imagehelper.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 javax.microedition.lcdui.*;

public class ImageHelper {
    Image enemyImage;
    static Image drawEnemy;

    static Image enemyLeft;
    static Image enemyRight;
    static Image enemyUp;
    static Image enemyDown;

    static Image enemyLeftRed;
    static Image enemyRightRed;
    static Image enemyUpRed;
    static Image enemyDownRed;

    static Image enemyLeftIron;
    static Image enemyRightIron;
    static Image enemyUpIron;
    static Image enemyDownIron;

    static Image again1;
    static Image again2;
    static Image next1;
    static Image next2;
    static Image back1;
    static Image back2;
    static Image exit1;
    static Image exit2;

    static Image tankerLogo;
    static int logoWidth;
    static int logoHeight;

    static int frameWidth;
    static int frameHeight;

    private static Graphics G = null;


  public ImageHelper() {
      //load the ordinary enemy tank picture
      try {
          enemyImage = Image.createImage("/tank_en.png");
      }
      catch (Exception exception) {
          System.out.println(exception);
      }
      try {
            frameWidth = enemyImage.getWidth() / 4;
            frameHeight = enemyImage.getHeight();
            
            enemyLeft = Image.createImage(frameWidth, frameHeight);
            G = enemyLeft.getGraphics();
            G.drawImage(enemyImage, 0, 0, 20);
            enemyRight = Image.createImage(frameWidth, frameHeight);
            G = enemyRight.getGraphics();
            G.drawImage(enemyImage, -frameWidth, 0, 20);
            enemyUp = Image.createImage(frameWidth, frameHeight);
            G = enemyUp.getGraphics();
            G.drawImage(enemyImage, -frameWidth * 2, 0, 20);
            enemyDown = Image.createImage(frameWidth, frameHeight);
            G = enemyDown.getGraphics();
            G.drawImage(enemyImage, -frameWidth * 3, 0, 20);

            G = null;
            drawEnemy = enemyDown;
        }
        catch (Exception exception) {
            System.out.println(exception);
        }

        //load red tanker picture
        try {
            enemyImage = Image.createImage("/redtank.png");
        }
        catch (Exception exception) {
            System.out.println(exception);
        }
        try {
            frameWidth = enemyImage.getWidth() / 4;
            frameHeight = enemyImage.getHeight();
            enemyLeftRed = Image.createImage(frameWidth, frameHeight);
            G = enemyLeftRed.getGraphics();
            G.drawImage(enemyImage, 0, 0, 20);
            enemyRightRed = Image.createImage(frameWidth, frameHeight);
            G = enemyRightRed.getGraphics();
            G.drawImage(enemyImage, -frameWidth, 0, 20);
            enemyUpRed = Image.createImage(frameWidth, frameHeight);
            G = enemyUpRed.getGraphics();
            G.drawImage(enemyImage, -frameWidth * 2, 0, 20);
            enemyDownRed = Image.createImage(frameWidth, frameHeight);
            G = enemyDownRed.getGraphics();
            G.drawImage(enemyImage, -frameWidth * 3, 0, 20);

            G = null;
            drawEnemy = enemyDown;
        }
        catch (Exception exception) {
            System.out.println(exception);
        }

        //load the iron enemy tank picture
      try {
          enemyImage = Image.createImage("/greentank.png");
      }
      catch (Exception exception) {
          System.out.println(exception);
      }
      try {
            frameWidth = enemyImage.getWidth() / 4;
            frameHeight = enemyImage.getHeight();
            enemyLeftIron = Image.createImage(frameWidth, frameHeight);
            G = enemyLeftIron.getGraphics();
            G.drawImage(enemyImage, 0, 0, 20);
            enemyRightIron = Image.createImage(frameWidth, frameHeight);
            G = enemyRightIron.getGraphics();
            G.drawImage(enemyImage, -frameWidth, 0, 20);
            enemyUpIron = Image.createImage(frameWidth, frameHeight);
            G = enemyUpIron.getGraphics();
            G.drawImage(enemyImage, -frameWidth * 2, 0, 20);
            enemyDownIron = Image.createImage(frameWidth, frameHeight);
            G = enemyDownIron.getGraphics();
            G.drawImage(enemyImage, -frameWidth * 3, 0, 20);

            G = null;
            drawEnemy = enemyDown;
        }
        catch (Exception exception) {
            System.out.println(exception);
        }

        //load the result picture
        try {
            again1 = Image.createImage("/again1.png");
            again2 = Image.createImage("/again2.png");
            next1 = Image.createImage("/next1.png");
            next2 = Image.createImage("/next2.png");
            back1 = Image.createImage("/back1.png");
            back2 = Image.createImage("/back2.png");
            exit1 = Image.createImage("/exit1.png");
            exit2 = Image.createImage("/exit2.png");
            tankerLogo = Image.createImage("/tank.png");
            logoWidth = tankerLogo.getWidth();
            logoHeight = tankerLogo.getHeight();
        }
        catch (Exception exception) {
            System.out.println(exception);
        }

  }

}