第一步是创建项目 项目名自拟

第二部创建个包名 来规范class

然后是创建类 GameFrame   运行类

package com.sxt;

package com.sxt;
 
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
 
import javax.swing.JButton;
import javax.swing.JFrame;
 
public class GameFrame extends JFrame {
    // 窗口尺寸
    private int windowWidth = 1400;
    private int windowHeight = 700;
    // 双缓冲图片
    private Image offScreenImage = null;
    // 攻击图片
    private Image attack = Toolkit.getDefaultToolkit().getImage("img/attack.jpg");
    // 游戏背景
    Background background = new Background(this);
    // 游戏玩家
    Champion player = new ChampionHouyi(this);
    // 双方小兵
    MinionBlue mb = new MinionBlue(this);
    MinionRed mr = new MinionRed(this);
    // 防御塔
    Turret turret = new Turret(this);
    // 攻击按钮
    JButton attackButton;
    // 游戏元素列表
    ArrayList<GameObject> objList = new ArrayList<GameObject>();
    ArrayList<GameObject> redList = new ArrayList<GameObject>();// 红色方
    ArrayList<GameObject> blueList = new ArrayList<GameObject>();// 蓝色方
    ArrayList<GameObject> removeList = new ArrayList<GameObject>();// 存放将要删除的元素
 
    public void launch() {
        // 设置尺寸
        setSize(windowWidth, windowHeight);
        // 窗口居中
        setLocationRelativeTo(null);
        // 关闭事件
        setDefaultCloseOperation(3);
        // 用户不能调整窗口大小
        setResizable(false);
        // 标题
        setTitle("尚学堂王者荣耀");
        // 窗口可见
        setVisible(true);
        // 添加键盘监视器
        this.addKeyListener(new GameFrame.KeyMonitor());
        // 添加游戏元素
        objList.add(background);
        objList.add(player);
        objList.addAll(turret.turretList);
        blueList.add(turret.turretList.get(0));
        redList.add(turret.turretList.get(4));
 
        /**
         * 攻击按钮
         */
        attackButton = new JButton();
        attackButton.setSize(130, 132);
        attackButton.setLocation(1150, 430);
        attackButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // 按钮事件
                player.attack(redList);
            }
        });
        this.add(attackButton);
        player.addButton();
 
        while (true) {
            mb.createMinion(this, blueList);
            mr.createMinion(this, redList);
            turret.addTurret(this);
            repaint();
            try {
                Thread.sleep(25);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
 
    public void paint(Graphics g) {
        // System.out.println(player.getX()+" "+player.getY());
        if (offScreenImage == null) {
            offScreenImage = this.createImage(5984, 4452);
        }
        Graphics gImage = offScreenImage.getGraphics();
        for (int i = 0; i < objList.size(); i++) {
            objList.get(i).paintSelf(gImage);
        }
        // 绘制攻击图片
        gImage.drawImage(attack, player.getX() + 500, player.getY() + 100, null);
        objList.removeAll(removeList);
 
        g.drawImage(offScreenImage, -player.getX() + 700, -player.getY() + 350, null);
        /**
         * 添加按钮后不能调用键盘事件 因为程序的焦点变成了按钮 this.requestFocus() 把焦点重新改变到游戏界面上
         */
        this.requestFocus();
    }
 
    // main方法
    public static void main(String[] args) {
        GameFrame gameFrame = new GameFrame();
        gameFrame.launch();
    }
 
    // 键盘事件
    private class KeyMonitor extends KeyAdapter {
        @Override
        public void keyPressed(KeyEvent e) {
            int key = e.getKeyCode();
            player.keyPressed(e);
        }
 
        @Override
        public void keyReleased(KeyEvent e) {
            int key = e.getKeyCode();
            player.keyReleased(e);
        }
    }
}