GUI编程

GUI编程

组件：

• 窗口
• 弹窗
• 面板
• 文本框
• 列表框
• 按钮
• 图片
• 监听时间
• 鼠标、
• 键盘事件
• 破解工具

1.简介

Gui的核心技术：Swing AWT

1.因为界面不美观！

2.需要jre环境！

为什么我们要学习？

1.可以写出自己心中想要的一些小工具！

2.工作的时候，也可能需要维护swing界面，概率极小！

3.了解MVC架构，了解监听！

2.AWT

2.1 Awt介绍

1、包含了很多类和接口！GUI：

2、元素：窗口、按钮、文本框

2.2 组件和容器

1.Frame

package com.ma;

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 f = new Frame("我的第一个Java图像界面窗口");

        //需要设置可见性 w  h
        f.setVisible(true);
        //设置窗口大小
        f.setSize(400,400);
        //设置背景颜色
        f.setBackground(new Color(85,150,68));
        //弹出的初始位置
        f.setLocation(200,200);
        //设置大小固定
        f.setResizable(false);
    }
}

问题：发现窗口关不掉-------停止运行java代码

尝试回顾封装

package com.ma;

import java.awt.*;

public class TestFrame2 {
    public static void main(String[] args) {
        //展示多个窗口
        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
    public MyFrame(int x,int y,int w, int h,Color color){
        super("Myframe"+(++id));
        setBackground(color);
        setBounds(x,y,w,h);
        setVisible(true);
    }
}

2.面板

解决了关闭事件

package com.ma;

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


//Panel可以看成一个空间，但是不能单独存在
public class TestPanel {
    public static void main(String[] args) {
        Frame frame = new Frame();
        //布局概念
        Panel panel = new Panel();
        //设置布局
        frame.setLayout(null);
        //坐标
        frame.setBounds(300,300,500,500);
        frame.setBackground(new Color(106, 217, 156));

        //pamel设置坐标，相当于frame
        panel.setBounds(50,50,400,400);
        panel.setBackground(new Color(234, 142, 142));

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

        frame.setVisible(true);

        //监听事件，监听窗口关闭事件
        //适配器模式：
        frame.addWindowListener(new WindowAdapter() {
            /**
             * Invoked when a window is in the process of being closed.
             * The close operation can be overridden at this point.
             * 窗口点击关闭时候需要做的事情
             * @param e
             */
            @Override
            public void windowClosing(WindowEvent e) {
                //结束程序
                System.exit(0);
            }
        });
    }
}

2.3 布局管理器

• 流式布局

•   package com.ma;
    
    import java.awt.*;
    
    public class tableFlowlLayout {
        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");
            
            //设置为流式布局
            //frame.setLayout(new FlowLayout());//居中
            //frame.setLayout(new FlowLayout(FlowLayout.LEFT));//靠左
            frame.setLayout(new FlowLayout(FlowLayout.RIGHT));//靠右
            
            frame.setSize(200,200);
            
            //把按钮添加上去
            frame.add(button1);
            frame.add(button2);
            frame.add(button3);
            
            frame.setVisible(true);
        }
    }
  

• 东西南北中

•   package com.ma;
    
    
    import java.awt.*;
    
    public class TestBordLayout {
        public static void main(String[] args) {
            Frame frame =new Frame(" TestBordLayout");
    
            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.ma;

import java.awt.*;

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

        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--自动布局

        frame.setVisible(true);

    }
}

练习：

package com.ma.lesson01;

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

public class ExDemo {
    public static void main(String[] args) {
        Frame frame = new Frame();
        frame.setVisible(true);
        frame.setLocation(300,400);
        frame.setSize(300,200);
        frame.setBackground(new Color(234, 142, 142));
        frame.setLayout(new GridLayout(2,1));

        //4个面板
        Panel p1 = new Panel(new BorderLayout());
        Panel p3 = new Panel(new BorderLayout());
        Panel p2 = new Panel(new GridLayout(2,1));
        Panel p4 = new Panel(new GridLayout(2,2));

        //上面ok
        p1.add(new Button("East-1"),BorderLayout.EAST);
        p1.add(new Button("West-1"),BorderLayout.WEST);
        p2.add(new Button("p2-btn-1"));
        p2.add(new Button("p2-btn-2"));
        p1.add(p2,BorderLayout.CENTER);
        //下面
        p3.add(new Button("East-2"),BorderLayout.EAST);
        p3.add(new Button("West-2"),BorderLayout.WEST);
        //中间的四个
        for (int i = 0; i < 4; i++) {
            p4.add(new Button("for-"+i));
        }
        p3.add(p4,BorderLayout.CENTER);

        frame.add(p1);
        frame.add(p3);

        frame.addWindowListener(new WindowAdapter() {
            /**
             * Invoked when a window is in the process of being closed.
             * The close operation can be overridden at this point.
             *
             * @param e
             */
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

总结：

1.Frame是一个顶级窗口

2.panel无法单独显示，必须添加到容器中

3.布局管理器

​ 1.流式

​ 2.东西南北中

​ 3.表格

4.大小，定位，背景颜色，可见性，监听

2.4 事件监听

事件监听：当某事发生的时候干什么？

package com.ma.lesson02;

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();

        //因为addActionListener()需要一个 ActionListener，所以我们需要构建一个 ActionListener
       MyActionListener myActionListener = new MyActionListener();
        button.addActionListener(myActionListener);

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


    }

    //关闭窗体的事件
    private static void windowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            /**
             * Invoked when a window is in the process of being closed.
             * The close operation can be overridden at this point.
             *
             * @param e
             */
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

class MyActionListener implements ActionListener{

    /**
     * Invoked when an action occurs.
     *
     * @param e
     */
    @Override
    public void actionPerformed(ActionEvent e) {

        System.out.println("aaa");
    }
}

多个按钮共享一个事件

package com.ma.lesson02;

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


public class TextAction {
    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");

        //可以显示的定义出发返回的命令，如果不显示定义定义，则会走默认值
        //可以多个按钮只写一个监听类
        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);
    }
}
class MyMonitor implements ActionListener{

    /**
     * Invoked when an action occurs.
     *
     * @param e
     */
    @Override
    public void actionPerformed(ActionEvent e) {
        //获得按钮的信息
        System.out.println("按钮被点击了：msg"+e.getActionCommand());
        /*if(e.getActionCommand().equals("start")){
            
        }*/
    }
}

2.5 输入框TextField监听

package com.ma.lesson02;

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


public class TextText01 {
    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{

    /**
     * Invoked when an action occurs.
     *
     * @param e
     */
    @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 ""
    }
}

2.6 建议计算器，组合＋内部类回顾复习

oop原则：组合大于继承

package com.ma.lesson02;

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

//简易计算器
public class TextCalc {
    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);
        TextField num3 = new TextField(20);
        //1个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener(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 MyCalculatorListener implements ActionListener{

    //获取三个变量
    private TextField num1,num2,num3;
    public MyCalculatorListener(TextField num1,TextField num2,TextField num3){
        this.num1 =num1;
        this.num2 =num2;
        this.num3 =num3;

    }
    /**
     * Invoked when an action occurs.
     *
     * @param e
     */
    @Override
    public void actionPerformed(ActionEvent e) {

        //1.获取加数和被加数
        int n1 = Integer.parseInt(num1.getText());
        int n2 = Integer.parseInt(num2.getText());

        //2.将这个值加法运算后放到第三个框
        num3.setText(""+(n1+n2));
        //3.清除前两个框
        num1.setText("");
        num2.setText("");
    }
}

完全改造为面向对象

package com.ma.lesson02;

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


//简易计算器
public class TextCalc {
    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(){
        num1 = new TextField(10);
        num2 = new TextField(10);
        num3 = new TextField(20);
        Button button = new Button("=");
        Label label = new Label("+");

        button.addActionListener(new MyCalculatorListener(this));

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

        pack();
        setVisible(true);
    }
}

//监听器类
class MyCalculatorListener implements ActionListener{

    //获取计算器这个对象,在一个类中组合另外一个类
    Calculator calculator = null;
    public MyCalculatorListener(Calculator calculator){
        this.calculator =calculator;

    }
    /**
     * Invoked when an action occurs.
     *
     * @param e
     */
    @Override
    public void actionPerformed(ActionEvent e) {

        //1.获取加数和被加数
        //2.将这个值加法运算后放到第三个框
        //3.清除前两个框
        int n1 = Integer.parseInt(calculator.num1.getText());
        int n2 = Integer.parseInt(calculator.num2.getText());
        calculator.num3.setText(""+(n1+n2));
        calculator.num1.setText("");
        calculator.num2.setText("");
    }
}

内部类

package com.ma.lesson02;

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


//简易计算器
public class TextCalc {
    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(){
        num1 = new TextField(10);
        num2 = new TextField(10);
        num3 = new TextField(20);
        Button button = new Button("=");
        Label label = new Label("+");

        button.addActionListener(new MyCalculatorListener());

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

        pack();
        setVisible(true);
    }
    //监听器类
    //内部类的最大好处就是可以畅通无阻的访问外部类的属性和方法
    private class MyCalculatorListener implements ActionListener{

        @Override
        public void actionPerformed(ActionEvent e) {

            //1.获取加数和被加数
            //2.将这个值加法运算后放到第三个框
            //3.清除前两个框
            int n1 = Integer.parseInt(num1.getText());
            int n2 = Integer.parseInt(num2.getText());
            num3.setText(""+(n1+n2));
            num1.setText("");
            num2.setText("");
        }
    }
}

2.7画笔

package com.ma.lesson03;


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) {
        //画笔需要有颜色，画笔可以花花
        g.setColor(Color.red);
        g.drawOval(100,100,100,100);//圆
        g.fillOval(200,100,100,100);//实心圆

        g.setColor(Color.green);
        g.fillRect(150,200,200,200);

        //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.ma.lesson03;

import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
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<>();

        setVisible(true);
        //鼠标监听器，正对这个窗口
        this.addMouseListener(new MyMouseListener());
    }


    @Override
    public void paint(Graphics 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);
    }
    //适配器模式
    private class MyMouseListener extends MouseAdapter{
        //鼠标  按下，弹起，按住不放
        @Override
        public void mousePressed(MouseEvent e) {
            MyFrame frame =(MyFrame) e.getSource();
            //这里我们点击的时候，就会在界面上产生一个点！画
            //这个点就是鼠标的点
            frame.addPaint(new Point(e.getX(),e.getY()));
            //每次点击鼠标都需要重新画一次
            frame.repaint();//刷新  30帧  60帧
        }
    }
}

2.9窗口监听

package com.ma.lesson03;

import com.sun.glass.ui.ClipboardAssistance;

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) {
            setVisible(false);//隐藏窗口，通过按钮，隐藏当前窗口
            System.exit(0);//正常退出
        }
    }
}

package com.ma.lesson03;

import com.sun.glass.ui.ClipboardAssistance;

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());
        this.addWindowListener(
                //匿名内部类
                new WindowAdapter() {
                    //关闭窗口
                    @Override
                    public void windowClosing(WindowEvent e) {
                        System.out.println("windowEvent");
                        System.exit(0);
                    }
                    //激活窗口
                    @Override
                    public void windowActivated(WindowEvent e) {
                        WindowFrame source = (WindowFrame)e.getSource();
                        source.setTitle("被激活了");
                        System.out.println("windowActivated");
                    }
                }
        );
    }
}

2.10键盘监听

package com.ma.lesson03;

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

//键
public class TestKeyListener {
    public static void main(String[] args) {
        new KeyFrame();
    }
}
class KeyFrame extends Frame{
    public KeyFrame(){
        setBounds(1,2,300,400);
        setVisible(true);

        this.addKeyListener(new KeyAdapter() {
            //键盘按下
            @Override
            public void keyPressed(KeyEvent e) {
                //获得键盘按下的键是哪一个
                int keyCode = e.getKeyCode();//不需要记录这个数值，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");
                }
                //根据按下不同的键执行不同的操作
            }
        });
    }
}

3.Swing

3.1窗口，面板

package com.ma.lesson04;

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

public class JFrameDemo {
    //init():初始化
    public void init(){
        JFrame jf = new JFrame("这是一个JFrame窗口");
        jf.setVisible(true);
        jf.setBounds(100,100,200,200);
        jf.setBackground(Color.cyan);
        //设置文字
        JLabel label = new JLabel("欢迎");
        jf.add(label);

        //关闭事件
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

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

标签居中

package com.ma.lesson04;


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

public class JfeameDemo02 {
    public static void main(String[] args) {
        new MyJframe2().init();
    }
}
class MyJframe2 extends JFrame{

    public void init(){

        this.setVisible(true);
        this.setBounds(10,10,200,300);

        JLabel label = new JLabel("欢迎");
        this.add(label);

        //让文本标签居中  设置水平对齐
        label.setHorizontalAlignment(SwingConstants.CENTER);
        //获得一个容器
        Container contentPane = this.getContentPane();
        contentPane.setBackground(Color.blue);
    }
}

3.2弹窗

JDialog，用来被弹出，默认就有关闭事件

`package com.ma.lesson04;

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

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

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

        container.add(button);
    }

    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 container = this.getContentPane();
        container.setLayout(null);

        container.add(new Label("yyyyyy"));
    }
}`

3.3标签

label

new JLable

图标Icon

package com.ma.lesson04;

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

//图标，需要实现类，Frame继承
public class IconDemo extends JFrame implements Icon {
    private int width;
    private int height;

    public IconDemo(){}//无参构造
    public IconDemo(int width,int height){
        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 label = new JLabel("icontest", iconDemo, SwingConstants.CENTER);

        Container container = getContentPane();
        container.add(label);

        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.ma.lesson04;

import com.sun.org.omg.CORBA.ContextIdSeqHelper;

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

public class ImageIconDemo extends JFrame {
    public ImageIconDemo()  {
        //获取图片地址
        JLabel label = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("tx.jpg");

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

        Container container = getContentPane();
        container.add(label);

        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setBounds(100,100,200,200);
    }

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

3.4面板

JPanel

package com.ma.lesson05;

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

public class JPanelDemo extends JFrame {
    public JPanelDemo() {
        Container container = this.getContentPane();

        container.setLayout(new GridLayout(2,1,10,10));//后面参数的意思，间距

        JPanel panel1 = new JPanel(new GridLayout(1,3));
        JPanel panel2 = new JPanel(new GridLayout(1,2));
        JPanel panel3 = new JPanel(new GridLayout(2,1));
        JPanel panel4 = new JPanel(new GridLayout(3,2));

        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));
        panel2.add(new JButton("2"));
        panel2.add(new JButton("2"));
        panel3.add(new JButton("3"));
        panel3.add(new JButton("3"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));

        container.add(panel1);
        container.add(panel2);
        container.add(panel3);
        container.add(panel4);

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

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

JScroPanel

package com.ma.lesson05;


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

public class JScroPanelDemo extends JFrame {
    public JScroPanelDemo() {
        Container container = this.getContentPane();

        //文本域
        JTextArea textArea = new JTextArea(20,50);
        textArea.setText("欢迎");

        //Scroll面板
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);
        
        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {

        new JScroPanelDemo();
    }
}

3.5按钮

图片按钮

package com.ma.lesson05;

import com.ma.lesson04.ImageIconDemo;

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

public class JButtonDemo01 extends JFrame {
    public JButtonDemo01(){

        Container container = this.getContentPane();
        //将一个图片变为图标
        URL resource = JButtonDemo01.class.getResource("tx.jpg");
        Icon icon = new ImageIcon(resource);
        //把这个图标放在按钮上
        JButton button = new JButton();
        button.setIcon(icon);
        button.setToolTipText("图片按钮");
        //add
        container.add(button);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo01();
    }
}

单选按钮

package com.ma.lesson05;

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

public class JButtonDemo02 extends JFrame {
    public JButtonDemo02(){

        Container container = this.getContentPane();

        //单选框
        JRadioButton jRadioButton01 = new JRadioButton("jRadioButton01");
        JRadioButton jRadioButton02 = new JRadioButton("jRadioButton02");
        JRadioButton jRadioButton03 = new JRadioButton("jRadioButton03");

        //由于单选框只能选择一个，分组,一个组中只能选择一个
        ButtonGroup group = new ButtonGroup();
        group.add(jRadioButton01);
        group.add(jRadioButton02);
        group.add(jRadioButton03);

        container.add(jRadioButton01,BorderLayout.CENTER);
        container.add(jRadioButton02,BorderLayout.NORTH);
        container.add(jRadioButton03,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo02();
    }
}

复选按钮

package com.ma.lesson05;

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

public class JButtonDemo03 extends JFrame {
    public JButtonDemo03(){

        Container container = this.getContentPane();

        //多选框
        JCheckBox checkBox01 = new JCheckBox("checkBox01");
        JCheckBox checkBox02 = new JCheckBox("checkBox02");

        container.add(checkBox01,BorderLayout.NORTH);
        container.add(checkBox02,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo03();
    }
}

3.6列表

下拉框

package com.ma.lesson06;

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

public class TestComboboxDemo01 extends JFrame {
    public TestComboboxDemo01() {
        Container container = this.getContentPane();

        JComboBox status = new JComboBox();

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

        container.add(status);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {

        new TestComboboxDemo01();
    }
}

列表框

package com.ma.lesson06;

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

public class TestComboboxDemo02 extends JFrame {
    public TestComboboxDemo02() {
        Container container = this.getContentPane();

        //生成列表的内容
        //String[] contents = {"1","2","3"};
        Vector contents = new Vector();
        //列表中需要放入内容
        JList list = new JList(contents);

        contents.add("zhangsan");
        contents.add("lisi");
        contents.add("wangwu");
        
        container.add(list);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {

        new TestComboboxDemo02();
    }
}

• 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.ma.lesson06;


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

public class TestTextDemo01 extends JFrame {
    public TestTextDemo01() {
        Container container = this.getContentPane();

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

        container.add(jPasswordField);



        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {

        new TestTextDemo01();
    }
}

密码框

package com.ma.lesson06;


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

public class TestTextDemo02 extends JFrame {
    public TestTextDemo02() {
        Container container = this.getContentPane();

        JTextField textField = new JTextField("hello");
        JTextField textField2 = new JTextField("world",20);
        container.add(textField,BorderLayout.NORTH);
        container.add(textField2,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {

        new TestTextDemo02();
    }
}

文本域

package com.ma.lesson05;


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

public class JScroPanelDemo extends JFrame {
    public JScroPanelDemo() {
        Container container = this.getContentPane();

        //文本域
        JTextArea textArea = new JTextArea(20,50);
        textArea.setText("欢迎");

        //Scroll面板
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);
        
        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {

        new JScroPanelDemo();
    }
}