bg.java

java编程的一些Applets例子。值得深入研究一下。

// 3-D TENNIS (by.Eiji Ito)



import java.applet.*;

import java.awt.*;



public class BG extends java.applet.Applet implements Runnable {



int X,Y,G,T=3,P,Q,R,W=1,XF,YF,XX,YY,XA=200,YA=200,

    TURN,NE=10,SPEED=200,IN=0,SCORE,START;



int LEVEL=0,XR=100,YR=70,GR=14,TR=2,RR=1,PR=0,QR=0,

    XFR=0,YFR=1,XXR=300,YYR=220,CR=0;



Thread count = null;



public void init(){

                  resize(520,500);

                  }



public boolean mouseDown(Event e, int x, int y){

        if(x > 29 && x < 100 && y > 1 && y < 16){

        W=0;START=1;TURN=0;LEVEL=0;R=1;RR=1;SCORE=0;SPEED=200;NE=10;G=15;

        X=100;Y=70;XX=220;YY=220;CR=0;P=0;Q=0;XF=0;YF=0;T=3;

        XR=100;YR=70;

        repaint();}

        return(true);

                                               }



public boolean mouseMove(Event f, int x, int y){

        if( x >= 200 && x <= 275){XA=x;}

        if( y >= 200 && y <= 275){YA=y;}

        if( x > 275){XA = 275;}

        if( y > 275){YA = 275;}

        if( x < 200){XA = 200;}

        if( y < 200){YA = 200;}

        if(LEVEL == 2 || LEVEL >= 6){repaint();}

        return(true);

                                        }



public void paint(Graphics g){



if(START==1){

 for(int i=1;i<100;i++){

                        g.setColor(new Color((int)(Math.random()*255),

                        (int)(Math.random()*255),(int)(Math.random()*255)));

                        g.fillRect(0,0,550,500);

                        g.setColor(Color.black);

                        g.drawString ("- START -",213,250);

                        g.drawString ("- START -",214,250);

                        }

             }



 g.setColor(Color.black);

 if(CR > 254){CR = 0;}

 if(LEVEL == 1 ||  LEVEL >= 3){ g.setColor(new Color(0,0,CR));CR++;}

 g.fillRect(0,0,520,500);

 g.setColor(Color.blue);

 g.drawRect(200,200,100,100);

 g.drawRect(0,0,500,500);

 g.drawLine(0,0,200,200);

 g.drawLine(0,500,200,300);

 g.drawLine(300,200,500,0);

 g.drawLine(300,300,500,500);



 g.drawString ("SCORE : ",210,15);

 g.drawString (Integer.toString(SCORE),270,15);

 g.setColor(Color.white);

 g.drawString ("SCORE : ",208,13);

 g.drawString (Integer.toString(SCORE),272,13);



 if(LEVEL == 0 ){

                 g.setColor(Color.white);

                 g.drawRect(30,1,51,16);

                 g.drawString ("START",37,14);

                 g.drawString ("START",38,14);

                }

            else

                {

                 g.setColor(Color.white);

                 g.drawRect(30,1,70,15);

                 g.drawString ("LEVEL",38,14);

                 g.drawString (Integer.toString(LEVEL+1),87,14);

                 g.setColor(Color.red);

                 g.drawString ("LEVEL",37,13);

                 g.drawString (Integer.toString(LEVEL+1),86,13);

                }



 if(NE==499){



        for(int i=0;i<100;i++){

                                g.setColor(Color.white);

                                g.drawString ("- GAME OVER -",206,250);

                                g.setColor(Color.red);

                                g.drawString ("- GAME OVER -",205,249);

                              }



            }



 g.setColor(Color.red);

 g.drawRect(470,NE+5,30,490);

 g.setColor(Color.pink);

 g.drawRect(475,NE,30,490);



 g.setColor(new Color(144,203,254));

 if(START==3){ g.setColor(new Color(253,254,104));}

 g.drawRect(XA,YA,25,25);

 g.drawRect(XA+2,YA+2,21,21);



 START = 2;



if(W==0){



/* GREEN BALL START */



 T=T+2;

 if(T>10){T = 10;}

 if(T<1){T = 1;}

 if(R==0){G = G - T;}

 if(R==1){G = G + T;}

 if(G < 14 ){G = 14;}

 if(G > 150){G = 150;R = 0;T=0;

 XF = (int)(Math.random()*2);

 YF = (int)(Math.random()*2);

 XX = XX + (int)(Math.random()*10);

 YY = YY + (int)(Math.random()*10);}



 P = (G/2);Q = (P/2);

 XX = 200 - P;

 YY = 300 + P;

 if(XF == 0){X=X-Q;}else{X=X+Q;}

 if(YF == 0){Y=Y-Q;}else{Y=Y+Q;}

 if(X+P < XX){XF = 1;X =XX+P;}

 if(X-P > YY){XF = 0;X =YY-P;}

 if(Y+P < XX){YF = 1;Y =XX+P;}

 if(Y-P > YY){YF = 0;Y =YY-P;}



 g.setColor(Color.green);

 if(LEVEL==2){g.setColor(Color.yellow);SPEED=250;}

 if(LEVEL==3){;SPEED=100;}

 if(SCORE > 450 && SCORE <= 570 ){g.setColor(Color.blue);LEVEL = 4;SPEED=70;}

 if(SCORE > 570 ){g.setColor(Color.pink);LEVEL = 5;SPEED=60;}

 if(SCORE > 670 && SCORE < 770 ){g.setColor(Color.red);LEVEL = 6;SPEED=500;}

 if(SCORE > 770 ){g.setColor(Color.black);LEVEL = 7;}

 g.drawArc(X-P,Y-P,G,G,0,360);



 for(int i=2;i<4;i++){

                      g.drawArc(X-P,Y-P+i*2,G,G-i*4,0,360);

                      g.drawArc(X-P+i*2,Y-P,G-i*4,G,0,360);

                     }



 g.drawArc(X-P+Q,Y-P,G-P,G,0,360);

 g.drawArc(X-P,Y-P+Q,G,G-P,0,360);



/* RED BALL START*/



if(LEVEL == 1 || LEVEL > 2){



 TR=TR+2;

 if(TR>10){TR = 10;}

 if(TR<1){TR = 1;}

 if(RR==0){GR = GR - TR;}

 if(RR==1){GR = GR + TR;}

 if(GR < 14 ){GR = 14;}

 if(GR > 150){GR = 150;RR = 0;TR=0;

 XFR = (int)(Math.random()*2);

 YFR = (int)(Math.random()*2);

 XXR = XXR + (int)(Math.random()*15)-5;

 YYR = YYR + (int)(Math.random()*15)-5;}



 PR = (GR/2);QR = (PR/2);

 XXR = 200 - PR;

 YYR = 300 + PR;

 if(XFR == 0){XR=XR-QR;}else{XR=XR+QR;}

 if(YFR == 0){YR=YR-QR;}else{YR=YR+QR;}

 if(XR+PR < XXR){XFR = 1;XR =XXR+PR;}

 if(XR-PR > YYR){XFR = 0;XR =YYR-PR;}

 if(YR+PR < XXR){YFR = 1;YR =XXR+PR;}

 if(YR-PR > YYR){YFR = 0;YR =YYR-PR;}



 g.setColor(Color.red);

 g.drawArc(XR-PR,YR-PR,GR,GR,0,360);



 for(int i=2;i<4;i++){

                      g.drawArc(XR-PR,YR-PR+i*2,GR,GR-i*4,0,360);

                      g.drawArc(XR-PR+i*2,YR-PR,GR-i*4,GR,0,360);

                     }



 g.drawArc(XR-PR+QR,YR-PR,GR-PR,GR,0,360);

 g.drawArc(XR-PR,YR-PR+QR,GR,GR-PR,0,360);



/* Red Check */



 if(RR == 0 && GR < 20 && XR+PR >= 200 && XR-PR >= 200 && YR+PR <= 300 &&

YR-PR <= 300)

   {GR = 14 ;RR = 1;TR=0;NE = NE + 70;

    if(XR+PR >= XA && XR+PR <= XA+35 && YR+PR >= YA && YR+PR <= YA+40)

     {NE = NE - 70;TURN++;SCORE=SCORE+10;START=3;}

      else{ g.setColor(Color.yellow);

       g.fillRect(510,NE-70,30,490);}}



                               }



/* Green Check */



 if(R == 0 && G < 20 && X+P >= 200 && X-P >= 200 && Y+P <= 300 && Y-P <= 300)

   {G = 14 ;R = 1;T=0;NE = NE + 50;

    if(X+P >= XA && X+P <= XA+35 && Y+P >= YA && Y+P <= YA+40)

     {NE = NE - 50;TURN++;SCORE=SCORE+15;;START=3;}

      else{ g.setColor(Color.yellow);

       g.fillRect(475,NE-50,30,490);}}



 if(NE >= 490){NE=499;W=1;}



 if(TURN == 5){LEVEL = 1;GR = 100;TURN = 6;}

 if(TURN == 15){LEVEL = 2;GR = 100;TURN = 16;}

 if(TURN == 20){LEVEL = 3;GR = 100;TURN = 21;}



 if(TURN > 50){SPEED = SPEED - 1;}

// if(LEVEL > 4){SPEED = 50;}



}



}



public void update(Graphics g){

paint(g);

                              }



public void start() {

   if(count == null)

   {count = new Thread(this);

    count.start();}

                    }



public void run() { while(count != null)

{

   while (count != null){

   try{Thread.sleep(SPEED);}

   catch (InterruptedException e){}

   if(IN==0){repaint();}

                        }

   count = null;}}



public void stop() {count.stop();count = null;}



}