java小游戏源代码（Java 小游戏源代码合集）

一、贪吃蛇

方向键控制，吃到食物变长，撞墙或撞自己结束。空格暂停，R 键重开。

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.LinkedList;
import java.util.Random;

public class Snake extends JPanel implements ActionListener {
    static final int SIZE = 25, COLS = 30, ROWS = 22;
    LinkedList<Point> snake = new LinkedList<>();
    Point food;
    char dir = 'R';
    boolean run = true, pause = false;
    int score;
    Random rnd = new Random();

    Snake() {
        setPreferredSize(new Dimension(SIZE*COLS, SIZE*ROWS));
        setBackground(new Color(30,30,30));
        setFocusable(true);
        int cx=COLS/2, cy=ROWS/2;
        for(int i=2;i>=0;i--) snake.add(new Point(cx-i,cy));
        spawn();
        addKeyListener(new KeyAdapter(){
            public void keyPressed(KeyEvent e){
                int k=e.getKeyCode();
                if(k==KeyEvent.VK_UP||k==KeyEvent.VK_W) {if(dir!='D')dir='U';}
                if(k==KeyEvent.VK_DOWN||k==KeyEvent.VK_S) {if(dir!='U')dir='D';}
                if(k==KeyEvent.VK_LEFT||k==KeyEvent.VK_A) {if(dir!='R')dir='L';}
                if(k==KeyEvent.VK_RIGHT||k==KeyEvent.VK_D) {if(dir!='L')dir='R';}
                if(k==KeyEvent.VK_SPACE) pause=!pause;
                if(k==KeyEvent.VK_R) restart();
            }
        });
        new Timer(100,this).start();
    }

    void spawn(){ do{food=new Point(rnd.nextInt(COLS),rnd.nextInt(ROWS));}while(snake.contains(food)); }
    void restart(){ snake.clear(); int cx=COLS/2,cy=ROWS/2;
        for(int i=2;i>=0;i--) snake.add(new Point(cx-i,cy));
        dir='R';run=true;pause=false;score=0;spawn(); }
    public void actionPerformed(ActionEvent e){
        if(!run||pause)return;
        Point h=snake.getFirst(); int nx=h.x,ny=h.y;
        switch(dir){case'U':ny--;break;case'D':ny++;break;case'L':nx--;break;case'R':nx++;}
        if(nx<0||nx>=COLS||ny<0||ny>=ROWS){run=false;((Timer)e.getSource()).stop();repaint();return;}
        Point nh=new Point(nx,ny);
        if(snake.contains(nh)&&!nh.equals(snake.getLast())){run=false;((Timer)e.getSource()).stop();repaint();return;}
        snake.addFirst(nh);
        if(nh.equals(food)){score+=10;spawn();}else snake.removeLast();
        repaint();
    }
    protected void paintComponent(Graphics g){
        super.paintComponent(g);
        g.setColor(new Color(45,45,45));
        for(int x=0;x<=COLS;x++)g.drawLine(x*SIZE,0,x*SIZE,SIZE*ROWS);
        for(int y=0;y<=ROWS;y++)g.drawLine(0,y*SIZE,SIZE*COLS,y*SIZE);
        g.setColor(new Color(255,80,80));
        g.fillOval(food.x*SIZE+2,food.y*SIZE+2,SIZE-4,SIZE-4);
        for(int i=0;i<snake.size();i++){ Point p=snake.get(i);
            if(i==0)g.setColor(new Color(100,200,100));
            else{int gv=180-Math.min(i*3,100);g.setColor(new Color(60,gv,60));}
            g.fillRoundRect(p.x*SIZE+1,p.y*SIZE+1,SIZE-2,SIZE-2,6,6);
        }
        g.setColor(new Color(255,255,255,180));g.setFont(new Font("",0,14));
        g.drawString("得分:"+score,12,22);
        if(pause)g.drawString("[暂停]",SIZE*COLS/2-30,22);
        if(!run){g.setColor(new Color(0,0,0,160));g.fillRect(0,0,SIZE*COLS,SIZE*ROWS);
            g.setColor(Color.WHITE);g.setFont(new Font("",1,28));g.drawString("游戏结束",SIZE*COLS/2-56,SIZE*ROWS/2-10);
            g.setFont(new Font("",0,16));g.drawString("按R重新开始",SIZE*COLS/2-48,SIZE*ROWS/2+20);}
    }
    public static void main(String[]a){SwingUtilities.invokeLater(()->{
        JFrame f=new JFrame("贪吃蛇");f.setDefaultCloseOperation(3);f.setResizable(false);
        Snake s=new Snake();f.add(s);f.pack();f.setLocationRelativeTo(null);f.setVisible(true);
    });}
}