myrms.java

Java游戏沙丘城堡源代码/Java游戏沙丘城堡源代码

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.rms.RecordStore;
import com.nokia.mid.ui.FullCanvas;


public class MyRms extends FullCanvas
{
	//排行榜画面
	private Image back;
	private static Displayable instance;
	//创建并得到一个排行榜画面的对象
	synchronized public static Displayable getInstance()
	{
	    if(instance == null)
			instance = new MyRms();
		return instance;
	}
	//排行榜画面的构造方法，加入了2个按钮
	private MyRms()
	{
		super();
		this.setFullScreenMode(true);
		back = null;
		try
		{
			back = Image.createImage("/res/back.png");
		}
		catch(Exception e)
		{}
	}

	protected void paint(Graphics g) 
	{
		//打开数据库
		try 
		{
			GameMIDlet.rs = RecordStore.openRecordStore(GameMIDlet.RecordName,false);
		} 
		catch (Exception e) 
		{
			System.out.println("打开数据库失败");
		}
		GameRMS rd = new GameRMS();
		g.setColor(0,0,0);
		g.fillRect(0,0,getWidth(),getHeight());
		g.setColor(255,255,0);
		g.setFont(Font.getFont(Font.FACE_PROPORTIONAL,Font.STYLE_PLAIN,Font.SIZE_SMALL));
    	g.drawString("排行榜",getWidth()/2-25,10,Graphics.TOP|Graphics.LEFT);
    	
    	g.drawString("名次  姓名     得分",10,31,Graphics.TOP|Graphics.LEFT);
    	g.drawString("---------------------------------------",-10,54,Graphics.TOP|Graphics.LEFT);
    	//使用排行榜数据解码器，将从数据库中得到的数据，转换成玩家姓名和分数
    	for(int i=1;i<=5;i++)
    	{
    		
				try {
					rd.decode(GameMIDlet.rs.getRecord(i));
				} catch (Exception e) 
				{
					System.out.println("读取数据库失败");
				}
			
    		//将得到的玩家姓名和分数在画面上打印出来
    		g.drawString("  "+i+"     "+rd.name,10,50+i*20,Graphics.TOP|Graphics.LEFT);
    		g.drawString("     "+rd.score,80,50+i*20,Graphics.TOP|Graphics.LEFT);
    	}
    	try {
			rd.decode(GameMIDlet.rs.getRecord(10));
		} catch (Exception e) 
		{
			System.out.println("读取数据库失败");
		}
    	//关闭数据库
    	try
		{
		    GameMIDlet.rs.closeRecordStore();
		}catch(Exception e)
		{
		 	System.out.println("关闭数据库失败");
		}
		g.drawImage(back,getWidth(),getHeight(),Graphics.BOTTOM|Graphics.RIGHT);
	}
	
   protected void keyPressed(int key) 
   {
       if (key == -7)
	   {    
	   		GameMenu.flow("返回");
	   }
   }
}