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

因为界面不美观
需要jre环境！

为什么要学习？

可以写出自己想要的小工具
工作时候也可能需要维护到Swing界面，概率极小！
了解MVC架构，了解监听！

2、AWT

2.1、AWT介绍

包含很多类和接口！GUI!
元素：窗口，按钮，文本框
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frameFrame 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ActionListenerMyActionListener 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() {@Overridepublic void windowClosing(WindowEvent e) {System.exit(0);}});}}//事件监听
class MyActionListener implements ActionListener{@Overridepublic 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{@Overridepublic 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{@Overridepublic 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;}@Overridepublic 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;}@Overridepublic 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 {@Overridepublic 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@Overridepublic 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);}@Overridepublic 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@Overridepublic 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@Overridepublic void windowClosing(WindowEvent e) {System.out.println("WindowClose");System.exit(0);}//激活窗口@Overridepublic 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@Overridepublic 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 JLabelJLabel 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 JLabelJLabel 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@Overridepublic 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");//addcontainer.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+1score = 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);
  }

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