GUI编程基础一篇

GUI编程

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
破解工具

1、简介

Gui的核心技术：Swing AWT

为什么没有流行：

因为界面不美观。
需要jre环境。比较大。

为什么要学习：

写出自己心中像要的一些工具。
工作的时候，也可以需要维护到swing界面，很少。
了解MVC架构，和监听器。

2、AWT

2.1、Awt介绍

包含了很多的类和接口！GUI: 图形用户界面编程。
元素：窗口，文本框，按钮。
java.awt 包中。

在这里插入图片描述

2.2、组件和容器

1、Frame

package com.yanxun.book;

import java.awt.*;

public class TestFrame {
    public static void main(String[] args) {
        //Frame
        //窗口标题
        Frame frame = new Frame("我的第一个Java图形界面窗口");
        //设置窗口可见性
        frame.setVisible(true);
        //设置窗口大小
        frame.setSize(400, 400);
        //设置背景颜色
        frame.setBackground(new Color(131, 188, 212));
        //窗口弹出位置
        frame.setLocation(200, 200);//显示的左上角为0，0
        //将窗口固定不能拉伸, false窗口不可可拉升，true窗口可拉升
        frame.setResizable(false);
    }
}

效果图

在这里插入图片描述

问题：

窗口无法关闭！
panel代码中已经解决关闭问题

尝试回顾封装：

效果图：

在这里插入图片描述

package com.yanxun.book;

import java.awt.*;

public class TestFrame02 {
    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;//可能出现多个窗口,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Panel

解决了关闭问题

程序运行效果图：

在这里插入图片描述

package com.yanxun.book;

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

//Panel,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(40, 161, 35));

        //设置panel坐标，相对于frame，此时frame的左上角坐标为（0，0）
        panel.setBounds(50, 50, 400, 400);
        panel.setBackground(new Color(179, 68, 68));

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

        frame.setVisible(true);//设置可见

        //监听关闭监听事件，System.exit(0)
        //适配器模式
        frame.addWindowListener(new WindowAdapter() {
            //窗口关闭点击要做的事情
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

3、布局管理

流式布局

package com.yanxun.book;

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

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
        //默认为剧中对齐
        //frame.setLayout(new FlowLayout());
        //向右对齐
        //frame.setLayout(new FlowLayout(FlowLayout.RIGHT));
        //默认向左对齐
        frame.setLayout(new FlowLayout(FlowLayout.LEFT));
        frame.setSize(200, 200);

        //把按钮添加上去
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);

        frame.setVisible(true);
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

东西南北中

效果图

代码实现:

package com.yanxun.book;

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

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

        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.setVisible(true);

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

表格布局

package com.yanxun.book;

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

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

        Button bnt1 = new Button("bnt1");
        Button bnt2 = new Button("bnt2");
        Button bnt3 = new Button("bnt3");
        Button bnt4 = new Button("bnt4");
        Button bnt5 = new Button("bnt5");
        Button center = new Button("btn6");

        frame.setLayout(new GridLayout(3, 2));
        frame.add(bnt1);
        frame.add(bnt2);
        frame.add(bnt3);
        frame.add(bnt4);
        frame.add(bnt5);
        frame.add(center);

        frame.pack();//自动布局。
        frame.setVisible(true);
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

课堂练习：

效果图

代码：

package com.yanxun.book;

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

/**
 * 1.frame
 * 2.4个面板
 */
public class TestCourse {
    public static void main(String[] args) {
        Frame frame = new Frame();
        frame.setSize(400, 400);
        frame.setLocation(300, 400);
        frame.setBackground(Color.black);
        frame.setVisible(true);
        frame.setLayout(new GridLayout(2, 1));




        //4个面板
        //上部分的面板
        Panel p1 = new Panel(new BorderLayout());
        //放在p1面板中间的面板
        Panel p2 = new Panel(new GridLayout(2, 1));
        //下部分的面板
        Panel p3 = new Panel(new BorderLayout());
        //放在p3中间的面板
        Panel p4 = new Panel(new GridLayout(2, 1));

        p1.add(new Button("East-1"), BorderLayout.EAST);
        p1.add(new Button("West-1"), BorderLayout.WEST);

        p2.add(new Button("p2-bnt-1"));
        p2.add(new Button("p2-bnt-2"));

        p1.add(p2, BorderLayout.CENTER);

        p3.add(new Button("East-2"), BorderLayout.EAST);
        p3.add(new Button("West-2"), BorderLayout.WEST);

        for(int i = 0; i < 4; ++ i) {
            p4.add(new Button("for-" + i));
        }

        p3.add(p4, BorderLayout.CENTER);

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

一定要先分析

4、事件监听

多个按钮共享一个事件

package com.yanxun.book;

import javax.management.monitor.Monitor;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class TestActionEvent2 {
    public static void main(String[] args) {
        // 两个按钮， 实现同一监听
        //开始， 停止

        Frame frame = new Frame("开始，停止");

        Button button1 = new Button("start");
        Button button2 = new Button("stop");

        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);
    }
}

class MyMonitor implements ActionListener {

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("按钮被点击：" +  e.getActionCommand());
        if(e.getActionCommand().equals("start")){

        }else {

        }
    }
}

5、输入框TextField监听

package com.yanxun.test;

import org.w3c.dom.Text;

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 TestText {
    public static void main(String[] args) {
        //启动
        MyFrame myFrame = new MyFrame();
        myFrame.setSize(500, 500);
        windowClose(myFrame);

    }
    public static void windowClose(MyFrame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}
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();
        //按下回车就回触发输入框的事件
        textField.addActionListener(myActionListener2);

        //设置编码,显示像密码一样
        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
        String text = field.getText();//获得输入框中的文本
        System.out.println(text);
        field.setText("");//null
    }
}

6、简单计算器，组合+内部类回顾复习！

oop原则：组合，大于继承！

//组合
class A extends B {
    
}

class A {
    public B b;
    
}

完全改造成面向对象写法：

package com.yanxun.test;

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 TestCalc {
    public static void main(String[] args) {
        Calculator calculator = new Calculator();
        calculator.loadFrame();
        windowClose(calculator);

    }
    public static void windowClose(Calculator calculator){
        calculator.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}
//计算器类
class Calculator extends Frame {
    TextField num1, num2, num3;

    public void loadFrame(){


        setTitle("计算器");
        //三个文本框
        num1 = new TextField(10);
        num2 = new TextField(10);
        num3 = new TextField(20);
        //1个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener(this));
        //一个标签
        Label label = new Label("+");
        //布局
        setLayout(new FlowLayout());//流式布局
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);
        pack();
        setVisible(true);
    }
}

//监听器类
class MyCalculatorListener implements ActionListener {
    Calculator calculator = null;
    public MyCalculatorListener(Calculator calculator){
        this.calculator = calculator;
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        //获得加数
        int n1 = Integer.parseInt(this.calculator.num1.getText());
        int n2 = Integer.parseInt(this.calculator.num2.getText());

        //2.讲这个值+法运算后，放到第三个框框。
        this.calculator.num3.setText("" + (n1 + n2));
        //清除前两个框
        this.calculator.num1.setText("");
        this.calculator.num2.setText("");
    }
    //获取三个变量
}

效果图

内部类:

更好的包装

package com.yanxun.test;

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 TestCalc {
    public static void main(String[] args) {
        Calculator calculator = new Calculator();
        calculator.loadFrame();
        windowClose(calculator);

    }
    //关闭事件监听
    public static void windowClose(Calculator calculator){
        calculator.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}
//计算器类
class Calculator extends Frame {
    TextField num1, num2, num3;

    public void loadFrame(){


        setTitle("计算器");
        //三个文本框
        num1 = new TextField(10);
        num2 = new TextField(10);
        num3 = new TextField(20);
        //1个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener());
        //一个标签
        Label label = new Label("+");
        //布局
        setLayout(new FlowLayout());//流式布局
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);
        pack();
        setVisible(true);
    }
    //这是一个内部类
    private //监听器类
    class MyCalculatorListener implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent e) {
            //获得加数,将字符串转化成整形
            int n1 = Integer.parseInt(num1.getText());
            int n2 = Integer.parseInt(num2.getText());

            //2.讲这个值+法运算后，放到第三个框框。
            num3.setText("" + (n1 + n2));
            //清除前两个框
            num1.setText("");
            num2.setText("");
        }
        //获取三个变量
    }
}

7、画笔

package com.yanxun.test;

import java.awt.*;

public class TestPaint {
    public static void main(String[] args) {
        MyFrame1 myFrame1 = new MyFrame1();
        myFrame1.loadFrame();
    }
}

class MyFrame1 extends Frame {

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

    @Override
    public void paint(Graphics g) {
        //画笔需要颜色，画笔可以画画
        g.setColor(Color.red);
        //g.drawOval(100, 100, 100, 100);
        //填满的圆心
        g.fillOval(100, 100, 100, 100);
        //绿色的矩形
        g.setColor(Color.GREEN);
        g.fillRect(150, 200, 200, 200);

        //repaint();

        //画笔用完还原成最初的颜色
    }
}

效果图

在这里插入图片描述

8、鼠标监听

在这里插入图片描述

package com.yanxun.lesson3;

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

public class TestMouseListener {
    public static void main(String[] args) {
        MyFrame myFrame = new MyFrame("画图");
        windowClose(myFrame);
    }
    public static void windowClose(MyFrame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

class MyFrame extends Frame {

    //画画要画笔，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,也就式放到集合里面
    public void addPaint(Point point) {
        points.add(point);
    }


    public class MyMouseListener extends MouseAdapter {
        //鼠标事件有，按压，弹起，按住不放
        @Override
        public void mousePressed(MouseEvent e) {
            //拿到窗口句柄
            MyFrame myFrame = (MyFrame) e.getSource();
            //点击的时候界面上有个点
            myFrame.addPaint(new Point(e.getX(), e.getY()));

            //每次点击鼠标重新画一次
            repaint();
        }
    }
}

上边代码大致过程

9、窗口监听

package com.yanxun.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());
        //匿名内部类
        this.addWindowListener(new WindowAdapter() {
            //关闭窗口
            @Override
            public void windowClosing(WindowEvent e) {
                System.out.println("windowClosing");
                System.exit(0);
            }
            //激活窗口
            @Override
            public void windowActivated(WindowEvent e) {
                setTitle("激活成功");
                System.out.println("windowActivated");
            }


        });
    }

    class MyWindowListener extends WindowAdapter {
        @Override
        public void windowClosing(WindowEvent e) {
            setVisible(false);//隐藏窗口，
            //System.exit(0);//正常关闭
        }
    }

}

10、键盘监听

package com.yanxun.lesson3;

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

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.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        this.addKeyListener(new KeyAdapter() {
            //键盘按下
            @Override
            public void keyPressed(KeyEvent e) {
                //获得键盘按下的键位，当前的码
                int keyCode = e.getKeyCode();//直接使用静态属性，查看源代码
                System.out.println(keyCode);
                if (keyCode == KeyEvent.VK_UP) {
                    System.out.println("你按了上键");
                }
                //根据按件做对应的操作
                
            }
        });
    }

}

输出效果图：

在这里插入图片描述

3、Swing

3.1、窗口

package com.yanxun.test2;

import javax.swing.*;

public class JFrameDemo {
    //初始化
    public void init(){
        JFrame jframe = new JFrame("这是一个JFrame窗口");
        jframe.setVisible(true);
        jframe.setBounds(100, 100, 200, 200);
        //设置文字 JLabel
        JLabel label = new JLabel("欢迎学习java");

        jframe.add(label);

        //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();

    }
}

package com.yanxun.test2;

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

public class JFrameDemo2 extends JFrame {
    public static void main(String[] args) {
        new MyJFrame2().init();
    }

}
class MyJFrame2 extends JFrame {
    public void init() {
        this.setBounds(10, 10, 200, 300);
        this.setVisible(true);

        JLabel label = new JLabel("欢迎学习java");

        this.add(label);
        label.setHorizontalAlignment(SwingConstants.CENTER);

        //获得容器
        Container container = this.getContentPane();
        container.setBackground(Color.cyan);

        //关闭窗口事件
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

}

3.2、弹窗

package com.yanxun.test2;

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();//获取容器

        //绝对布局
        container.setLayout(null);
        //按钮
        JButton jButton = new JButton("点击一个对话框");//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() {//监听器
            @Override
            public void actionPerformed(ActionEvent e) {
                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 container = this.getContentPane();

        container.setLayout(null);

        container.add(new JLabel("学习java走上人生巅峰"));
    }
}

3.3、标签

label:

new Lable("内容");
new JLable("内容");

图标ICON

package com.yanxun.test2;

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

//图标是一个接口，需要实现类，Frame继承
public class IconDemo extends JFrame implements Icon {
    private int width;
    private int height;

    public IconDemo() {
    }

    public IconDemo(int width, int height) {
        this.width = width;
        this.height = height;
    }
    public void init() {
        IconDemo iconDemo = new IconDemo(15, 15);
        //图标放在标签上，也可以放在按钮上
        JLabel label = new JLabel("iconTest", iconDemo, SwingConstants.CENTER);
        setSize(200, 200);
        Container container = getContentPane();
        container.add(label);

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

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

图片ICON

package com.yanxun.test2;

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 label = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("LC11.jpg");
        ImageIcon imageIcon = new ImageIcon(url);
        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

下面代码的效果图

在这里插入图片描述

package com.yanxun.test5;

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

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

        container.setLayout(new GridLayout(2, 1, 10, 10));//后面参数是间距
		//定义了四个面板，并且都用表格布局
        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);//关闭


    }

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

JScrollPanel(有滚动条)

package com.yanxun.test5;

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

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

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

        //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 JScrollDemo();
    }
}

3.5、按钮

图片按钮

package com.yanxun.test5;

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

public class JButtonDemo01 extends JFrame {
    public JButtonDemo01(){
        Container container = this.getContentPane();
        URL resource = JButtonDemo01.class.getResource("LC11.jpg");

        Icon icon = new ImageIcon(resource);

        //把这个图标放在按钮上
        JButton jButton = new JButton();
        jButton.setIcon(icon);
        jButton.setToolTipText("鼠标放到按钮上的提示");

        //add
        container.add(jButton);

        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

效果图

package com.yanxun.test5;

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

public class JButtonDemo02 extends JFrame {
    public JButtonDemo02() {
        Container container = this.getContentPane();
        //将图片变为图标
        URL resource = JButtonDemo02.class.getResource("LC11.jpg");
        Icon icon = new ImageIcon(resource);

        //单选框
        JRadioButton radioButton1 = new JRadioButton("JRadioButton-1");
        JRadioButton radioButton2 = new JRadioButton("JRadioButton-2");
        JRadioButton radioButton3 = new JRadioButton("JRadioButton-3");

        //由于单选框只能选择一个，所以必须分组，也就是一组中只能选一个
        ButtonGroup group = new ButtonGroup();
        group.add(radioButton1);
        group.add(radioButton2);
        group.add(radioButton3);

        container.add(radioButton1, BorderLayout.CENTER);
        container.add(radioButton2, BorderLayout.NORTH);
        container.add(radioButton3, 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

效果图

代码：

package com.yanxun.test5;

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

public class JButtonDemo02 extends JFrame {
    public JButtonDemo02() {
        Container container = this.getContentPane();
        //将图片变为图标
        URL resource = JButtonDemo02.class.getResource("LC11.jpg");
        Icon icon = new ImageIcon(resource);

        //多选框
        JCheckBox checkBox1 = new JCheckBox("checkBox1");
        JCheckBox checkBox2 = new JCheckBox("checkBox2");
        JCheckBox checkBox3 = new JCheckBox("checkBox3");

        container.add(checkBox1, BorderLayout.NORTH);
        container.add(checkBox2, BorderLayout.CENTER);
        container.add(checkBox3, BorderLayout.SOUTH);

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

    }

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

应用场景

选择国家，或者一些单个选项

3.6、列表

下拉框

效果图

代码

package com.yanxun.test6;

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

public class TestComboxDemo1 extends JFrame {
    public TestComboxDemo1() {
        Container container = this.getContentPane();

        JComboBox box = new JComboBox();

        box.addItem("上映");
        box.addItem("下架");
        box.addItem(null);

        container.add(box);

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

    public static void main(String[] args) {
        new TestComboxDemo1();
    }
}

列表框

效果图

代码

package com.yanxun.test6;

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

public class TestComboxDemo2 extends JFrame {
    public TestComboxDemo2(){
        Container container = this.getContentPane();

        //生成列表内容
        //String[] contents = {"1", "2", "3"};
        Vector contents = new Vector();
        contents.add("1");
        contents.add("2");
        contents.add("3");
        //列表中需要放入的内容
        JList jList = new JList(contents);

        container.add(jList);

        this.setVisible(true);
        this.setSize(500, 200);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboxDemo2();
    }
}

3.7、文本框

文本框

效果图

在这里插入图片描述

package com.yanxun.Test7;

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

public class TestTextDemo1 extends JFrame {
    public TestTextDemo1() {
        Container container = this.getContentPane();

        //声明了一个文本框
        JTextField textField1 = new JTextField("hello");
        JTextField textField2 = new JTextField("world", 20);

        //监听事件
        textField1.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JTextField source = (JTextField) e.getSource();//获取文本框对象
                String text = source.getText();
                System.out.println(text);
                source.setText("");
            }
        });
        container.add(textField1, BorderLayout.NORTH);
        container.add(textField2, BorderLayout.SOUTH);


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

    public static void main(String[] args) {
        new TestTextDemo1();
    }
}

密码框

效果图

代码

package com.yanxun.Test7;

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

public class TextDemo3 extends JFrame {
    public TextDemo3() {
        Container container = this.getContentPane();

        //声明一个密码框
        JPasswordField passwordField = new JPasswordField();//*****
        passwordField.setEchoChar('*');

        container.add(passwordField);



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

    public static void main(String[] args) {
        new TextDemo3();
    }
}

文本域

效果图

package com.yanxun.test5;

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

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

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

        //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 JScrollDemo();
    }
}

完结撒花，估计没人能看到这里。## 标题

追求吾之所爱

GUI编程基础一篇

文章目录

GUI编程

1、简介

2、AWT

2.1、Awt介绍

2.2、组件和容器

1、Frame

2、面板Panel

3、布局管理

4、事件监听

5、输入框TextField监听

6、简单计算器，组合+内部类回顾复习！

7、画笔

8、鼠标监听

9、窗口监听

10、键盘监听

3、Swing

3.1、窗口

3.2、弹窗

3.3、标签

3.4、面板

3.5、按钮

3.6、列表

3.7、文本框