怎么用Java监听键盘实现Ctrl+字母的快捷键

[a272503680]

各位高手，请教一下，怎么用Java监听键盘实现Ctrl+字母的快捷键，好像JDK只提供了Alt+数字键的快捷键，谢谢！

[wanchangjiu123]

我给你举个例子:
MenuBar menubar = new MenuBar();
Menu menu = new Menu("游戏");
MenuShortcut paMsc = new MenuShortcut(KeyEvent.VK_P, false);
MenuShortcut stMsc = new MenuShortcut(KeyEvent.VK_S, false);//实现Ctrl+S 的快捷键 你去看文档
MenuItem pa = new MenuItem("暂停", paMsc);
MenuItem st = new MenuItem("继续", stMsc);

在Frame窗口中:
menubar.add(menu);
menu.add(pa);
menu.add(st);
pa.addActionListener(new MenuListener);
st.addActionListener(new MenuListener);
this.setMenuBar(menubar);

//监听器类
private class MenuListener implements ActionListener {

public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equals("暂停")) {
System.out.println("你按下了暂停菜单");
} else if (e.getActionCommand().equals("继续")) {
System.out.println("你按下了继续菜单");
}
}

}


这样你按 Ctrl + p System.out.println("你按下了暂停菜单");
按 Ctrl +s System.out.println("你按下了继续菜单");

[铁匠梁老师]

你先看看你的组合键打印出来的是什么字符。最后通过事件的标示符来判断是不是你想要的组合键。
比如我实现的Ctrl+X关闭一个面板。代码如下：

import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;

public class MainFace extends JFrame {

	public MainFace() {

		super("Ideal GUI");
		//添加默认的点击关闭按钮的动作实现
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				dispose();
				System.exit(0);
			}
		});
		
		//下面的代码是为主面板添加键盘事件监听
		addKeyListener(new KeyListener() {

			@Override
			public void keyPressed(KeyEvent e) {
				//按下某个键时调用此方法

			}

			@Override
			public void keyReleased(KeyEvent e) {
				//释放某个键时调用此方法
			}

			@Override
			public void keyTyped(KeyEvent e) {
				//键入某个键时调用此方法
				KeyStroke.getKeyStroke(KeyEvent.VK_Q, InputEvent.CTRL_MASK);
				System.out.println(" code = " + e.getKeyCode());
				if (e.getKeyChar() == '') {
					System.exit(1);
				}
			}

		});
	}
	
	public static void main(String args[]) {
		MainFace mGUI = new MainFace();
		mGUI.requestFocus();
	}
}

[铁匠梁老师]

代码有点小错误，看不到效果，已经修正

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;

public class MainFace extends JFrame {

	public MainFace() {

		super("Ideal GUI");
		//添加默认的点击关闭按钮的动作实现
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				dispose();
				System.exit(0);
			}
		});
		
		//下面的代码是为主面板添加键盘事件监听
		addKeyListener(new KeyListener() {

			@Override
			public void keyPressed(KeyEvent e) {
				//按下某个键时调用此方法

			}

			@Override
			public void keyReleased(KeyEvent e) {
				//释放某个键时调用此方法
			}

			@Override
			public void keyTyped(KeyEvent e) {
				//键入某个键时调用此方法
				if (e.getKeyChar() == '') {
					System.exit(1);
				}
			}

		});
	}
	
	public static void main(String args[]) {
		MainFace mGUI = new MainFace();
		mGUI.setSize(400, 300);
		mGUI.setVisible(true);
		mGUI.requestFocus();
	}
}

[a272503680]

谢谢各位高手

[john1225_xie]

public class TestEvent {
public static void main(String[] args) {

JFrame frame = new JFrame(" TestKeyPressed ");
frame.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if ((e.isControlDown() == true)
&& (e.getKeyCode() == KeyEvent.VK_UP)) {
System.out.println("ctrl + UP has pressed");
} else {
System.out.println("other key pressed");
}
}
});
frame.setSize(500, 500);
frame.setVisible(true);
}
}

[qq386462123]

谢谢，对我帮助很大，