AWT的事件处理

浅浅的花香味﹌ 2021-09-30 01:54 306阅读 0赞

**一 键盘事件**

1 代码

import java.awt.*;
    import java.awt.event.*;
    
    public class TestKeyEvent {
        public static void main( String[] args ) {
            Frame frame = new Frame("TestKeyEvent");
            Label message = new Label("请按任意键", Label.CENTER);
            Label keyChar = new Label("", Label.CENTER);
            frame.setSize(300, 200);
            frame.requestFocus();
            frame.add(message, BorderLayout.NORTH);
            frame.add(keyChar, BorderLayout.CENTER);
            frame.addKeyListener(new KeyAdapter() {
                public void keyPressed( KeyEvent e ) {
                    keyChar.setText(KeyEvent.getKeyText(e.getKeyCode()) + "  键被按下");
                }
            });
            frame.addWindowListener(new WindowAdapter() {
                public void windowClosing( WindowEvent e ) {
                    System.exit(0);
                }
            });
            frame.setVisible(true);
        }
    }

2 运行

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

**二 鼠标事件**

1 代码

import java.awt.*;
    import java.awt.event.*;
    
    public class TestMouseEvent {
        private int x, y;
    
        public static void main( String[] args ) {
            new TestMouseEvent();
        }
    
        public TestMouseEvent() {
            Frame frame = new Frame("鼠标事件演示");
            Label actionLabel = new Label("当前鼠标操作:");
            Label location = new Label("当前鼠标位置:");
            actionLabel.setBackground(Color.PINK);
            frame.setSize(300, 200);
            frame.add(actionLabel, BorderLayout.CENTER);
            frame.add(location, BorderLayout.NORTH);
            frame.setVisible(true);
            frame.addWindowListener(new WindowAdapter() {
                public void windowClosing( WindowEvent e ) {
                    System.exit(0);
                }
            });
            actionLabel.requestFocus();
            actionLabel.addMouseListener(new MouseAdapter() {
                public void mouseEntered( MouseEvent e ) {
                    actionLabel.setText("当前鼠标操作:进入标签");
                }
    
                public void mousePressed( MouseEvent e ) {
                    actionLabel.setText("当前鼠标操作:按下按键");
                }
    
                public void mouseReleased( MouseEvent e ) {
                    actionLabel.setText("当前鼠标操作:按键释放");
                }
    
                public void mouseClicked( MouseEvent e ) {
                    actionLabel.setText("当前鼠标操作:单击按键");
                }
    
                public void mouseExited( MouseEvent e ) {
                    actionLabel.setText("当前鼠标操作:移出标签");
                }
            });
            actionLabel.addMouseMotionListener(new MouseMotionAdapter() {
                public void mouseMoved( MouseEvent event ) {
                    x = event.getX();
                    y = event.getY();
                    location.setText("当前鼠标位置:     X坐标：" + x + " Y坐标： " + y);
                }
            });
        }
    }

2 运行

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1][]

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