Java_基础—GUI(窗体/鼠标/键盘/动作监听和键盘事件)

我会带着你远行 2022-06-09 10:23 236阅读 0赞

**一、窗体监听**

Frame f = new Frame(“我的窗体”);  
//事件源是窗体,把监听器注册到事件源上  
//事件对象传递给监听器

package com.soar.gui;
    
    import java.awt.Button;
    import java.awt.FlowLayout;
    import java.awt.Frame;
    import java.awt.Toolkit;
    import java.awt.event.WindowAdapter;
    import java.awt.event.WindowEvent;
    import java.awt.event.WindowListener;
    
    public class Demo1_Frame {
        
    
         public static void main(String[] args) {
            Frame f = new Frame("MyQQ");
            f.setSize(400,600);             //设置窗体的长和宽
            f.setLocation(300,50);          //设置窗体的位置   
            f.setIconImage(Toolkit.getDefaultToolkit().createImage("qq.png"));  //为该窗体设置一个Logo
    
            Button b1 = new Button("按钮一");
            f.add(b1);
            f.setLayout(new FlowLayout());  //设置布局管理器
            //f.addWindowListener(new MyWindowsAdapter());
            f.addWindowListener(new WindowAdapter() {
                @Override
                public void windowClosing(WindowEvent e) {
                    System.exit(0);
                }
            });
    
            f.setVisible(true);             //设置窗体可见
        }
    }

![这里写图片描述][SouthEast]

**二、鼠标监听**

Button b1 = new Button("按钮一");
    f.add(b1);
            b1.addMouseListener(new MouseAdapter() {
                /*@Override
                 * 单击
                public void mouseClicked(MouseEvent e) {
                    System.exit(0);
                }*/
                @Override
                //释放
                public void mouseReleased(MouseEvent e) {
                    System.exit(0);
                }
            });

![这里写图片描述][SouthEast 1]

**三、键盘监听和键盘事件**

Button b1 = new Button("键盘敲击空格键关闭窗口");
            f.add(b1);
            b1.addKeyListener(new KeyAdapter() {
                @Override
                public void keyReleased(KeyEvent e) {
                    //System.out.println(e.getKeyCode());
                    //System.exit(0);
                    //if(e.getKeyCode() == 32){
        
                    if(e.getKeyCode() == KeyEvent.VK_SPACE){
                        System.exit(0);
                    }
                }
            });

![这里写图片描述][SouthEast 2]

**四、动作监听**

默认是单机鼠标左键和敲空格触发该事件

Button b2 = new Button("按空格和单击鼠标关闭窗口");
            f.add(b2);
            //添加动作监听，应用场景就是暂停视频和播放视频
            b2.addActionListener(new ActionListener() {     
                @Override
                public void actionPerformed(ActionEvent e) {
                    System.exit(0);
                }
            });

![这里写图片描述][SouthEast 3]

[SouthEast]: /images/20220609/dfb2479306a042b4b44e826a5fafe6e6.png
[SouthEast 1]: /images/20220609/01577396f8f44ff0ade2585c4550baf6.png
[SouthEast 2]: /images/20220609/3a73185ee45d4b21b43efad83ff05a9a.png
[SouthEast 3]: /images/20220609/ee8f2a4689824ef2b91dd2b7f3ffd7f6.png