java 如何开发plugin

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mob64ca140e4022 2025-01-07 07:16:06
文章标签 java 如何开发plugin java ide 输入框文本框 文章分类 Java 后端开发
Java GUI编程学习
GUI编程
告诉大家怎么学？
• 这是什么？
• 他怎么玩？
• 该如何平时运用它？
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
1. 因为界面不美观
2. 需要jre环境！
为什么要学习？
1. 可以写出自己想要的小工具
2. 工作时候也可能需要维护到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. 包含很多类和接口！GUI!
2. 元素：窗口，按钮，文本框
3. java.awt
2.3、布局管理器
流式布局

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");

        //设置为流布局

            //默认是居中的
        frame.setLayout(new FlowLayout());
            //设置靠左
        frame.setLayout(new FlowLayout(FlowLayout.LEFT));

        frame.setSize(200,200);

        //把按钮添加进去
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);

        //设置可见
        frame.setVisible(true);
    }
}• 东南西北中布局
•  public class TestBorderLayout {
 public static void main(String[] args) {
 Frame frame = new Frame(“TestorderLayout”);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");

        //把按钮添加进去
        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);

        //设置可见和窗体大小
        frame.setVisible(true);
        frame.setSize(400,400);
    }
}• 表格布局 Grid
•  public class TestGridlLayout {
 public static void main(String[] args) {
 Frame frame = new Frame(“TestorderLayout”);Button button1 = new Button("button1");
        Button button2 = new Button("button2");
        Button button3 = new Button("button3");
        Button button4 = new Button("button4");
        Button button5 = new Button("button5");
        Button button6 = new Button("button6");

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

        frame.add(button1);
        frame.add(button2);
        frame.add(button3);
        frame.add(button4);
        frame.add(button5);
        frame.add(button6);

        frame.pack();//java函数  自动填充
        frame.setVisible(true);
    }

}布局练习
• 
分析过程：
代码实现：
public class EXDemo {
    public static void main(String[] args) {

        //总frame
        Frame frame = new Frame();
        frame.setVisible(true);
        frame.setSize(500,400);
        frame.setLocation(300,400);
        frame.setBackground(Color.black);
        frame.setLayout(new GridLayout(2,1));


        //四个面板
        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));

        //上面部分
        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);

        //下面部分
        p3.add(new Button("East-2"), BorderLayout.EAST);
        p3.add(new Button("West-2"), BorderLayout.WEST);
        //中间4个
        for (int i = 0; i < 4; i++) {
            p4.add(new Button("for-" + i));
        }
        p3.add(p4, BorderLayout.CENTER);

        //最后添加到frame里面
        frame.add(p1);
        frame.add(p3);
    }
}2.4、事件监听
事件监听：当某个事发生时，干什么？
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("button");

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

        frame.add(button,BorderLayout.CENTER);
//        frame.pack();//自适应
        frame.setSize(500,500);//窗体大小
        frame.setLocation(400,300);//窗体在桌面的定位

        windowClose(frame);
        frame.setVisible(true);
    }

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

}

//事件监听
class MyActionListener implements ActionListener{

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

    }
}多个事件共享一个事件
public class TestActionEvent02 {
    public static void main(String[] args) {
        //两个按钮同时实现同一个监听
        //开始 停止
        Frame frame = new Frame("开始-停止");
        Button button1 = new Button("start");
        Button button2 = new Button("stop");

        //可以显示的定义触发会返回的命令，如果不定义会默认button的值
        //可以多个按钮只写一个监听事类
        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.setSize(500,500);
        frame.setLocation(300,400);
        frame.setVisible(true);
    }
}

//监听事件
class MyMonitor implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        //e.getActionCommand()获取按钮信息
        System.out.println("按钮被点击：msg"+e.getActionCommand());
        if (e.getActionCommand().equals("start")) {
            System.out.println("我是start");

        }

    }
}2.5、输入框TextField 监听
public class TestTest01 {
    public static void main(String[] args) {
        //启动！
        MyFrame myFrame = 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('*');

        setSize(500,500);
        setVisible(true);

    }
}
class MyActionListener2 implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        TextField field=(TextField) e.getSource();//获得一些资源,返回一个对象
        System.out.println(field.getText());//获得输入框中的文本
        field.setText("");//按下enter后清空输入框
    }
}2.6、简易计算器，组合+内部类回顾复习！
oop原则：组合大于继承
//组合
class A{
    public B b;
}

//继承
class A extends B{
    
}



//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);//字符数
        TextField num3 = new TextField(20);//字符数
        //1 个提交按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener(num1,num2,num3));
        //1 个标签
        Label label = new Label("+");

        //使用流式布局
        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3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) {
        //1、获得加数和被加数
        int n1 = Integer.parseInt(num1.getText());
        int n2 = Integer.parseInt(num2.getText());

        //2、将这个值+法运算后放到第三个框
        num3.setText(""+(n1+n2));
        //3、清除前两个输入框
        num1.setText("");
        num2.setText("");
    }
}完全改造成面向对象写法
//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() {
        //3 个文本框
         num1 = new TextField(10);//字符数
         num2 = new TextField(10);//字符数
         num3 = new TextField(20);//字符数
        //1 个提交按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener(this));
        //1 个标签
        Label label = new Label("+");

        //使用流式布局
        setLayout(new FlowLayout());
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setVisible(true);
    }

}

//监听器类
class MyCalculatorListener implements ActionListener {
    //获取计算器这个对象,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) {
        //1、获得加数和被加数
        int n1 = Integer.parseInt(calculator.num1.getText());
        int n2 = Integer.parseInt(calculator.num2.getText());


        //2、将这个值+法运算后放到第三个框
        calculator.num3.setText(""+(n1+n2));

        //3、清除前两个输入框
        calculator.num1.setText("");
        calculator.num2.setText("");

    }
}内部类：
• 更好的包装
 //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() {
        //3 个文本框
         num1 = new TextField(10);//字符数
         num2 = new TextField(10);//字符数
         num3 = new TextField(20);//字符数
        //1 个提交按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener());
        //1 个标签
        Label label = new Label("+");

        //使用流式布局
        setLayout(new FlowLayout());
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setVisible(true);
    }

    //监听器类
    //内部类最大的好处就是可以畅通无阻的访问外部的属性和方法！
    class MyCalculatorListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            //1、获得加数和被加数
            int n1 = Integer.parseInt(num1.getText());
            int n2 = Integer.parseInt(num2.getText());


            //2、将这个值+法运算后放到第三个框
            num3.setText(""+(n1+n2));

            //3、清除前两个输入框
            num1.setText("");
            num2.setText("");

        }
    }

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

    }
}

class MyPaint extends Frame {
    public void loadFrame(){
        setBounds(200,200,600,400);
        setVisible(true);
    }
    //画笔
    @Override
    public void paint(Graphics g) {
        //super.paint(g);
        // 画笔，需要有颜色，画笔可以画画
        g.setColor(Color.BLUE);
//        g.drawOval(100,100,100,100);//空心的圆
        g.fillOval(100,100,100,100);//实心的圆

        g.setColor(Color.GREEN);
        g.fillRect(150,200,200,200);
    }
}2.8、鼠标监听
目的想要实现鼠标画画
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，需要监听鼠标当前位置，需要集合来存储这个点
    ArrayList points;

    public MyFrame(String title) {
        super(title);
        setBounds(200,200,500,400);
        //存鼠标点击的点
        points = new ArrayList<>();
        //鼠标监听器针对这个窗口
        this.addMouseListener(new MyMouseListener());

        setVisible(true);
    }

    @Override
    public void paint(Graphics g) {
        //画画需要监听鼠标的事件
        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 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 frame =(MyFrame) e.getSource();
            //这个时候我们点击的时候，就会产生一个点！ 画
            //这个点就是鼠标的点
            frame.addPoint(new Point(e.getX(),e.getY()));

            //每次点击鼠标都需要重画一次
            frame.repaint();//刷新

        }
    }
}2.9、窗口监听
public class TestWindow {
    public static void main(String[] args) {
        new WindowFrame();
    }
}

class WindowFrame extends Frame {
    public WindowFrame() {
        setBackground(Color.BLACK);
        setBounds(100, 100, 300, 300);
        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("WindowClose");
                    System.exit(0);
                }
                //激活窗口
                @Override
                public void windowActivated(WindowEvent e) {
                    WindowFrame source =(WindowFrame) e.getSource();
                    source.setTitle("窗口被激活了");
                    System.out.println("WindowActived");
                }

            }
        );
    }
}2.10、键盘监听
//key就是键的意思
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 getKeyCode()来获取当前键盘码
                int keycode = e.getKeyCode();//不需要记录这个值，直接使用静态属性
                System.out.println(keycode);
                if(keycode==KeyEvent.VK_UP){
                    System.out.println("你按下了上键");
                }
                //根据按下的不同产生不同的结果
            }
        });
    }3、Swing
3.1、窗口、面板
public class JFrameDemo {
    //init(); 初始化
    public void init(){
        //顶级窗口
        JFrame jFrame = new JFrame("这是一个JFrame窗口");
        jFrame.setVisible(true);
        jFrame.setBounds(100, 100, 400, 500);
        jFrame.setBackground(Color.red);
        //设置文字 JLabel
        JLabel lable = new JLabel("欢迎来到Java");
        jFrame.add(lable);

        //容器实例化
        
        //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();
    }
}标签居中
public class JFrameDemo02 {
    public static void main(String[] args) {
        new MyJFrame2().init();
    }
}
class MyJFrame2 extends JFrame{
    public void init(){
        this.setVisible(true);
        this.setBounds(100,100,300,400);

        //设置文字 JLabel
        JLabel lable = new JLabel("欢迎来到Java");
        add(lable);

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

        //获得一个容器
        Container container = this.getContentPane();
        container.setBackground(Color.BLUE);
    }
}3.2、弹窗
JDialog 用来被弹出，默认就有关闭事件
//主窗口
public class DialogDemo extends JFrame {
    public DialogDemo() {
        this.setVisible(true);
        this.setSize(400, 500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); //设置默认的关闭事件

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

        //按钮
        JButton jButton = new JButton("点击弹出一个对话框");//创建对象
        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) {
                //弹窗
                new MyDialog();
            }
        });
        container.add(jButton);

    }

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

    }
}
//弹窗的窗口
class MyDialog extends JDialog{
    public MyDialog() {
        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("带你飞"));
    }
}3.3、 标签
label
new JLabel("xxx")图标 icon
图片 image
public class ImageIconDemo extends JFrame {

    public ImageIconDemo(){
        //获取图片的地址
        JLabel label = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("22.jpg");

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

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

        container.setLayout(new GridLayout(2, 1, 10, 10));//后面两个参数是“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();
    }
}JScrollPanel
带滚动条的面板
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, 400);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JScrollDemo();
    }
}3.5、按钮
package com.liang.lesson05;

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

/**
 * Created by Dream on 2022/4/20.
 */
public class JButtonDemo extends JFrame {
    public JButtonDemo() {
        Container container = this.getContentPane();
        //将图片变为一个图标
        URL resource = JButtonDemo.class.getResource("22.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.setBounds(800,300,800,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo();
    }
}单选按钮
package com.liang.lesson05;

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

/**
 * Created by Dream on 2022/4/20.
 */
public class JButtonDemo02 extends JFrame{
    public JButtonDemo02() {
        Container container = this.getContentPane();
        //将图片变为一个图标
        URL resource = JButtonDemo.class.getResource("22.jpg");
        Icon icon = new ImageIcon(resource);

        //单选框
        JRadioButton radioButton01 = new JRadioButton("JRadioButton01");
        JRadioButton radioButton02 = new JRadioButton("JRadioButton02");
        JRadioButton radioButton03 = new JRadioButton("JRadioButton03");
        
        //由于单选框只能选择一个，分组,一个组中只可以选择一个
        ButtonGroup group = new ButtonGroup();
        group.add(radioButton01);
        group.add(radioButton02);
        group.add(radioButton03);

        container.add(radioButton01, BorderLayout.CENTER);
        container.add(radioButton02, BorderLayout.NORTH);
        container.add(radioButton03, BorderLayout.SOUTH);


        this.setVisible(true);
        this.setBounds(800,300,800,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo02();
    }
}复选按钮
package com.liang.lesson05;

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

/**
 * Created by Dream on 2022/4/20.
 */
public class JButtonDemo03 extends JFrame{
    public JButtonDemo03() {
        Container container = this.getContentPane();
        //将图片变为一个图标
        URL resource = JButtonDemo.class.getResource("22.jpg");
        Icon icon = new ImageIcon(resource);

        //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.setBounds(800,300,800,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo03();
    }
}3.6、列表
• 下拉框
package com.liang.lesson06;
import javax.swing.;
 import java.awt.;
/**• Created by Dream on 2022/4/20.
 */
 public class TestComboboxDemo01 extends JFrame {
 public TestComboboxDemo01() {Container container = this.getContentPane();

 JComboBox status = new JComboBox<>();
 status.addItem(null);
 status.addItem("正在热映");
 status.addItem("已下架");
 status.addItem("即将上映");

 container.add(status);


 this.setVisible(true);
 this.setBounds(300,300,400,500);
 this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}
public static void main(String[] args) {
 new TestComboboxDemo01();
 }
 }• 列表框
package com.liang.lesson06;
import javax.swing.;
 import java.awt.;
 import java.util.Vector;
/**• Created by Dream on 2022/4/20.
 */
 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<>();
      //列表中需要放内容
      JList jList = new JList<>(contents);

      contents.add("张三");
      contents.add("李四");
      contents.add("王五");

      container.add(jList);


      this.setVisible(true);
      this.setBounds(300,300,400,500);
      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.liang.lesson06;
import javax.swing.;
 import java.awt.;
 import java.util.Vector;
/**• Created by Dream on 2022/4/20.
 */
 public class TestTextDemo01 extends JFrame {
 public TestTextDemo01() {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.setBounds(300,300,400,500);
 this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}
public static void main(String[] args) {
 new TestTextDemo01();
 }
 }• 密码框
package com.liang.lesson06;
import javax.swing.;
 import java.awt.;
/**• Created by Dream on 2022/4/20.
 */
 public class TestTextDemo02 extends JFrame {
 public TestTextDemo02() {Container container = this.getContentPane();

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

 container.add(passwordField);


 this.setVisible(true);
 this.setBounds(300,300,400,500);
 this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}
public static void main(String[] args) {
 new TestTextDemo02();
 }
 }• 文本域
package com.liang.lesson05;
import javax.swing.;
 import java.awt.;
/**• Created by Dream on 2022/4/20.
 */
 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, 400);
 this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}
public static void main(String[] args) {
 new JScrollDemo();
 }
 }贪吃蛇
帧，如果时间线足够小，就是动画，一秒30帧 60帧。连起来是动画，拆开就是静态图片！
键盘监听
定时器Timer
• 游戏主启动类
package com.liang.snake;
import javax.swing.*;
/**• Created by Dream on 2022/4/21.
 */
 //游戏主启动类
 public class StartGame {
 public static void main(String[] args) {
 JFrame frame = new JFrame();frame.setBounds(500, 200, 900, 720);
 frame.setResizable(false);//窗口大小不可变
 frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

 //正常游戏界面都应该在面上！
 frame.add(new GamePanel());

 frame.setVisible(true);}
 }• 游戏面板
package com.liang.snake;
import javax.sql.DataSource;
 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.Date;
 import java.util.Random;
/**• Created by Dream on 2022/4/21.
 */
 //游戏的面板
 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2525
 int[] snakeY = new int[600];//蛇的Y坐标2525
 String fx;
//食物的坐标
 int foodx;
 int foody;
 Random random = new Random();
//积分
 int score;
//游戏当前的状态：开始，停止
 boolean isStart = false;//默认是不开始
boolean isFail = false;//游戏状态失败
//定时器 以ms为单位 1000ms=1s
 Timer timer = new Timer(100,this);//100毫执行一次！
//构造器
 public GamePanel() {
 init();
 //获得焦点和键盘事件
 this.setFocusable(true);//获得焦点事件
 this.addKeyListener(this);//获得键盘监听事件
 timer.start();//游戏一开始定时器启动
}
//初始化方法
 public void init(){
 length=3;
 snakeX[0] = 100; snakeY[0] = 100;//脑袋的坐标
 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
 fx = “R”;//初始反向向右//把食物随机分布在界面上
 foodx = 25 + 25 * random.nextInt(34);
 foody = 75 + 25 * random.nextInt(24);

 score = 0;}
//绘制面板，我们游戏中的所有东西，都是用这个画笔来画
 @Override
 protected void paintComponent(Graphics g) {
 super.paintComponent(g);//清屏
 //绘制静态面板
 this.setBackground(Color.WHITE);
 Data.header.paintIcon(this, g, 25, 11);//头部广告栏画上去
 g.fillRect(25, 75, 850, 600);//默认的游戏界面//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,750,50);

 //画食物
 Data.food.paintIcon(this, g, foodx, foody);

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


 for (int i = 1; i < length; i++) {
     Data.body.paintIcon(this, g, snakeX[i], snakeY[i]);//第一个身体坐标
 }



 //游戏状态
 if (isStart==false){
     g.setColor(Color.white);
     g.setFont(new Font("微软雅黑",Font.BOLD,40));//设置字体
     g.drawString("按下空格开始游戏",300,300);
 }

 if (isFail) {
     g.setColor(Color.RED);
     g.setFont(new Font("微软雅黑",Font.BOLD,40));//设置字体
     g.drawString("游戏失败，按下空格重新开始",200,300);
 }}
//键盘监听事件
 @Override
 public void keyPressed(KeyEvent e) {
 int keyCode = e.getKeyCode();//获得键盘按钮是哪一个if (keyCode == KeyEvent.VK_SPACE) {//如果按下的是空格键
     if (isFail) {
         //游戏重新开始
         isFail = false;
         init();
     }else{
         isStart = !isStart;//取反
     }
     repaint();
 }
 //小蛇移动
 if (keyCode == KeyEvent.VK_UP) {
     fx = "U";
 }else if (keyCode == KeyEvent.VK_DOWN) {
     fx = "D";
 }else if(keyCode == KeyEvent.VK_LEFT) {
     fx = "L";
 }else if(keyCode == KeyEvent.VK_RIGHT) {
     fx = "R";
 }}
//事件监听—需要通过固定事件来判断，1s=10次
 @Override
 public void actionPerformed(ActionEvent e) {
 if (isStart && isFail == false) {//如果游戏是开始状态，则让小蛇动起来//吃食物
     if (snakeX[0] == foodx && snakeY[0] == foody) {
         length++;//蛇的长度加1
         //分数+1
         score = score + 1;
         //再次随机生成食物
         foodx = 25 + 25 * random.nextInt(34);
         foody = 75 + 25 * random.nextInt(24);
     }


     //移动
     for (int i = length - 1; i > 0; i--) {//后一节移到前一节的位置 snakeX[1]=snakeX[0];
         snakeX[i] = snakeX[i - 1];
         snakeY[i] = snakeY[i - 1];
     }
     //走向
     if (fx.equals("R")) {
         snakeX[0] = snakeX[0] + 25;//移动
         if (snakeX[0] > 850) {
             snakeX[0] = 25;
         }//边界判断
     } else if (fx.equals("L")) {
         snakeX[0] = snakeX[0] - 25;
         if (snakeX[0] < 25) {
             snakeX[0] = 850;
         }//边界判断
     } else if (fx.equals("U")) {
         snakeY[0] = snakeY[0] - 25;
         if (snakeY[0] < 75) {
             snakeY[0] = 650;
         }//边界判断
     } else if (fx.equals("D")) {
         snakeY[0] = snakeY[0] + 25;
         if (snakeY[0] > 650) {
             snakeY[0] = 75;
         }//边界判断
     }

     //失败判定，撞到自己就失败
     for (int i = 1; i < length; i++) {
         if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]) {
             isFail = true;
         }
     }


     repaint();//重画页面
 }
 timer.start();//定时器开启！}
@Override
 public void keyReleased(KeyEvent e) {
 }
 @Override
 public void keyTyped(KeyEvent e) {
 }}
• 数据中心
package com.liang.snake;
import javax.swing.*;
 import java.net.URL;
/**• Created by Dream on 2022/4/21.
 */
 //数据中心
 public class Data {
//相对路径 22.jpg
 //绝对路径 / 相当于当前的项目
 public static URL headerURL = Data.class.getResource(“statics/header.png”);
 public static ImageIcon header = new ImageIcon(headerURL);
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 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);
 }总结
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