GUI编程

程序员文章站 2022-03-08 10:30:03

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GUI编程

告诉大家该怎么学？

这是什么？
它怎么玩？
该如何在我们平时运用？
反编译：class–>可阅读文件

组件

窗口
弹窗
面板
文本框
列表框
按钮
图片
监听事件
鼠标
键盘事件
外挂：Java
**工具：Java

1.简介

GUI的核心技术：Swing、AWT

淘汰原因：

界面不美观
需要jre环境

为什么我们要学习？

可以写出自己心中想要的一些小工具
工作的时候，也可能现需要维护到Swing界面，概率极小！
了解MVC架构，了解监听！

2.AWT底层实现

2.1Awt介绍

Eclipse：Java

1.包含了很多类和接口！GUI：图形用户编程！

2.元素：窗口，按钮，文本框

3.Java.awt

组件：

	button、TextArea、Label、...（存在容器中add）

	容器Container

		面板Panel：

			Applet

		Window：

			Frame

			Dialog

2.2组件和容器

窗口Frame

package com.sjy.lesson01;

import java.awt.*;

//GUI的第一个界面
public class TestFrame {
    public static void main(String[] args) {

        //Frame,JDK,看源码！
        Frame frame = new Frame("我的第一个Java图像界面窗口");

        //需要设置可见性 w h
        frame.setVisible(true);

        //设置窗口大小
        frame.setSize(400,400);

        //设置背景颜色 Color
        //frame.setBackground(Color.black);
        frame.setBackground(new Color(85,150,68));

        //弹出的初始位置
        frame.setLocation(200,200);

        //设置大小固定
        frame.setResizable(false);
    }
}

问题：发现窗口关闭不掉，停止Java程序！

2.2.1Frame封装：

package com.sjy.lesson01;

import java.awt.*;

public class TestFrame2 {
    public static void main(String[] args) {
        //展示多个窗口 new
        MyFrame myFrame1 = new MyFrame(100, 100, 200, 200, Color.blue);
        MyFrame myFrame2 = new MyFrame(300, 100, 200, 200, Color.yellow);
        MyFrame myFrame3 = new MyFrame(100, 300, 200, 200, Color.red);
        MyFrame myFrame4 = new MyFrame(300, 300, 200, 200, Color.magenta);
    }
}

class MyFrame extends Frame {
    static int id = 0;//可能存在多个窗口，我们需要一个计数器

    //x、y:初始化位置 w h:宽高
    public MyFrame(int x,int y,int w,int h,Color color) throws HeadlessException {
        super("MyFrame"+(++id));
        setBounds(x,y,w,h);
        setBackground(color);
        setVisible(true);
    }

面板Panel

解决了关闭事件！

package com.sjy.lesson01;

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

//Panel 面板 可以看成是一个空间，但是不能单独存在
public class TestPanel {
    public static void main(String[] args) {
        Frame frame = new Frame();
        //布局的概念
        Panel panel = new Panel();

        //设置布局
        frame.setLayout(null);

        //坐标 大小 颜色
        frame.setBounds(300,300,500,500);
        frame.setBackground(new Color(40,161,35));

        //panel设置坐标，相对于frame
        panel.setBounds(50,50,400,400);
        //panel设置颜色
        panel.setBackground(new Color(193,15,60));

        //frame.add(panel)
        frame.add(panel);

        frame.setVisible(true);

        //监听事件，监听窗口关闭事件 System.exit(0)
        //适配器模式
        frame.addWindowListener(new WindowAdapter() {
            //窗口点击关闭的时候需要做的事情
            @Override
            public void windowClosing(WindowEvent e) {
                super.windowClosing(e);
                //结束程序
                System.exit(0);
            }
        });
    }
}

2.3布局管理器

流式布局（默认）Flow

package com.sjy.lesson01;

import java.awt.*;

public class TestFlowLayout {
    public static void main(String[] args) {
        Frame frame = new Frame();

        //组件：按钮
        Button button1 = new Button("Button1");
        Button button2 = new Button("Button2");
        Button button3 = new Button("Button3");

        //设置流式布局
        //frame.setLayout(new FlowLayout());//居中
        //frame.setLayout(new FlowLayout(FlowLayout.LEFT));//左
        frame.setLayout(new FlowLayout(FlowLayout.RIGHT));//右

        frame.setSize(200,200);

        //把按妞添加上去
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);

        frame.setVisible(true);
    }
}

东西南北中Border

package com.sjy.lesson01;

import java.awt.*;

public class TsetBorderLayout {
    public static void main(String[] args) {
        Frame frame = new Frame("TestBorderLayout");

        Button east = new Button("East");
        Button west = new Button("West");
        Button south = new Button("South");
        Button north = new Button("North");
        Button center = new Button("Center");

        frame.add(east,BorderLayout.EAST);
        frame.add(west,BorderLayout.WEST);
        frame.add(south,BorderLayout.SOUTH);
        frame.add(north,BorderLayout.NORTH);
        frame.add(center,BorderLayout.CENTER);

        frame.setSize(200,200);
        frame.setVisible(true);
    }
}

表格布局Grid

package com.sjy.lesson01;

import java.awt.*;

public class TestGridLayout {
    public static void main(String[] args) {
        Frame frame = new Frame("TestGridLayout");

        Button btn1 = new Button("btn1");
        Button btn2 = new Button("btn2");
        Button btn3 = new Button("btn3");
        Button btn4 = new Button("btn4");
        Button btn5 = new Button("btn5");
        Button btn6 = new Button("btn6");

        frame.setLayout(new GridLayout(3,2));

        frame.add(btn1);
        frame.add(btn2);
        frame.add(btn3);
        frame.add(btn4);
        frame.add(btn5);
        frame.add(btn6);

        frame.pack();//Java函数！自动的选择最优秀的布局来确定
        frame.setVisible(true);
    }
}

练习：

package com.sjy.lesson01;

import java.awt.*;

//练习的demo
public class ExerciseDemo {
    public static void main(String[] args) {
        //总 Frame
        Frame frame = new Frame();
        frame.setLayout(new GridLayout(2,1));

        frame.setSize(400,300);
        frame.setLocation(300,400);
        frame.setBackground(Color.BLACK);
        frame.setVisible(true);

        //四个面板
        Panel panel1 = new Panel(new BorderLayout());
        Panel panel2 = new Panel(new GridLayout(2,1));
        Panel panel3 = new Panel(new BorderLayout());
        Panel panel4 = new Panel(new GridLayout(2,2));

        //上面
        panel1.add(new Button("East-1"),BorderLayout.EAST);
        panel1.add(new Button("West-1"),BorderLayout.WEST);
        panel2.add(new Button("p2-btn-1"));
        panel2.add(new Button("p2-btn-2"));
        panel1.add(panel2,BorderLayout.CENTER);

        //下面
        panel3.add(new Button("East-2"),BorderLayout.EAST);
        panel3.add(new Button("West-2"),BorderLayout.WEST);
        panel4.add(new Button("p2-btn-3"));
        panel4.add(new Button("p2-btn-4"));
        panel4.add(new Button("p2-btn-5"));
        panel4.add(new Button("p2-btn-6"));
        panel3.add(panel4,BorderLayout.CENTER);

        frame.add(panel1);
        frame.add(panel3);
    }
    
            frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                super.windowClosing(e);
                System.exit(0);
            }
        });
}

总结：

Frame是一个*窗口
Panel无法单独显示，必须添加到某个容器中
布局管理器
1. 流式
2. 东西南北中
3. 表格
大小，定位，背景颜色，可见性，监听！

2.4事件监听

事件监听：当某个事情发送的时候，干什么？

package com.sjy.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，触发一些事件
        Frame frame = new Frame();
        Button button = new Button();

        //因为addActionListener需要一个ActionListener，所以我们需要构造一个ActionListener
        MyActionListener myActionListener = new MyActionListener();
        button.addActionListener(myActionListener);

        frame.add(button,BorderLayout.CENTER);
        frame.pack();

        windowClose(frame);//关闭窗口
        frame.setVisible(true);


    }
    //关闭窗体的事件
    private static void windowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                super.windowClosing(e);
                System.exit(0);
            }
        });
    }
}

class MyActionListener implements ActionListener{

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

多个按钮，共享一个事件：

package com.sjy.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 TestActionEvent2 {
    public static void main(String[] args) {
        //两个按钮，实现同一个监听
        //开始 停止
        Frame frame = new Frame("开始-停止");
        Button button1 = new Button("start");
        Button button2 = new Button("stop");

        //可以显示的定义会触发返回的命令
        //可以多个按钮致谢一个监听类
        button1.setActionCommand("button1-start");
        button2.setActionCommand("button2-stop");

        MyMonitor myMonitor = new MyMonitor();
        button1.addActionListener(myMonitor);
        button2.addActionListener(myMonitor);

        frame.add(button1,BorderLayout.NORTH);
        frame.add(button2,BorderLayout.SOUTH);
        frame.pack();
        frame.setVisible(true);
        windowClose(frame);
    }
    //关闭窗体的事件
    private static void windowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                super.windowClosing(e);
                System.exit(0);
            }
        });
    }
}

class MyMonitor implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("按钮被点击了：msg" + e.getActionCommand());
    }
}

2.5输入框TextField监听

package com.sjy.lesson2;

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

public class TestText1 {
    public static void main(String[] args) {
        //启动！
        new MyFrame();
    }
}

class MyFrame extends Frame{
    public MyFrame(){
        TextField textField = new TextField();
        add(textField);

        //监听这个文本框输入的文字
        MyActionListener2 myActionListener2 = new MyActionListener2();
        //按下enter 就会触发这个输入框的事件
        textField.addActionListener(myActionListener2);

        //设置替换编码
        textField.setEchoChar('*');
        setVisible(true);
        pack();
    }
}

class MyActionListener2 implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        TextField field = (TextField) e.getSource();//获得一些资源,返回的一个对象
        System.out.println(field.getText());//获得输入框中的文本
        field.setText(""); //null是字符串 ""是空
    }
}

2.6简易计算器，组合+内部类回顾复习！

oop原则：组合，大于继承！

class A extends B{

}

class A{
 public B b; 
}

简易计算器：

package com.sjy.lesson2;

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

//简易计算器
public class TsetCaculate {
    public static void main(String[] args) {
        new Calculator();
    }
}

//计算器类
class Calculator extends Frame {
    public Calculator() {
        //3个文本框
        TextField num1 = new TextField(10);//字符数
        TextField num2 = new TextField(10);//字符数
        TextField num3 = new TextField(20);//字符数
        //1个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculateListener(num1,num2,num3));
        //1个标签
        Label label = new Label("+");

        //布局
        setLayout(new FlowLayout());
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setVisible(true);
    }
}
//监听器类
class MyCalculateListener implements ActionListener{

    //获取三个变量
    private TextField num1,num2,num3;

    public MyCalculateListener(TextField num1,TextField num2,TextField num3){
        this.num1 = num1;
        this.num2 = num2;
        this.num3 = num3;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        //1.获得加数和被加数
        int i1 = Integer.parseInt(num1.getText());
        int i2 = Integer.parseInt(num2.getText());
        //2.将这个值+预算后，放到第三个框
        num3.setText(""+(i1+i2));
        //3.清除前两个框
        num1.setText("");
        num2.setText("");
    }
}

完全改造为面向对象写法：

package com.sjy.lesson2;

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

//简易计算器
public class TsetCaculate {
    public static void main(String[] args) {
        new Calculator().loadFrame();
    }
}

//计算器类
class Calculator extends Frame {

    //属性
    TextField num1,num2,num3;
    //方法
    public void loadFrame(){
        //3个文本框
        num1 = new TextField(10);//字符数
        num2 = new TextField(10);//字符数
        num3 = new TextField(20);//字符数
        //1个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculateListener(this));
        //1个标签
        Label label = new Label("+");

        //布局
        setLayout(new FlowLayout());
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setVisible(true);
    }

}
//监听器类
class MyCalculateListener implements ActionListener{

    //获取计算器这个对象,在一个类中组合另外一个类
    private Calculator calculator = null;

    public MyCalculateListener(Calculator calculator){
        this.calculator = calculator;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        //1.获得加数和被加数
        int i1 = Integer.parseInt(calculator.num1.getText());
        int i2 = Integer.parseInt(calculator.num2.getText());
        //2.将这个值+预算后，放到第三个框
        calculator.num3.setText(""+(i1+i2));
        //3.清除前两个框
        calculator.num1.setText("");
        calculator.num2.setText("");
    }
}

内部类：

更好的包装
最大的好处，就是可以畅通无阻的访问外部的属性和方法！

package com.sjy.lesson2;

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

//简易计算器
public class TsetCaculate {
    public static void main(String[] args) {
        new Calculator().loadFrame();
    }
}

//计算器类
class Calculator extends Frame {
    //属性
    TextField num1,num2,num3;
    //方法
    public void loadFrame(){
        //3个文本框
        num1 = new TextField(10);//字符数
        num2 = new TextField(10);//字符数
        num3 = new TextField(20);//字符数
        //1个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculateListener());
        //1个标签
        Label label = new Label("+");
        //布局
        setLayout(new FlowLayout());
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setVisible(true);
    }

    //监听器类
    private class MyCalculateListener implements ActionListener{
        @Override
        public void actionPerformed(ActionEvent e) {
            //1.获得加数和被加数
            int i1 = Integer.parseInt(num1.getText());
            int i2 = Integer.parseInt(num2.getText());
            //2.将这个值+预算后，放到第三个框
            num3.setText(""+(i1+i2));
            //3.清除前两个框
            num1.setText("");
            num2.setText("");
        }
    }
}

2.7画笔paint

package com.sjy.lesson3;

import java.awt.*;

public class TestPaint {
    public static void main(String[] args) {
        new MyPaint().loadFrame();
    }
}

class MyPaint extends Frame{

    public void loadFrame(){
        setBounds(200,200,600,500);
        setVisible(true);
    }

    //画笔
    @Override
    public void paint(Graphics g) {
        super.paint(g);
        //画笔，需要有颜色，画笔可以画画
        g.setColor(Color.red);
        //g.drawOval(100,100,100,100);//空心的圆
        g.fillOval(100,100,100,100);//实心的圆

        g.setColor(Color.green);
        g.fillRect(200,200,200,200);//矩形

        //养成习惯，画笔用完，将他还原到最初的颜色
    }
}

2.8鼠标监听

目的：想要实现鼠标画画！

package com.sjy.lesson3;

import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.Iterator;

//鼠标监听事件
public class TestMouseListener {
    public static void main(String[] args) {
        new MyFrame("画图");
    }
}

//自己的类
class MyFrame extends Frame{
    //画画需要画笔，需要监听鼠标当前的位置，需要集合来存储这个点

    ArrayList points;

    public MyFrame(String title){
        super(title);
        setBounds(200,200,400,300);
        //存鼠标点击的点
        points = new ArrayList<>();
        //鼠标监听器，针对这个窗口的
        this.addMouseListener(new MyMouseListener());

        setVisible(true);
    }

    @Override
    public void paint(Graphics g) {
        super.paint(g);
        //画画，监听鼠标的事件
        Iterator iterator = points.iterator();
        while (iterator.hasNext()){
            Point point = (Point) iterator.next();
            g.setColor(Color.blue);
            g.fillOval(point.x,point.y,10,10);
        }
    }

    //添加一个点到界面上
    public void addPaint(Point point){
        points.add(point);
    }

    private class MyMouseListener extends MouseAdapter{
        //鼠标：按下、弹起、按住不放
        @Override
        public void mousePressed(MouseEvent e) {
            super.mousePressed(e);
            MyFrame myFrame = (MyFrame) e.getSource();
            //这个我们点击的时候，就会在界面上产生一个点！画
            //这个点就是鼠标的点
            myFrame.addPaint(new Point(e.getX(),e.getY()));

            //每次点击鼠标都需要重新画一遍
            myFrame.repaint();//刷新
        }
    }
}

2.9窗口监听

package com.sjy.lesson3;

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

public class TestWindow {
    public static void main(String[] args) {
        new WindowFrame();
    }
}
class WindowFrame extends Frame{
    public WindowFrame(){
        setBackground(Color.blue);
        setBounds(100,100,200,200);
        setVisible(true);
        addWindowListener(new MyWindowListener());
    }
    class MyWindowListener extends WindowAdapter{
        @Override
        public void windowClosing(WindowEvent e) {
            super.windowClosing(e);
            setVisible(false);//通过按钮，隐藏窗口
            System.exit(0);//正常退出
        }
    }
}

2.10键盘监听

package com.sjy.lesson3;

import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

//键盘监听
public class TestKeyListener {
    public static void main(String[] args) {
        new KeyFrame();
    }
}

class KeyFrame extends Frame{
    public KeyFrame(){
        setBounds(100,200,300,400);
        setVisible(true);

        addKeyListener(new KeyAdapter() {
            //键盘按下
            @Override
            public void keyPressed(KeyEvent e) {
                super.keyPressed(e);
                //获取键盘按下的键盘死哪一个，当前的码
                int keyCode = e.getKeyCode();//不需要去记录这个数值，直接使用静态属性VK_XXX
                System.out.println(keyCode);
                if(keyCode == KeyEvent.VK_UP){
                    System.out.println("你按下了上键");
                }
                //根据按下不同操作，产生不同的结果
            }
        });
    }
}

3.Swing界面

3.1窗口、面板JFrame

package com.sjy.lesson4;

import javax.swing.*;
import java.awt.*;

public class JFrameDemo {

    //init();初始化
    public void init(){
        //*窗口
        JFrame jFrame = new JFrame("这是一个JFrame窗口");
        jFrame.setVisible(true);
        jFrame.setBounds(100,100,200,200);
        jFrame.setBackground(Color.cyan);
        //设置文字JLabel
        JLabel jLabel = new JLabel("欢迎来到GUI编程");
        jFrame.add(jLabel);

        //容器实例化
        Container contentPane = jFrame.getContentPane();
        contentPane.setBackground(Color.cyan);

        //让文本标签居中
        jLabel.setHorizontalAlignment(SwingConstants.CENTER);

        //关闭事件
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        //建立一个窗口
        new JFrameDemo().init();
    }
}

3.2弹窗JDialog

用来被弹出，默认就有关闭事件

package com.sjy.lesson4;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//主窗口
public class DialogDemo extends JFrame {

    public DialogDemo(){
        this.setVisible(true);
        this.setSize(700,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //JFrame 放东西，容器
        Container container = this.getContentPane();
        //绝对布局
        container.setLayout(null);

        //按钮
        JButton jButton = new JButton("点击弹出一个对话框");//创建
        jButton.setBounds(30,30,200,50);

        //点击这个按钮的时候，弹出一个弹窗
        jButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                //弹窗
                new MyDialogDemo();
            }
        });

        container.add(jButton);

    }

    public static void main(String[] args) {
        new DialogDemo();
    }
}

//弹窗的窗口
class MyDialogDemo extends JDialog{
    public MyDialogDemo(){
        this.setVisible(true);
        this.setBounds(100,100,500,500);
        //this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Container contentPane = this.getContentPane();
        contentPane.setLayout(null);
        
    }
}

3.3标签

label

new JLable("xxx");

图标ICON:

package com.sjy.lesson4;

import javax.swing.*;
import java.awt.*;

//图标，需要实现类，JFrame继承
public class IconDemo extends JFrame implements Icon {

    private int width;
    private int height;

    public IconDemo() throws HeadlessException {//无参构造
    }

    public IconDemo(int width, int height) throws HeadlessException {
        this.width = width;
        this.height = height;
    }

    public void init(){
        IconDemo iconDemo = new IconDemo(15, 15);
        //图标放在标签，也可以放在按钮上！
        JLabel jLabel = new JLabel("iconTest", iconDemo, SwingConstants.CENTER);

        Container contentPane = getContentPane();
        contentPane.add(jLabel);

        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new IconDemo().init();
    }

    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
        g.fillOval(x,y,width,height);
    }

    @Override
    public int getIconWidth() {
        return this.width;
    }

    @Override
    public int getIconHeight() {
        return this.height;
    }
}

图片ICON：

package com.sjy.lesson4;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class ImageIconDemo extends JFrame {

    public ImageIconDemo(){
        //获取图片的地址
        JLabel jLabel = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("1.bmp");

        ImageIcon imageIcon = new ImageIcon(url);//命名不要冲突
        jLabel.setIcon(imageIcon);
        jLabel.setHorizontalAlignment(SwingConstants.CENTER);

        Container contentPane = getContentPane();
        contentPane.add(jLabel);

        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setBounds(100,100,1000,1000);
    }
    public static void main(String[] args) {
        new ImageIconDemo();
    }
}

3.4面板

package com.sjy.lesson5;

import javax.swing.*;
import java.awt.*;

public class JPanelDemo extends JFrame {
    public JPanelDemo(){
        Container contentPane = this.getContentPane();
        contentPane.setLayout(new GridLayout(2,1,10,10));//后面的参数的意思是间距

        JPanel jPanel1 = new JPanel(new GridLayout(1,3));
        JPanel jPanel2 = new JPanel(new GridLayout(1,2));
        JPanel jPanel3 = new JPanel(new GridLayout(2,1));
        JPanel jPanel4 = new JPanel(new GridLayout(3,2));

        jPanel1.add(new JButton("1"));
        jPanel1.add(new JButton("1"));
        jPanel1.add(new JButton("1"));
        jPanel2.add(new JButton("2"));
        jPanel2.add(new JButton("2"));
        jPanel3.add(new JButton("3"));
        jPanel3.add(new JButton("3"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));

        contentPane.add(jPanel1);
        contentPane.add(jPanel2);
        contentPane.add(jPanel3);
        contentPane.add(jPanel4);

        this.setVisible(true);
        this.setSize(500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new JPanelDemo();
    }
}

JScrollPanel：

package com.sjy.lesson5;

import javax.swing.*;
import java.awt.*;

public class JScrollDemo extends JFrame {

    public JScrollDemo() throws HeadlessException {
        Container contentPane = this.getContentPane();

        //文本域
        JTextArea jTextArea = new JTextArea(20, 50);
        jTextArea.setText("欢迎来到GUI编程");

        //Scroll面板
        JScrollPane jScrollPane = new JScrollPane(jTextArea);
        contentPane.add(jScrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JScrollDemo();
    }
}

3.5按钮

图片按钮：

package com.sjy.lesson5;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo1 extends JFrame {

    public JButtonDemo1(){
        Container contentPane = this.getContentPane();
        //将一个图片变为图标
        URL resource = JButtonDemo1.class.getResource("1.bmp");
        Icon icon = new ImageIcon(resource);

        //把这个图标方法按钮上
        JButton jButton = new JButton();
        jButton.setIcon(icon);
        jButton.setToolTipText("图片按钮");

        //add
        contentPane.add(jButton);

        this.setVisible(true);
        this.setBounds(100,100,1000,1000);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo1();
    }
}

单选按钮：

package com.sjy.lesson5;

import javax.swing.*;
import java.awt.*;

public class JButtonDemo2 extends JFrame {

    public JButtonDemo2(){
        Container contentPane = this.getContentPane();

        //单选框
        JRadioButton jRadioButton1 = new JRadioButton("JRadioButton1");
        JRadioButton jRadioButton2 = new JRadioButton("JRadioButton2");
        JRadioButton jRadioButton3 = new JRadioButton("JRadioButton3");

        //由于单选框只能选择一个，分组,一个族中只能选择一个
        ButtonGroup buttonGroup = new ButtonGroup();
        buttonGroup.add(jRadioButton1);
        buttonGroup.add(jRadioButton2);
        buttonGroup.add(jRadioButton3);

        contentPane.add(jRadioButton1,BorderLayout.CENTER);
        contentPane.add(jRadioButton2,BorderLayout.NORTH);
        contentPane.add(jRadioButton3,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setBounds(100,100,1000,1000);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo2();
    }
}

复选按钮：

package com.sjy.lesson5;

import javax.swing.*;
import java.awt.*;

public class JButtonDemo3 extends JFrame {

    public JButtonDemo3(){
        Container contentPane = this.getContentPane();

        //多选框
        JCheckBox checkBox1 = new JCheckBox("checkBox1");
        JCheckBox checkBox2 = new JCheckBox("checkBox2");

        contentPane.add(checkBox1,BorderLayout.NORTH);
        contentPane.add(checkBox2,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setBounds(100,100,1000,1000);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo3();
    }
}

3.6列表

下拉框：

package com.sjy.lesson6;

import javax.swing.*;
import java.awt.*;

public class TestComboBoxDemo1 extends JFrame {

    public TestComboBoxDemo1() {

        Container contentPane = this.getContentPane();

        JComboBox<Object> jComboBox = new JComboBox<>();

        jComboBox.addItem(null);
        jComboBox.addItem("正在上映");
        jComboBox.addItem("已下架");
        jComboBox.addItem("即将上映");

        contentPane.add(jComboBox);


        this.setVisible(true);
        this.setBounds(100,100,500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboBoxDemo1();
    }
}

列表框：

package com.sjy.lesson6;

import javax.swing.*;
import java.awt.*;
import java.util.Vector;

public class TestComboBoxDemo2 extends JFrame {

    public TestComboBoxDemo2() {

        Container contentPane = this.getContentPane();

        //生成列表的内容
        String[] contents = {"1","2","3"};
        //列表中需要放入内容
        JList<String> stringJList = new JList<>(contents);
        contentPane.add(stringJList);

        Vector<Object> vector = new Vector<>();
        JList<Object> objectJList = new JList<>(vector);
        contentPane.add(objectJList);

        vector.add("张三");
        vector.add("李四");
        vector.add("王麻子");

        this.setVisible(true);
        this.setBounds(100,100,500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboBoxDemo2();
    }
}

应用场景：

选择地区，或者一些单个选项
列表，展示信息，一般是动态扩容！

3.7文本框

文本框：

package com.sjy.lesson6;

import javax.swing.*;
import java.awt.*;
import java.util.Vector;

public class TestTextDemo extends JFrame{
    public TestTextDemo() {

        Container contentPane = this.getContentPane();

        JTextField jTextField1 = new JTextField("hello");
        JTextField jTextField2 = new JTextField("world",20);

        contentPane.add(jTextField1,BorderLayout.NORTH);
        contentPane.add(jTextField2,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setBounds(100,100,500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo();
    }
}

密码框：

package com.sjy.lesson6;

import javax.swing.*;
import java.awt.*;

public class TestTextDemo2 extends JFrame{
    public TestTextDemo2() {

        Container contentPane = this.getContentPane();

        JPasswordField jPasswordField = new JPasswordField();
        jPasswordField.setEchoChar('*');

        contentPane.add(jPasswordField);


        this.setVisible(true);
        this.setBounds(100,100,500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo2();
    }
}

文本域：

package com.sjy.lesson5;

import javax.swing.*;
import java.awt.*;

public class JScrollDemo extends JFrame {

    public JScrollDemo() throws HeadlessException {
        Container contentPane = this.getContentPane();

        //文本域
        JTextArea jTextArea = new JTextArea(20, 50);
        jTextArea.setText("欢迎来到GUI编程");

        //Scroll面板
        JScrollPane jScrollPane = new JScrollPane(jTextArea);
        contentPane.add(jScrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JScrollDemo();
    }
}

GUI编程

GUI编程

1.简介

2.AWT底层实现

2.1Awt介绍

2.2组件和容器

窗口Frame

面板Panel

2.3布局管理器

2.4事件监听

2.5输入框TextField监听

2.6简易计算器，组合+内部类回顾复习！

2.7画笔paint

2.8鼠标监听

2.9窗口监听

2.10键盘监听

3.Swing界面

3.1窗口、面板JFrame

3.2弹窗JDialog

3.3标签

3.4面板

3.5按钮

3.6列表

3.7文本框

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