKeyboardAction() 來為該按鈕註冊一個事件監聽;查詢JDK,該方法屬於JButton的父類 JComponent 的一個方法:public void registerKeyboardAction(ActionListener anAction, String aCommand, KeyStroke aKeyStroke, int aCondition)
public void registerKeyboardAction(ActionListener anAction, KeyStroke aKeyStroke, int aCondition)
引數:
anAction - 要註冊的 Action
aCommand - 要在傳遞的事件中設定的命令
aKeyStroke - 與動作繫結的 KeyStroke
aCondition - 要符合的條件，見上文
例如jbtRemove.registerKeyboardAction(new BtnActionListener(),KeyStroke.getKeyStroke(KeyEvent.VK_D,0), JComponent.WHEN_IN_FOCUSED_WINDOW);
BtnActionListener為自己寫的一個實現ActionListener 介面的類,處理按鈕的單擊事件.
例如：<span style="font-size:14px;">private class BtnActionListener implements ActionListener{ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub Object[] values = jlist.getSelectedValues(); for(int i=0;i<values.length ;i++) listModel.remove(jlist.getSelectedIndex()); // listModel.remove(jlist.getSelectedIndex()); } }</span>
也可以寫作
<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.使用監聽器KeyAdapter。給控制元件新增鍵盤事件，也就是當鍵盤是的鍵按下時，會觸發這個事件，然後呼叫keyPressed函式。無需alt
例如：
<span style="font-size:14px;">jlist.addKeyListener(new KeyListener() {
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyPressed(KeyEvent e) {
// TODO Auto-generated method stub
int keyCode=e.getKeyCode(); //獲取按的鍵盤上的健
if(keyCode==KeyEvent.VK_D ){ //比較
Object[] values = jlist.getSelectedValues();
for(int i=0;i<values.length ;i++)
listModel.remove(jlist.getSelectedIndex());
}
}
});</span>這是原始碼：
<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() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String newItem = JOptionPane.showInputDialog("Enter a new item");
if(newItem!=null){
if(jlist.getSelectedIndex()==-1)
listModel.addElement(newItem);
else
listModel.add(jlist.getSelectedIndex(), newItem);
}
}
});
jbtRemove.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
Object[] values = jlist.getSelectedValues();
for(int i=0;i<values.length ;i++)
listModel.remove(jlist.getSelectedIndex());
// listModel.remove(jlist.getSelectedIndex());
}
});
jlist.addKeyListener(new KeyListener() {
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyPressed(KeyEvent e) {
// TODO Auto-generated method stub
int keyCode=e.getKeyCode(); //獲取按的鍵盤上的健
if(keyCode==KeyEvent.VK_D ){ //比較
Object[] values = jlist.getSelectedValues();
for(int i=0;i<values.length ;i++)
listModel.remove(jlist.getSelectedIndex());
}
}
});
}
private class BtnActionListener implements ActionListener{
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
Object[] values = jlist.getSelectedValues();
for(int i=0;i<values.length ;i++)
listModel.remove(jlist.getSelectedIndex());
// listModel.remove(jlist.getSelectedIndex());
}
}
}
</span>