自己编写J2me弹球代码

package com; import java.util.Random; import javax.microedition.lcdui.*; import javax.microedition.lcdui.game.GameCanvas; import mainMid.MyBallMidlet; public class Guan2Canvas extends GameCanvas implements Runnable{ protected MyBall m_Ball; protected MyBar m_Bar; private IronRingPre m_ironRing; int ringX,ringY; int ballLength; protected int sWidth; protected int sHeight; protected boolean m_bRunning; //控制线程运行 protected int ballScore; protected int guan; protected boolean isLive; protected Random rm; private boolean isMove; private MyBallMidlet mid; public Guan2Canvas(MyBallMidlet mid){ super(false); this.mid=mid; isMove=false; isLive=true; sWidth=getWidth(); sHeight=getHeight(); ballScore=0; guan=2; rm=new Random(); m_ironRing=new IronRingPre(); m_ironRing.size=50; m_ironRing.x=(sWidth-m_ironRing.size)/2+30; m_ironRing.y=80; ringX=m_ironRing.x+m_ironRing.size/2; ringY=m_ironRing.y+m_ironRing.size/2; m_Bar=new MyBar(); m_Ball=new MyBall(); m_Bar.width=50; m_Bar.heigth=10; m_Bar.x=(sWidth-m_Bar.width)/2; m_Bar.y=sHeight-m_Bar.heigth-16; m_Bar.step=2; m_Ball.R=200; m_Ball.G=240; m_Ball.B=0; m_Ball.size=20; m_Ball.xStep=1; m_Ball.yStep=1; m_Ball.x=(sWidth-m_Ball.size)/2; m_Ball.y=sHeight-m_Ball.size-m_Bar.heigth-16; ballLength=(m_ironRing.size/2+m_Ball.size/2)*(m_ironRing.size/2+m_Ball.size/2); Start(); } public void Start(){ m_bRunning = true; Thread thread = new Thread(this); //分配新线程 thread.start(); pp();//线程启动 } public void run() { //新线程自动调用此方法 //获取系统当前时间，并将时间换算成以毫秒为单位的数 long T1 = System.currentTimeMillis(); long T2 = T1; while(m_bRunning){ T2 = System.currentTimeMillis(); if( T2 - T1 > 15 ){ //间隔100毫秒 T1 = T2; Input(); if(isMove) Logic(); repaint(); } } } public void Stop(){ //终止游戏 m_bRunning = false; } public void keyPressed(int code){ if(code==-5){ m_Ball.startMove(); try { Thread.sleep(80); isMove=true; } catch (InterruptedException ex) { ex.printStackTrace(); } } } public void paint(Graphics g) { //清屏 g.setColor(144,197,252); g.fillRect(0, 20, getWidth(), getHeight()-20); //信息 g.setColor(0); g.fillRect(0, 0, getWidth(), 20); g.setColor(255, 255, 255); g.drawString("当前关数："+guan, 20, 2, 0); g.drawString("当前得分："+ballScore, 150, 2, 0); g.setColor(0); g.drawString("第"+guan+"关", sWidth/2-40, 100, 0); g.drawString("按中间键启动小球", sWidth/2-45, 130, 0); g.drawString("获得7分即可过关", sWidth/2-60, 155, 0); g.setColor(255, 0, 0); g.drawString("注意：铁环会阻挡球哦！", sWidth/2-60, 167, 0); if(!isLive) { g.setColor(0); g.drawString("Game Over", sWidth/2-25, 180, 0); } m_Bar.Paint(g); g.setColor(m_Ball.R, m_Ball.G, m_Ball.B); m_Ball.Paint(g); m_ironRing.paint(g); } private void Input() { if (isLive) { int keyStates = getKeyStates(); //得到当前按键状态 //如果按下方向键的左键，则bar向左移动 if ((keyStates & GameCanvas.LEFT_PRESSED) != 0) { if (m_Bar.x > 0) { m_Bar.x -= m_Bar.step; if (m_Ball.y == sHeight - m_Ball.size - m_Bar.heigth-16 && (m_Ball.x + m_Ball.size / 2 >= m_Bar.x || (m_Ball.x + m_Ball.size / 2 <= m_Bar.x + m_Bar.width))) { m_Ball.x -= m_Bar.step; } } } //如果按下方向键的右键，则Bar向右移动 if ((keyStates & GameCanvas.RIGHT_PRESSED) != 0) { if (m_Bar.x < sWidth - m_Bar.width) { if (m_Ball.y == sHeight - m_Ball.size - m_Bar.heigth-16 && (m_Ball.x + m_Ball.size / 2 >= m_Bar.x || (m_Ball.x + m_Ball.size / 2 <= m_Bar.x + m_Bar.width))) { m_Ball.x += m_Bar.step; } m_Bar.x += m_Bar.step; } } } } //判断情况 public void pp() { new Thread() { public void run() { while (true) { int ballx = m_Ball.x + m_Ball.size / 2; int bally = m_Ball.y + m_Ball.size / 2; if ((ballx - ringX) * (ballx - ringX) + (bally - ringY) * (bally - ringY) < ballLength) { m_Ball.xStep = -m_Ball.xStep; m_Ball.yStep = -m_Ball.yStep; } } } }.start(); } private void Logic() { if (m_Ball.x <=0 || m_Ball.x >sWidth - m_Ball.size) { m_Ball.xStep = -m_Ball.xStep; } if (m_Ball.y <= 20) { m_Ball.yStep = -m_Ball.yStep; } if (m_Ball.y >sHeight - m_Ball.size) { m_Ball.m_Running = false; isLive = false; } if (m_Ball.y >= sHeight - m_Ball.size - m_Bar.heigth-16 && m_Ball.x + m_Ball.size / 2 >= m_Bar.x && (m_Ball.x + m_Ball.size / 2 <= m_Bar.x + m_Bar.width)) { m_Ball.yStep = -m_Ball.yStep; ballScore++; m_Ball.R = rm.nextInt(256); try { Thread.sleep(10); } catch (InterruptedException ex) { ex.printStackTrace(); } m_Ball.G = rm.nextInt(256); try { Thread.sleep(10); } catch (InterruptedException ex) { ex.printStackTrace(); } m_Ball.B = rm.nextInt(256); } } }