如题 最好能举例说明 可用如下例子 当SPACE 按下的时候输出一个值 放开的时候输出另一个值
import java.awt.*;
import java.awt.event.*;
public class Test extends Frame {
public void lauchFrame() {
this.setLocation(400, 300);
this.setSize(800, 600);
setVisible(true);
this.addKeyListener(new KeyMonitor()); // 添加键盘响应
} public static void main(String[] args) {
Test tc = new Test();
tc.lauchFrame();
}
private class KeyMonitor extends KeyAdapter{
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
switch(key){
case KeyEvent.VK_SPACE:
System.out.println("asd");
break;
case KeyEvent.VK_DOWN:
System.out.println("jack");
break;
}
}
}}
import java.awt.*;
import java.awt.event.*;
public class Test extends Frame {
public void lauchFrame() {
this.setLocation(400, 300);
this.setSize(800, 600);
setVisible(true);
this.addKeyListener(new KeyMonitor()); // 添加键盘响应
} public static void main(String[] args) {
Test tc = new Test();
tc.lauchFrame();
}
private class KeyMonitor extends KeyAdapter{
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
switch(key){
case KeyEvent.VK_SPACE:
System.out.println("asd");
break;
case KeyEvent.VK_DOWN:
System.out.println("jack");
break;
}
}
}}
import java.awt.event.*;import javax.swing.JButton;
import javax.swing.JFrame;public class Test1 extends JFrame { /**
*
*/
private static final long serialVersionUID = 1L;
JButton press = null; public Test1() {
Container c = this.getContentPane();
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setLayout(new FlowLayout());
this.setLocation(400, 300);
this.setSize(800, 600); press = new JButton("按下");
c.add(press);
press.addKeyListener(new KeyMonitor()); // 添加键盘响应
setVisible(true);
} private class KeyMonitor extends KeyAdapter {
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
switch (key) {
case KeyEvent.VK_W:
press.setText(String.valueOf(e.getKeyChar()));
break;
case KeyEvent.VK_S:
press.setText(String.valueOf(e.getKeyChar()));
break;
}
} @Override
public void keyReleased(KeyEvent e) {
press.setText(String.valueOf("按下"));
} } public static void main(String[] args) {
Test1 tc = new Test1();
}}