cortrol.java

游戏学院学过的一个J2ME代码实例的整理

package npc7776;
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;

public class cortrol
    extends GameCanvas
    implements CommandListener, Runnable {
  Image imgs;
  Graphics g;
  Plane plane;
  backdrop back;
  bullet bullet;
  Thread thread = null;
  planemain mainScreen;

  public cortrol(planemain mainScreen) {
    super(true);
    this.mainScreen= mainScreen;
    g = this.getGraphics();
    try {
      jbInit();
    }
    catch (Exception e) {
      e.printStackTrace();
    }
    plane = new Plane(imgs, 24, 24, this.getWidth(),this.getHeight());
    bullet = new bullet();
    back = new backdrop(this.getHeight());


    thread = new Thread(this);
    thread.start();
  }

  private void jbInit() throws Exception {
    imgs = Image.createImage("/res/planes.png");

    setCommandListener(this);

    addCommand(new Command("Exit", Command.EXIT, 1));
  }

  public void commandAction(Command command, Displayable displayable) {

    if (command.getCommandType() == Command.EXIT) {

      mainScreen.goBack();
    }
  }

  public void keyInput() {
    plane.hf();
    if ( (this.getKeyStates() & this.LEFT_PRESSED) != 0) {
      plane.moveLeft();
    }
    if ( (this.getKeyStates() & this.RIGHT_PRESSED) != 0) {
      plane.moveRight();
    }
    if ( (this.getKeyStates() & this.UP_PRESSED) != 0) {
      plane.moveUp();
    }
    if ( (this.getKeyStates() & this.DOWN_PRESSED) != 0) {
      plane.moveDown();
    }
    if ( (this.getKeyStates() & this.FIRE_PRESSED) != 0) {
      bullet.addBullet(plane.x, plane.y, 24);
    }
  }
  public void stop(){
    thread = null;
  }


  public void clear() {
     g.setColor(back.getGroundColor());
     g.fillRect(0, 0, this.getWidth(), this.getHeight());
   }

  public void run() {
    while (true) {

      clear();
      keyInput();
      plane.drawSelf(g);
      bullet.drawSelf(g);
      bullet.move();
      back.scrollTerrain(g);
      this.flushGraphics();

      try {
        thread.sleep(100);
      }
      catch (Exception e) {}

    }
  }

}