Java-GUI篇

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破解工具 1. 简介

GUI的核心技术：Swing、AWT
缺点：

界面不美观需要jre环境

用处：

可以写自己需要的小工具了解MVC架构，了解监听 2. AWT 2.1 AWT 简介

AWT包含很多类和接口！GUI：图形用户界面编程元素：窗口，按钮，文本框java.awt 2.2 组件和容器

frame

package top.cxy96.java_GUI.lesson1;

import java.awt.*;
public class Testframe {
    public static void main(String[] args) {
        // frame
        frame frame = new frame("Java图形界面窗口");

        // 设置可见性
        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(121, 59, 59));

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

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

运行结果：

封装实现多个弹窗：

package top.cxy96.java_GUI.lesson1;

import java.awt.*;

public class Testframe2 {
    public static void main(String[] args) {
        // 展示多个窗口
        new Myframe(100,100,200,200,Color.BLACK);
        new Myframe(300,100,200,200,Color.BLACK);
        new Myframe(100,300,200,200,Color.BLACK);
        new Myframe(300,300,200,200,Color.BLACK);
    }
}
class Myframe extends frame{
    static int id = 0 ;   // 计窗口数
    public Myframe(int x,int y,int w,int h,Color color){
        super("Myframe"+(++id));
        setBackground(color);
        setBounds(x,y,w,h);
        setVisible(true);
    }
}

面板Panel

package top.cxy96.java_GUI.lesson1;

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

// Panel 不能单独存在
public class TestPanel {
    public static void main(String[] args) {
        frame frame = new frame();

        Panel panel = new Panel();

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

        // 坐标
        frame.setBounds(300,300,500,500);
        frame.setBackground(new Color(99, 229, 18));

        // panel设置坐标,相对于frame
        panel.setBounds(50,50,400,400);
        panel.setBackground(new Color(1,1,1));

        // 将面板放到窗口
        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() {
            // 窗口关闭要做的事情
            @Override
            public void windowClosing(WindowEvent e) {
                // 结束程序
                System.exit(0);
            }
        });
    }
}

运行结果：

布局管理器

流式布局

package top.cxy96.java_GUI.lesson1;

import java.awt.*;

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

        //　组件--按钮
        Button button1=new Button("buttton1");
        Button button2=new Button("buttton2");
        Button button3=new Button("buttton3");

        // 设为流式布局
        // 默认居中
        // frame.setLayout(new FlowLayout());
        frame.setLayout(new FlowLayout(FlowLayout.LEFT));  // 居左

        frame.setSize(200,200);

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

        // 设置可见
        frame.setVisible(true);
    }
}

运行结果：
[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-7lX9oACu-1646581121390)(https://cdn.jsdelivr.net/gh/cxy20219/image/images/Demo_GUI_Demo3.png)]

东西南北中

package top.cxy96.java_GUI.lesson1;

import java.awt.*;

public abstract class TestBorderLayout {
    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(north,BorderLayout.NORTH);
        frame.add(south,BorderLayout.SOUTH);
        frame.add(center,BorderLayout.CENTER);

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

表格布局

package top.cxy96.java_GUI.lesson1;

import java.awt.*;

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

        Button bt1 = new Button("button1");
        Button bt2 = new Button("button2");
        Button bt3 = new Button("button3");
        Button bt4 = new Button("button4");
        Button bt5 = new Button("button5");
        Button bt6 = new Button("button6");

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

        frame.add(bt1);
        frame.add(bt2);
        frame.add(bt3);
        frame.add(bt4);
        frame.add(bt5);
        frame.add(bt6);

        frame.pack(); // Java函数 自动布局
        frame.setVisible(true);

    }
}

运行结果：

综合案列

效果展示：

代码：

package top.cxy96.java_GUI.lesson1;

import java.awt.*;

public class Demo {
    public static void main(String[] args) {
        // 大的窗口
        frame frame = new frame();
        // 两行一列
        frame.setLayout(new GridLayout(2,1));
        // 设置大小
        frame.setSize(400,300);
        // 设置位置
        frame.setLocation(300,400);
        // 设置背景颜色
        frame.setBackground(Color.black);
        // 设置可见
        frame.setVisible(true);

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

        // 按钮
        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"));

        // 将表格布局放在中间
        p1.add(p2,BorderLayout.CENTER);

        // 按钮
        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("p4-btn-"+i));
        }

        // 将表格布局放在中间
        p1.add(p2,BorderLayout.CENTER);
        p3.add(p4,BorderLayout.CENTER);

        // 将面板放在frame里面
        frame.add(p1);
        frame.add(p3);
    }
}

3. 事件监听 3.1 按钮监听事件

代码：

package top.cxy96.java_GUI.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 TestAction {
    public static void main(String[] args) {
        // 按下按钮发生事件
        frame frame = new frame();
        Button button = new Button("clik");

        // 构造一个ActionListener
        MyActionListener myActionListener = new MyActionListener();

        button.addActionListener(myActionListener);

        frame.add(button,BorderLayout.CENTER);

        frame.pack();
        frame.setVisible(true);

        // 关闭窗口
        windowColse(frame);
    }
    // 关闭窗体事件
    private static void windowColse(frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}
class MyActionListener implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        // 点击按钮时打印aaa
        System.out.println("aaa");
        // 获取按钮上的信息
        System.out.println("按钮："+e.getActionCommand());
    }
}

3.2. 输入框监听事件

代码：

package top.cxy96.java_GUI.lesson2;

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

public class TestText01 {
    public static void main(String[] args) {
        Myframe myframe = new Myframe();
    }
}
class Myframe extends frame{
    public Myframe(){
        TextField textField = new TextField();
        add(textField);

        // 监听文本框输入的文字
        MyActionListener2 myActionListener2 = new MyActionListener2();
        // 按下Enter触发事件
        textField.addActionListener(myActionListener2);

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

    }
}

class MyActionListener2 implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
        // 获得一些资源 , 返回一个对象 ，强转TextField
        TextField field = (TextField)e.getSource();
        String messge = field.getText();   // 获取输入框的文本
        System.out.println(messge);

        // 清空输入框的文本
        field.setText(null);  // "" 或 null
    }
}

3.3 简易计算器实现代码

package top.cxy96.java_GUI.lesson2;

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

public class SimpleCalculator {
    public static void main(String[] args) {
        Calculator calculator = new Calculator();
    }
}
// 计算器类
class Calculator extends frame{
    public Calculator(){
        // 3个文本框
        TextField textField1 = new TextField(10); // 字符数
        TextField textField2 = new TextField(10); // 字符数
        TextField textField3 = new TextField(20); // 字符数
        
        // 1个按钮
        Button button = new Button("=");

        button.addActionListener(new MyCalculatorListener(textField1,textField2,textField3));
        // 一个标签
        Label label = new Label("+");

        // 布局
        setLayout(new FlowLayout());

        add(textField1);
        add(label);
        add(textField2);
        add(button);
        add(textField3);
        
        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;
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        // 获得加数与被加数
        int n1 = Integer.parseInt(num1.getText());
        int n2 = Integer.parseInt(num2.getText());

        // 将运算后的值放到第三个框
        num3.setText(""+(n1+n2));

        // 清除前两个框
        num1.setText(null);
        num2.setText(null);
    }
}

结果演示：

代码优化(组合类)

package top.cxy96.java_GUI.lesson2;

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

public class SimpleCalculator {
    public static void main(String[] args) {
        new Calculator().loadframe();
    }
}
// 计算器类
class Calculator extends frame{
    // 属性
    TextField textField1,textField2,textField3;

    // 方法
    public void loadframe() {
        // 3个文本框
        textField1 = new TextField(10); // 字符数
        textField2 = new TextField(10); // 字符数
        textField3 = new TextField(20); // 字符数

        // 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());

        add(textField1);
        add(label);
        add(textField2);
        add(button);
        add(textField3);

        pack();
        setVisible(true);
    }
}
// 监听器类
class MyCalculatorListener implements ActionListener{
    // 获取计算器对象  在一个类中组合另一个类
    Calculator calculator = null;
    public MyCalculatorListener(Calculator calculator){
        this.calculator = calculator;
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        // 获得加数与被加数
        int n1 = Integer.parseInt(calculator.textField1.getText());
        int n2 = Integer.parseInt(calculator.textField2.getText());

        // 将运算后的值放到第三个框
        calculator.textField3.setText(""+(n1+n2));

        // 清除前两个框
        calculator.textField1.setText(null);
        calculator.textField2.setText(null);
    }
}

代码优化(类部类)

package top.cxy96.java_GUI.lesson2;

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

public class SimpleCalculator {
    public static void main(String[] args) {
        new Calculator().loadframe();
    }
}
// 计算器类
class Calculator extends frame{
    // 属性
    TextField textField1,textField2,textField3;

    // 方法
    public void loadframe() {
        // 3个文本框
        textField1 = new TextField(10); // 字符数
        textField2 = new TextField(10); // 字符数
        textField3 = new TextField(20); // 字符数

        // 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());

        add(textField1);
        add(label);
        add(textField2);
        add(button);
        add(textField3);

        pack();
        setVisible(true);
    }
    // 监听器类
    private class MyCalculatorListener implements ActionListener{
        @Override
        public void actionPerformed(ActionEvent e) {
            // 获得加数与被加数
            int n1 = Integer.parseInt(textField1.getText());
            int n2 = Integer.parseInt(textField2.getText());

            // 将运算后的值放到第三个框
            textField3.setText(""+(n1+n2));

            // 清除前两个框
            textField1.setText(null);
            textField2.setText(null);
        }
    }
}

3.4 画笔

代码：

package top.cxy96.java_GUI.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);
        // 画笔颜色
        g.setColor(Color.red);

        // 画
        g.drawOval(100,100,100,100); // 圆

        g.fillOval(200,200,100,100); // 实心圆

        g.setColor(Color.green);
        g.fillRect(100,300,100,100); // 矩形
        
        // 画笔用完还原到最初颜色
        
    }
}

结果演示：
[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-zkLuBeGw-1646581121400)(https://cdn.jsdelivr.net/gh/cxy20219/image/images/Demo_GUI_Demo9.png)]

3.5 鼠标监听

代码：

package top.cxy96.java_GUI.lesson3;

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

public class TestMouseListener {
    public static void main(String[] args) {
        new Myframe("画画");
    }
}

class Myframe extends frame{
    // 画画需要画笔，首先监听当前的位置，需要集合来存储这个点
    ArrayList points;
    public Myframe(String title){
        super(title);
        setBounds(200,200,600,500);

        // 存储鼠标点击的点
        points = new ArrayList<>();
        // 鼠标监听器
        this.addMouseListener(new MyMouseListener());

        setVisible(true);
    }

    @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.red);
            g.fillOval(point.x,point.y,10,10);
        }
    }

    // 添加一个点在界面上
    public void addPoint(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 myframe = (Myframe) e.getSource();

            myframe.addPoint(new Point(e.getX(),e.getY()));

            // 每次点击都需要重新画一遍
            myframe.repaint(); // 刷新
        }
    }
}

结果演示：
[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-2J2rnYud-1646581121400)(https://cdn.jsdelivr.net/gh/cxy20219/image/images/Demo_GUI_Demo10.png)]

3.6 窗口监听

package top.cxy96.java_GUI.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(){
        setBounds(200,200,600,500);
        setVisible(true);
        // addWindowListener(new MyWindowListener());
        addWindowListener(
                // 匿名内部类
                new WindowAdapter() {
                    @Override
                    public void windowOpened(WindowEvent e) {
                        System.out.println("窗口打开");
                    }

                    @Override
                    public void windowActivated(WindowEvent e) {
                        System.out.println("窗口激活");
                    }

                    @Override
                    public void windowClosing(WindowEvent e) {
                        System.out.println("你点击了×");
                    }
                }
        );
    }
    class MyWindowListener extends WindowAdapter{
        @Override
        public void windowClosing(WindowEvent e) {
            setVisible(false);  // 隐藏窗口
            System.exit(0);  // 正常退出
        }
    }
}

3.7 键盘监听

package top.cxy96.java_GUI.lesson3;

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

public class TestKeyLisenser {
    public static void main(String[] args) {
        new Keyframe();
    }
}
class Keyframe extends frame{
    public Keyframe(){
        setBounds(200,200,600,500);
        setVisible(true);

        addKeyListener(new KeyAdapter() {
            // 键盘按下
            @Override
            public void keyPressed(KeyEvent e) {
                // 获取键盘的码
                int keyCode = e.getKeyCode();
                System.out.println(keyCode);
                if(keyCode == KeyEvent.VK_UP){
                    System.out.println("按下上键");
                }
            }
        });
    }
}

4. Swing 4.1 窗口、面板

代码：

package top.cxy96.java_GUI.lesson4;

import javax.swing.*;

public class JframeDemo {
    //init() 初始化
    public void init(){
        // 顶级窗口
        Jframe frame = new Jframe("这是一个Jframe窗口");
        frame.setVisible(true);
        frame.setBounds(100,100,200,200);

        // 设置文字 JLabel
        JLabel jLabel = new JLabel("Java学习");
        frame.add(jLabel);

        // 容器实例化


        // 关闭事件
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        // 建立一个窗口
        new JframeDemo().init();

    }
}

结果：

让文字居中
代码：

package top.cxy96.java_GUI.lesson4;

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

public class JframeDemo2 {
    public static void main(String[] args) {
        new Myframe().init();
    }
}
class Myframe extends Jframe{
    public void init(){
        this.setBounds(10,10,200,300);
        this.setVisible(true);
        JLabel jLabel = new JLabel("JavaGUI学习");
        this.add(jLabel);

        // 让文本标签居中 设置水平对齐
        jLabel.setHorizontalAlignment(SwingConstants.CENTER);

        // 获得一个容器
        Container contentPane = this.getContentPane();
        contentPane.setBackground(Color.BLUE);

    }
}

结果：
[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-G4oZzKAM-1646581121402)(https://cdn.jsdelivr.net/gh/cxy20219/image/images/Demo_GUI_Demo12.png)]

4.2 弹窗

package top.cxy96.java_GUI.lesson4;

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

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

        // Jframe 容器
        Container container = this.getContentPane();
        // 绝对布局
        container.setLayout(null);

        // 按钮
        JButton jButton = new JButton("点击弹出对话窗");
        jButton.setBounds(30,30,200,50);

        // 点击按钮时，弹出弹窗
        jButton.addActionListener(new ActionListener() {
            //　监听器
            @Override
            public void actionPerformed(ActionEvent e) {
                // 弹窗
                new MyDialogDemo();
            }
        });
        container.add(jButton);
    }
    public static void main(String[] args) {
        new DialogDemo();
    }
}
// 弹窗窗口
class MyDialogDemo extends JDialog{
    public MyDialogDemo() {
        this.setVisible(true);
        this.setBounds(100,100,500,500);
        // this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);  // 默认有关闭事件

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

        contentPane.add(new Label("hello"));
    }
}

4.3 标签

label

new JLabel("xxx");

图标 ICON

package top.cxy96.java_GUI.lesson5;

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");
        // 同级目录下
        URL url = ImageIconDemo.class.getResource("man.jpg");
        ImageIcon imageIcon = new ImageIcon(url);
        label.setIcon(imageIcon);
        label.setHorizontalAlignment(SwingConstants.CENTER);

        Container contentPane = getContentPane();
        contentPane.add(label);
        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setBounds(100,100,200,200);
    }
    public static void main(String[] args) {
        new ImageIconDemo();
    }
}

4.4 面板

Panel

package top.cxy96.java_GUI.lesson6;

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

public class Jpanel extends Jframe {
    public Jpanel(){
        Container contentPane = this.getContentPane();
        contentPane.setLayout(new GridLayout(2,1,10,10)); // 后面参数间距
        JPanel jPanel = new JPanel(new GridLayout(1,3));
        jPanel.add(new JButton("1"));
        jPanel.add(new JButton("2"));
        jPanel.add(new JButton("3"));
        contentPane.add(jPanel);
        this.setVisible(true);
        this.setSize(500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

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

结果：

JScrollPanel

package top.cxy96.java_GUI.lesson6;

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

public class JScrollDemoDemo extends Jframe {
    public JScrollDemoDemo() {
        Container contentPane = this.getContentPane();

        // 文本域
        Jtextarea jtextarea = new Jtextarea(20,50);
        jtextarea.setText("学Java认识Java");
        contentPane.add(jtextarea);

        // 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 JScrollDemoDemo();
    }
}

结果：

4,5 按钮

图片按钮

package top.cxy96.java_GUI.lesson6;

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

public class JButtonDemo01 extends Jframe {
    public JButtonDemo01(){
        Container contentPane = this.getContentPane();
        URL url = JButtonDemo01.class.getResource("man.jpg");
        // 将图片变为图标
        ImageIcon imageIcon = new ImageIcon(url);

        // 把图标放在按钮上
        JButton jButton = new JButton();
        jButton.setIcon(imageIcon);
        jButton.setToolTipText("图片按钮");

        // 按钮加到容器上
        contentPane.add(jButton);
        this.setVisible(true);
        this.setBounds(100,200,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

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

结果：

单选按钮

package top.cxy96.java_GUI.lesson6;

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

public class JButtonDemo02 extends Jframe {
    public JButtonDemo02() {
        Container contentPane = this.getContentPane();
        URL resource = JButtonDemo02.class.getResource("man.jpg");
        ImageIcon imageIcon = new ImageIcon(resource);

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

        // 单选框一般会分为一组,一个组中只能选择一个
        ButtonGroup buttonGroup = new ButtonGroup();
        buttonGroup.add(jRadioButton1);
        buttonGroup.add(jRadioButton2);
        buttonGroup.add(jRadioButton3);

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

        this.setVisible(true);
        this.setBounds(100,200,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

结果：
[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-HDgHpIOs-1646581121406)(https://cdn.jsdelivr.net/gh/cxy20219/image/images/Demo_GUI_Demo16.png)]

多选按钮

package top.cxy96.java_GUI.lesson6;

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

public class JButtonDemo03 extends Jframe{
    public JButtonDemo03() {
        Container contentPane = this.getContentPane();
        URL resource = JButtonDemo02.class.getResource("man.jpg");
        ImageIcon imageIcon = new ImageIcon(resource);

        // 多选框
        JCheckBox jCheckBox1 = new JCheckBox("jCheckBox1");
        JCheckBox jCheckBox2 = new JCheckBox("jCheckBox2");
        JCheckBox jCheckBox3 = new JCheckBox("jCheckBox3");

        contentPane.add(jCheckBox1,BorderLayout.NORTH);
        contentPane.add(jCheckBox2,BorderLayout.SOUTH);
        contentPane.add(jCheckBox3,BorderLayout.CENTER);

        this.setVisible(true);
        this.setBounds(100,200,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

结果：

4.6 列表

下拉框

package top.cxy96.java_GUI.lesson7;

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

public class TestComboboxDemo01 extends Jframe {
    public TestComboboxDemo01() {
        Container contentPane = this.getContentPane();
        JComboBox status = new JComboBox();

        status.addItem(null);
        status.addItem("正在上映");
        status.addItem("已下架");
        status.addItem("正在热映");

        contentPane.add(status);


        this.setVisible(true);
        this.setBounds(100,200,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo01();
    }
}

结果：

列表框

package top.cxy96.java_GUI.lesson7;

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

public class TestComboboxDemo02 extends Jframe {
    public TestComboboxDemo02(){
        Container contentPane = this.getContentPane();

        // 生成列表内容
        // String[] contents = {"1","2","3"};
        Vector contents = new Vector();

        // 列表中需要放入内容
        JList jList = new JList(contents);

        contents.add("one");
        contents.add("two");
        contents.add("three");

        contentPane.add(jList);

        this.setVisible(true);
        this.setBounds(100,200,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo02();
    }
}

结果：

应用场景

选择地区或一些单个选项列表，展示信息，一般动态扩容 4.7 文本框

package top.cxy96.java_GUI.lesson7;

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

public class TestTextDemo01 extends Jframe {
    public TestTextDemo01() {
        Container contentPane = this.getContentPane();

        JTextField jTextField1 = new JTextField("hello");
        JTextField jTextField2 = new JTextField("world",20); // 默认字符个数

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

        this.setVisible(true);
        this.setBounds(100,200,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo01();
    }
}

结果：

密码框

package top.cxy96.java_GUI.lesson7;

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

public class TestTextDemo02 extends Jframe {
    public TestTextDemo02() {
        Container contentPane = this.getContentPane();

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

        contentPane.add(jPasswordField);

        this.setVisible(true);
        this.setBounds(100,200,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo02();
    }
}

结果：
[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-7ZiT27VT-1646581121410)(https://cdn.jsdelivr.net/gh/cxy20219/image/images/Demo_GUI_Demo21.png)]

文本域

package top.cxy96.java_GUI.lesson6;

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

public class JScrollDemoDemo extends Jframe {
    public JScrollDemoDemo() {
        Container contentPane = this.getContentPane();

        // 文本域
        Jtextarea jtextarea = new Jtextarea(20,50);
        jtextarea.setText("学Java认识Java");
        contentPane.add(jtextarea);

        // 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 JScrollDemoDemo();
    }
}

结果：

5. 贪吃蛇

代码：

package top.cxy96.java_GUI.lesson8.snake;

import javax.swing.*;

// 游戏的主启动类
public class StartGame {
    public static void main(String[] args) {
        Jframe jframe = new Jframe();


        jframe.setBounds(450,250,900,720);
        jframe.setResizable(false); //　默认大小不可拉伸
        jframe.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        // 正常游戏界面
        jframe.add(new GamePanel());

        jframe.setVisible(true);
    }
}

package top.cxy96.java_GUI.lesson8.snake;
import javax.swing.*;
import java.net.URL;

// 数据中心
public class Data {
    public static URL headerURL = Data.class.getResource("statics/header.png");
    public static URL upURL = Data.class.getResource("statics/up.png");
    public static URL downURL = Data.class.getResource("statics/down.png");
    public static URL leftURL = Data.class.getResource("statics/left.png");
    public static URL rightURL = Data.class.getResource("statics/right.png");

    public static ImageIcon header = new ImageIcon(headerURL);
    public static ImageIcon up = new ImageIcon(upURL);
    public static ImageIcon down = new ImageIcon(downURL);
    public static ImageIcon left = new ImageIcon(leftURL);
    public static ImageIcon right = new ImageIcon(rightURL);

    public static URL bodyURL = Data.class.getResource("statics/body.png");
    public static ImageIcon body = new ImageIcon(bodyURL);

    public static URL foodURL = Data.class.getResource("statics/food.png");
    public static ImageIcon food = new ImageIcon(foodURL);

}

package top.cxy96.java_GUI.lesson8.snake;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Random;

//　游戏的面版
public class GamePanel extends JPanel implements KeyListener, ActionListener {
    // 定义蛇的数据结构
    int length;  // 蛇的长度
    int[] snakeX = new int[600]; // 蛇的x坐标25*25
    int[] snakeY = new int[500]; // 蛇的x坐标25*25
    String direction;  // 头方向
    boolean isStart = false; // 当前游戏状态
    boolean isFail = false; // 游戏失败状态

    // 食物的坐标
    int foodX;
    int foodY;
    Random random = new Random();

    // 分数
    int score;

    // 定时器
    Timer timer = new Timer(100,this);  // 100ms执行一次

    // 构造器
    public GamePanel() {
        init();
        // 获得焦点和监听事件
        this.setFocusable(true); // 获取焦点
        this.addKeyListener(this); // 获取键盘
        timer.start();
    }

    // 初始化方法
    public void init(){
        length = 3;
        snakeX[0] = 100;snakeY[0] = 100; // 头的坐标
        snakeX[1] = 75;snakeY[1] = 100; // 第一个身体的坐标
        snakeX[2] = 50;snakeY[2] = 100; // 第二个身体的坐标
        direction = "R"; // 初始化方向向右
        // 把食物随机分布在界面上
        foodX = 25 +25*random.nextInt(34);
        foodY = 75 +25*random.nextInt(24);
        // 初始化分数
        score = 0;
    }

    // 绘制面板，游戏中所有东西都用画笔画
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        // 绘制静态面板
        this.setBackground(Color.WHITE);
        Data.header.paintIcon(this,g,25,11); // 头部广告
        g.fillRect(25,75,850,600); // 默认游戏界面

        // 画积分
        g.setColor(Color.white);
        g.setFont(new Font("微软雅黑",Font.BOLD,18));
        g.drawString("长度"+length,750,35);
        g.drawString("分数"+score,750,55);

        // 画食物
        Data.food.paintIcon(this,g,foodX,foodY);

        // 画小蛇
        if(direction.equals("R")){
            Data.right.paintIcon(this,g,snakeX[0],snakeY[0]); // 头初始化向右,通过方向来判断
        }else if(direction.equals("L")){
            Data.left.paintIcon(this,g,snakeX[0],snakeY[0]); // 头初始化向右,通过方向来判断
        }else if(direction.equals("U")){
            Data.up.paintIcon(this,g,snakeX[0],snakeY[0]); // 头初始化向右,通过方向来判断
        }else if(direction.equals("D")){
            Data.down.paintIcon(this,g,snakeX[0],snakeY[0]); // 头初始化向右,通过方向来判断
        }

        for(int i=1;i0;i--){
                snakeX[i] = snakeX[i-1]; // 向前移动一截
                snakeY[i] = snakeY[i-1];
            }
            // 走向
            if(direction.equals("R")){
                snakeX[0] = snakeX[0]+25;
                // 边界判断
                if(snakeX[0]>850){
                    snakeX[0] =25;
                }
            }else if(direction.equals("L")){
                snakeX[0] = snakeX[0]-25;
                if(snakeX[0]<25){
                    snakeX[0] = 850;
                }
            }
            else if(direction.equals("U")){
                snakeY[0] = snakeY[0] - 25;
                if (snakeY[0]<75){
                    snakeY[0] = 650;
                }
            }
            else if(direction.equals("D")){
                snakeY[0] = snakeY[0] +25;
                if(snakeY[0]>650){
                    snakeY[0] = 75;
                }
            }
            // 失败判定,撞到自己
            for (int i = 1; i < length; i++) {
                if(snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]){
                    isFail = true;
                }
            }
            repaint(); // 重画画面
        }
        timer.start(); // 定时器开始
    }
}

结果演示：

Java-GUI篇

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