symbol.java

本j2me坦克游戏是在Nokia平台下开发的

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */
import java.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;


public class Symbol {
    public static Graphics G = null;
    Image symbol;
    Image onTimer;
    Image bulletStar;
    Image bomber;
    Image homeWall;
    Image bonusTanker;
    Image cap;
    Image back;
    public int symbolState;  //represent the symbol's state,0-nothing,1-timer,2-star,3-bomber,4-homeWall,5-tanker,6-cap
    public int symbolX;
    public int symbolY;
    public int formerSymbolX;
    public int formerSymbolY;
    public int symbolWidth;
    public int symbolHeight;
    int count = 1;

    public Symbol() {
        symbolState = 0;
        symbolX = -1;
        symbolY = -1;
        formerSymbolX = -1;
        formerSymbolY = -1;
        try {
            symbol = Image.createImage("/symbols.png");
            
            symbolWidth = symbol.getWidth()/3;
            symbolHeight = symbol.getHeight()/2;
            
            bomber = Image.createImage(symbolWidth, symbolHeight);
            G = bomber.getGraphics();
            G.drawImage(symbol, 0, 0, 20);   //20:g.topleft

            bulletStar = Image.createImage(symbolWidth, symbolHeight);
            G = bulletStar.getGraphics();
            G.drawImage(symbol, -symbolWidth, 0, 20);   //20:g.topleft

            bonusTanker = Image.createImage(symbolWidth, symbolHeight);
            G = bonusTanker.getGraphics();
            G.drawImage(symbol, -symbolWidth*2, 0, 20);   //20:g.topleft

            onTimer = Image.createImage(symbolWidth, symbolHeight);
            G = onTimer.getGraphics();
            G.drawImage(symbol, 0,-symbolHeight, 20);   //20:g.topleft

            homeWall = Image.createImage(symbolWidth, symbolHeight);
            G = homeWall.getGraphics();
            G.drawImage(symbol, -symbolWidth, -symbolHeight, 20);   //20:g.topleft

            cap = Image.createImage(symbolWidth, symbolHeight);
            G = cap.getGraphics();
            G.drawImage(symbol, -symbolWidth*2, -symbolHeight, 20);   //20:g.topleft

            back = Image.createImage("/symbolback.png");

        }
        catch(Exception exception) {
            System.out.println(exception);
        }

    }

    synchronized void paint(Graphics g) {
        if(count%3 != 0){
            switch (symbolState) {
                case 1:
                    g.drawImage(onTimer, symbolX, symbolY, 20);
                    break;
                case 2:
                    g.drawImage(bulletStar, symbolX, symbolY, 20);
                    break;
                case 3:
                    g.drawImage(bomber, symbolX, symbolY, 20);
                    break;
                case 4:
                    g.drawImage(homeWall, symbolX, symbolY, 20);
                    break;
                case 5:
                    g.drawImage(bonusTanker, symbolX, symbolY, 20);
                    break;
                case 6:
                    g.drawImage(cap, symbolX, symbolY, 20);
                    break;
                default:
                    break;
            }
        }else{
           g.drawImage(back,symbolX, symbolY, 20);
           count = 0;
        }
        count++;
    }

}