helpscreen.java

这是一个魔塔游戏的源代码

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

public class HelpScreen extends GameCanvas
implements Runnable
{
	private Display display;
	private MainMenu menu;
	private Image splashImage = GameScreen.getImage(GameScreen.IMAGE_BORDER2);
	private boolean isShowing;
	//private int tick = 0;
	
	public HelpScreen(Display display,MainMenu menu)
	{
		super(false);
		this.display = display;
		this.menu = menu;
		this.setFullScreenMode(true);
	}
	
	private void render(Graphics g)
	{
		int x = menu.borderX +10;
		int y = menu.borderY +5;
		int split = 14;
		g.setColor(0,0,0);
		g.fillRect(0,0,getWidth(),getHeight());
		g.drawImage(splashImage,menu.borderX,menu.borderY,Graphics.TOP | Graphics.LEFT);
		g.setColor(255,200,0);
		g.drawString("             帮    助",x,y,Graphics.TOP | Graphics.LEFT);
		g.drawString("游戏的操作非常简单，",x,y+split,Graphics.TOP | Graphics.LEFT);
		g.drawString("使用方向键可以行走，",x,y+2*split,Graphics.TOP | Graphics.LEFT);
		g.drawString("遇到怪物会自动攻击，",x,y+3*split,Graphics.TOP | Graphics.LEFT);
		g.drawString("但如果无法赢得战斗，",x,y+4*split,Graphics.TOP | Graphics.LEFT);
		g.drawString("英雄就不会进行攻击。",x,y+5*split,Graphics.TOP | Graphics.LEFT);
		g.drawString("游戏中还会遇到很多宝",x,y+6*split,Graphics.TOP | Graphics.LEFT);
		g.drawString("物，而且有其使用说明",x,y+7*split,Graphics.TOP | Graphics.LEFT);
		g.drawString("和介绍。祝您早日救出",x,y+8*split,Graphics.TOP | Graphics.LEFT);
		g.drawString("美丽的公主 :)",x,y+9*split,Graphics.TOP | Graphics.LEFT);
		flushGraphics();
	}
	
	protected void keyPressed(int keyCode)
	{
		stop();
	}
	
	public void start()
	{
		isShowing = true;
		Thread t = new Thread(this);
		t.start();
	}
	private void stop()
	{
		isShowing = false;
		display.setCurrent(menu);
		menu.start();
	}
	
	public void run()
	{
		Graphics g = getGraphics();
		long startTime = 0;
	  	long timeTake = 0;
		while(isShowing == true)
		{
			startTime = System.currentTimeMillis();
		    
			render(g);
			//tick++;
			//if(tick == 10)stop();
			timeTake = System.currentTimeMillis() - startTime;
			if (timeTake < GameScreen.MILLIS_PER_TICK)
	  		{
	  	        try
	  			{
	  				
	  				Thread.sleep(GameScreen.MILLIS_PER_TICK - timeTake);
	  			} catch(InterruptedException e){System.out.println(e);} 
	  		}
		}
	}
}