balloons.java

英语背单词联网版本

/*
 * balloons.java
 *
 * Created on 2003年11月18日, 上午9:15
 */

package handenglish;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import java.util.Random;
/**
 *
 * @author  com
 * @version
 */
public class Balloons {
    public final int MOVESTEP=3;
    public final int BLACK=00000000;
    public final int BALLOONNUM=8;
    public final int LETTERTOTAL=26;
    public final int dt=9;
    public final int dx=18;
    public final int dy=22;
    private Words words;
    private final KeyRepeator gc;
    private Random random;
    private Image airBalloon,blast;
    public char[] balloonLetter;
    private int[] color,tagx,tagy;
    public int hitNum;
    public Balloons(KeyRepeator ui){
        gc=ui;
        hitNum=0;
        random = new Random();
        balloonLetter=new char[BALLOONNUM];
        color=new int[BALLOONNUM];
        tagx=new int[BALLOONNUM];
        tagy=new int[BALLOONNUM];
        tagx[0]=10;tagy[0]=-10;
        tagx[1]=52;tagy[1]=-20;
        tagx[2]=95;tagy[2]=-4;
        tagx[3]=29;tagy[3]=28;
        tagx[4]=66;tagy[4]=40;
        tagx[5]=105;tagy[5]=64;
        tagx[6]=14;tagy[6]=73;
        tagx[7]=60;tagy[7]=90;
        for(int i=0;i<BALLOONNUM;i++){
            color[i]=i;
            balloonLetter[i]=getLetter();
        }
        try{
            airBalloon=Image.createImage("/handenglish/images/balloons.png");
            blast=Image.createImage("/handenglish/images/blast.png");
        }catch( Exception e ){
        }
    }
    
    /**
     *气球上的字母
     */
    public char getLetter(){
      int ran = Math.abs( random.nextInt())%LETTERTOTAL + 97;
      return (char) ran;
      
    }
    /**
     *画气球
     */
    public void draw(Graphics g,int[] m){
        for(int i=0;i<BALLOONNUM;i++){
            if(m[i]==0){
                g.setClip(tagx[i],tagy[i],18,45);
                g.drawImage(airBalloon,tagx[i]-18*color[i],tagy[i],g.TOP|g.LEFT);
                g.setColor(BLACK);
                g.drawChar(balloonLetter[i],tagx[i]+5,tagy[i],g.TOP|g.LEFT);
            }
            else if(m[i]>=1&&m[i]<=3){
                g.setClip(tagx[i]-14,tagy[i]-10,46,43);
                g.drawImage(blast,tagx[i]-14-(m[i]-1)*46,tagy[i]-10,g.TOP|g.LEFT);
            }
        }
    }
    
    /**
     *是否打到气球
     */
    public char isHit(int locx,int locy){
        char key=0;
        for(int i=0;i<BALLOONNUM;i++)
            if(isExit(locx,locy,tagx[i],tagy[i])&&!gc.isBlast(i)){
                key=balloonLetter[i];
                hitNum=i;
                break;
            }
        return key;
    }
    private boolean isExit(int locx,int locy,int tagx,int tagy){
       // boolean a1=false,a2=false,a3=false,a4=false;
        if(locx>=tagx&&locx<=tagx+dx&&locy>=tagy&&locy<=tagy+dy)
            return true;
        if(locx+dt>=tagx&&locx+dt<=tagx+dx&&locy>=tagy&&locy<=tagy+dy)
            return true;
        if(locx>=tagx&&locx<=tagx+dx&&locy+dt>=tagy&&locy+dt<=tagy+dy)
            return true;
        if(locx+dt>=tagx&&locx+dt<=tagx+dx&&locy+dt>=tagy&&locy+dt<=tagy+dy)
            return true;
        //return (a1|a2|a3|a4);
        return false;
    }
    /**
     *判断气球是不是到终点了
     */
    public boolean move(int k){
        if(tagy[k]+MOVESTEP<=128){
            tagy[k]=tagy[k]+MOVESTEP;
            return true;
        }
        else{
            tagy[k]=-27;
            return false;
        }
    }
}