snake.java

是一个新的贪吃蛇游戏

import java.awt.*;
import java.applet.*;
import java.applet.Applet;

public class snake extends Applet implements Runnable {
  Image dot[]=new Image[400];
    Image back;
    Image offI;
    Graphics offG;
    int x[]=new int[400];
    int y[]=new int[400];
    int rtemp=1;
    int game=1;
    int count=0;
    int score=0;
    int add=1;
    int level,z,n;
    Button level1=new Button("初级");
    Button level2=new Button("中级");
    Button level3=new Button("高级");
    Button level4=new Button("专家级");
    String stemp;
    String s,t;
    boolean go[]=new boolean[400];
    boolean left=false;
    boolean right=false;
    boolean up=false;
    boolean down=false;
    boolean started=false;
    Thread setTime;

    public void init(){
        add(level1);
        add(level2);
        add(level3);
        add(level4);
        setBackground(Color.black);
        back=getImage(getCodeBase(),"screan.gif");
        for(z=0;z<400;z++){
            dot[z]=getImage(getCodeBase(),"dot.gif");
        }
    }
    public void update(Graphics g){
        Dimension d=this.size();
        if(offI==null){
            offI=createImage(d.width,d.height);
            offG=offI.getGraphics();
        }
        offG.clearRect(0, 0, d.width, d.height);
        paint(offG);
        g.drawImage(offI,0,0, null);
    }
    public void paint(Graphics g){
        g.drawImage(back, 0, 0, this);
        g.setColor(Color.white);
        if(started){
            g.setFont(new Font("TimesRoman",1,12));
            t="分数"+score+"";
            g.drawString(t, 75, 220);
        }
        if(game==1){
            g.setFont(new Font("TimesRoman",1,13));
            s="游戏模式选择";
            g.drawString(t, 65, 30);
            level1.move(75, 50);
            level2.move(75, 90);
            level3.move(75, 130);
            level4.move(70, 170);
        }
        if((game==2)||(game==3)){
            if(!started){
                g.setFont(new Font("TimesRoman",1,13));
                t="用方向键移动!";
                g.drawString(t, 5, 215);
            }
            for(z=0;z<=n;z++){
                g.drawImage(dot[z], x[z], y[z], this);
            }
            if(game==3){
                g.setFont(new Font("TimesRoman",1,13));
                s="游戏结束";
                g.drawString(s, 65, 60);
            }
        }
        public void run(){
            for(z=4;z<400;z++){
                go[z]=true;
                x[z]=91;
                y[z]=91;
            }
            n=3;
            game=2;
            score=0;
            level1.move(70, -100);
            level2.move(70, -100);
            level3.move(70, -100);
            level4.move(70, -100);
            left=false;
            right=false;
            up=false;
            down=false;
            locateRandom(4);
            while(true){
                if(game==2){
                    if((x[0]==x[n])&&(y[0]==y[n])){
                        go[n]=true;
                        locateRandom((n+1));
                        score+=add;
                    }
                    for(z=399;z>0;z--){
                        if(go[z]){
                            x[z]=x[(z-1)];
                            y[z]=y[(z-1)];
                            if((z>4)&&(x[0]==x[z])&&(y[0]==y[z])){
                                game=3;
                            }
                        }
                    }
                    if(left){
                        x[0]-=10;
                    }
                    if(right){
                        x[0]+=10;
                    }
                    if(up){
                        x[0]-=10;
                    }
                    if(down){
                        x[0]+=10;
                    }
                }
                if(y[0]>191){
                    y[0]=191;
                    game=3;
                }
                if(y[0]<1){
                    y[0]=1;
                    game=3;
                }
                if(x[0]>191){
                    x[0]=191;
                    game=3;
                }
                if(x[0]<1){
                    x[0]=1;
                    game=3;
                }
                if(game==3){
                    if(count<(1500/level)){
                        count++;
                    }
                    else{
                        count=0;
                        game=1;
                        repaint();
                        setTime.stop();
                    }
                }
                repaint();
                try{
                    Thread.sleep(level);
                }catch(InterruptedException e){   
                }
            }
        }
        public void locateRandom(int turn){
            rtemp=(int)(Math.random()*20);
            x[turn]=((rtemp*10)+1);
            rtemp=(int)(Math.random()*20);
            y[turn]=((rtemp*10)+1);
            n++;
        }
        public boolean keyDown(Event e,int key){
            if((key==Event.LEFT)&&(!right)){
                left=true;
                up=false;
                down=false;
                if(!started)
                    started=true;
            }
            if((key==Event.RIGHT)&&(!left)){
                right=true;
                up=false;
                down=false;
                if(!started)
                    started=true;
            }
            if((key==Event.UP)&&(!down)){
                up=true;
                left=false;
                right=false;
                if(!started)
                    started=true;
            }
            if((key==Event.DOWN)&&(!up)){
                up=true;
                left=false;
                right=false;
                if(!started)
                    started=true;
            }
            return true;
        }

        public boolean action(Event event,Object obj){
            stemp=(String)obj;
            if(stemp.equals("初级")){
                add=2;
                level=100;
                setTime=new Thread(this);
                setTime.start();
                return true;
            }
            if(stemp.equals("中级")){
                add=5;
                level=70;
                setTime=new Thread(this);
                setTime.start();
                return true;
            }
            if(stemp.equals("高级")){
                add=10;
                level=40;
                setTime=new Thread(this);
                setTime.start();
                return true;
            }
            if(stemp.equals("专家级")){
                add=20;
                level=20;
                setTime=new Thread(this);
                setTime.start();
                return true;
            }
            return false;
        }
}