Java_ Pinball Game

Pinball Game Implementation principle:

Redraw the image at a certain time (less than 1 seconds) because the graphics class is an abstract class that requires rewriting all the methods involved when creating subclasses, so this is done by creating a subclass of the canvas, just overriding its paint () method. Here we use the keyboard to listen to events, Timer class and so on.

Game Description:

The ball in the pinball game increases speed over time and speeds up to 10 of the horizontal and vertical velocities. When the y-coordinate (vertical coordinate) of the ball is greater than the y-coordinate of the racket (vertical coordinate), the game ends. The console shows the speed of the X-direction of the ball and the speed of the Y-direction.

1 Importjava.awt.*;2 ImportJava.util.Random;3 ImportJavax.swing.Timer;4 Importjava.awt.event.*; 5  Public classPinball6 {7     PrivateFrame f=NewFrame ("Pinball Game");8Random rand=NewRandom ();9     //width and height of the desktopTen     Private Final inttable_width=300; One     Private Final inttable_height=400; A     //width and height of racquet, horizontal position, vertical position -     Private Final intRacket_width=60; -     Private Final intRacket_height=20; the     Private intRacketx=rand.nextint (24) *10; -     Private intrackety=300; -     //the size, speed, and coordinates of the ball -     Private Final intBall_size=16; +     Private intYspeed=1; -     Private DoubleXyrate=1; +     Private intXspeed= (int) (xyrate*yspeed); A     Private intBallx=rand.nextint (284); at     Private intBally=1; -     //Create a canvas -     PrivateMyCanvas tablearea=NewMyCanvas (); -     //Defining Time Classes - timer timer; -     //Flag of whether the game is over in     Private BooleanIslose=false; -     //set the game level to     Private intTime_times=1; +      Public voidinit () { -Tablearea.setpreferredsize (NewDimension (table_width,table_height)); the F.add (Tablearea); *         //defining keyboard Listeners $Keyadapter keyprocessor=NewKeyadapter ()Panax Notoginseng         { -              Public voidkeypressed (keyevent ke) { the                 if(Ke.getkeycode () = =keyevent.vk_left) { +                     if(racketx>0) Aracketx-=10; the                 } +                 if(Ke.getkeycode () = =keyevent.vk_right) { -                     if(racketx<table_width-racket_width) $racketx+=10; $                 } -             } -  the         }; - F.addkeylistener (keyprocessor);Wuyi         //Tablearea.addkeylistener (keyprocessor); theActionListener taskperformer=evt-> -         { Wu             //The ball touches the left or right border . -             if(ballx<=0| | ballx>=table_width-ball_size) { Aboutxspeed=-xspeed; $             } -             if(bally>rackety-ball_size&& (ballx<racketx| | ballx>racketx+racket_width-ball_size)) { - timer.stop (); -Islose=true; A tablearea.repaint (); +}Else if(bally<=0| | (bally>=rackety-ball_size&&ballx>racketx&&ballx<=racketx+racket_width)) { theyspeed=-Yspeed; -             } $bally+=Yspeed; theballx+=xspeed; the tablearea.repaint (); the             if((xspeed<10&&xspeed>-10) && (yspeed<10&&yspeed>-10)){ thetime_times++; -             } in             if(time_times==10){ the                 if(xspeed>0){ thexspeed++; About}Else{ thexspeed--; the                 } the                 if(yspeed>0){ +yspeed++; -}Else{ theyspeed--;Bayi                 } thetime_times-=10; theSystem.out.println (xspeed+ "" +yspeed); -             } -         }; theTimer=NewTimer (100, Taskperformer); the Timer.start (); the F.pack (); theF.setvisible (true); -     } the     classMyCanvasextendsCanvas the     { the          Public voidPaint (Graphics g) {94             if(islose) { theG.setcolor (NewColor (255,0,0)); theG.setfont (NewFont ("Times", font.bold,30)); theg.DrawString ("Game Over", 50,200);98}Else{ AboutG.setcolor (NewColor (240,240,80)); - G.filloval (ballx,bally,ball_size,ball_size);101G.setcolor (NewColor (80,80,200));102 G.fillrect (racketx,rackety,racket_width,racket_height);103             }104         } the     }106      Public Static voidMain (string[] args)107     {108         NewPinball (). Init ();109     } the}

Java_ Pinball Game