GUI编程

GUI编程

1、简介

GUI的核心技术：Swing AWT

1. 界面不美观
2. 需要JRE环境

为什么要学习？

1. 可以写出自己心中想要的小工具
2. 工作时，可能要维护Swing界面
3. 了解MVC架构，了解监听

2、AWT

2.1、AWT介绍

1. 包含了很多的类和接口

GUI：图形用户界面编程

2. 元素：窗口，按钮，文本框
3. java.awt

2.2、组件和容器

1、Frame

public static void main(String[] args) {
    Frame frame = new Frame("我的第一个java图形界面窗口");
    //设置可见性
    frame.setVisible(true);
    frame.setSize(400, 400);
    frame.setBackground(new Color(123, 45, 243));
    frame.setLocation(200, 200);
    frame.setResizable(false);
}

问题：窗口关闭不掉

2、Panel

public static void main(String[] args) {
    Frame frame = new Frame();
    Panel panel = new Panel();
    frame.setLayout(null);
    frame.setBounds(300,300,500,500);
    frame.setBackground(new Color(40,161,35));
    panel.setBounds(50,50,400,400);
    panel.setBackground(new Color(193,15,60));
    frame.add(panel);
    frame.setVisible(true);
    frame.addWindowListener(new WindowAdapter() {
        @Override
        public void windowClosing(WindowEvent e) {
            System.exit(0);
        }
    });
}

解决了窗口关闭问题

3、布局管理器

• 流式布局

public static void main(String[] args) {
    Frame frame = new Frame();
    Button button1 = new Button("button1");
    Button button2 = new Button("button2");
    Button button3 = new Button("button3");
    frame.setLayout(new FlowLayout(FlowLayout.LEFT));
    frame.setSize(200,200);
    frame.add(button1);
    frame.add(button2);
    frame.add(button3);
    frame.setVisible(true);
}

• 东西南北中

public static void main(String[] args) {
    Frame testBorderLayout = new Frame("TestBorderLayout");
    Button east = new Button("East");
    Button west = new Button("West");
    Button center = new Button("Center");
    Button north = new Button("North");
    Button south = new Button("South");
    testBorderLayout.add(east,BorderLayout.EAST);
    testBorderLayout.add(west,BorderLayout.WEST);
    testBorderLayout.add(north,BorderLayout.NORTH);
    testBorderLayout.add(south,BorderLayout.SOUTH);
    testBorderLayout.add(center,BorderLayout.CENTER);
    testBorderLayout.setSize(500,500);
    testBorderLayout.setVisible(true);
}

• 表格布局

public static void main(String[] args) {
    Frame frame = new Frame("TestGridLayout");
    Button b1 = new Button("b1");
    Button b2 = new Button("b2");
    Button b3 = new Button("b3");
    Button b4 = new Button("b4");
    Button b5 = new Button("b5");
    Button b6 = new Button("b6");
    frame.setLayout(new GridLayout(3,2));
    frame.add(b1);
    frame.add(b2);
    frame.add(b3);
    frame.add(b4);
    frame.add(b5);
    frame.add(b6);
    frame.pack();
    frame.setVisible(true);
}

4、事件监听

当某个事情发生的时候，该干什么

package com.dogegg.lesson2;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestActionEvent {
    public static void main(String[] args) {
        //按下按钮，触发事件
        Frame frame = new Frame();
        Button button = new Button();

        MyActionListener myActionListener = new MyActionListener();
        button.addActionListener(myActionListener);

        frame.add(button,BorderLayout.CENTER);
        frame.pack();
        windowCLose(frame);
        frame.setVisible(true);

    }

    //关闭
    private static void windowCLose(Frame frame) {
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

class MyActionListener implements ActionListener {

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("aa");
    }
}

5、输入框TextField监听

6、画笔

7、鼠标监听

8、窗口监听 WindowListener

9、键盘监听

3、Swing

1、窗口

2、弹窗

3、标签

label

4、面板

JPanel

JScrollPanel

5、按钮

• 单选按钮
• 复选按钮

6、列表

7、文本框

• 文本框
• 密码框
• 文本域