showrecords.java

用java写的一个将记录显示在屏幕上的类 希望大家能用得上

import javax.microedition.lcdui.*;
import java.io.*;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2006</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class ShowRecords implements GameData
{
    //传递来的游戏框架
    private MainMenu m_menu = null;
    //记录 名字，分数
    private String[] recordNames = new String[RECORD_LENGTH];
    private long[] recordScores = new long[RECORD_LENGTH];

    public ShowRecords(MainMenu a_menu)
    {
        //加载记录，并存到recordNames和recordScores中
        m_menu = a_menu;
        ByteArrayInputStream bais = ToolBox.loadRecord(RECORDSTROE_KEY);
        if(bais == null)
        {
            return;
        }

        for(int i=0; i<RECORD_LENGTH; i++)
        {
            recordNames[i] = null;
            recordScores[i] = 0;
        }
        DataInputStream dis = new DataInputStream(bais);
        for(int i=0; bais.available()>0 && i<5; i++)
        {
            try
            {
                recordNames[i] = dis.readUTF();
                recordScores[i] = dis.readLong();
            }
            catch(Exception e){e.printStackTrace();}
        }
        try
        {
            dis.close();
            dis = null;
            bais.close();
            bais = null;
        }
        catch (IOException ex){ex.printStackTrace();}
    }

    /**
     * 将记录显示在屏幕上
     *
     * @param g Graphics
     */
    public void paint(Graphics g)
    {
        int x1 = 25;
        int x2 = 150;
        int y = 50;
        int yStep = 10;

        g.setColor(0, 200, 200);
        g.drawString("here are the records:", 0, 0, 0);

        if(recordNames[0] == null)
        {
            g.drawString("no record!", 50, 50, 0);
            ToolBox.paintTwinkleString(g, "Press any key to back...", SCREEN_WIDTH/2, SCREEN_HEIGHT-7, g.BOTTOM|g.HCENTER);
            return;
        }
        for(int i=0; i<RECORD_LENGTH; i++)
        {
            if(recordNames[i] == null)
            {
                //如果不足五项，则用"__"填充
                g.drawString((i+1)+".  __"+"", x1, y+i*yStep, g.TOP|g.LEFT);
                g.drawString(0+"", x2, y+i*yStep, g.TOP|g.RIGHT);
                continue;
            }
            g.setColor(255, 0, 0);
            g.drawString((i+1)+".  "+recordNames[i], x1, y+i*yStep, g.TOP|g.LEFT);
            g.drawString(recordScores[i]+"", x2, y+i*yStep, g.TOP|g.RIGHT);
        }
        g.setColor(0, 200, 200);
        ToolBox.paintTwinkleString(g, "Press any key to back...", SCREEN_WIDTH/2, SCREEN_HEIGHT-7, g.BOTTOM|g.HCENTER);
    }

    /**
     * 任意键返回
     */
    public void update()
    {
        if(Canvas0.isKeyDown(KEY_LEFT) || Canvas0.isKeyDown(KEY_RIGHT) || Canvas0.isKeyDown(KEY_UP) || Canvas0.isKeyDown(KEY_DOWN) || Canvas0.isKeyDown(KEY_FIRE) || Canvas0.isKeyDown(SOFT_KEY_LEFT) || Canvas0.isKeyDown(SOFT_KEY_RIGHT))
        {
            m_menu.changeState(m_menu.STATE_MENU);
        }
    }
}