highscorerecordstore.java

用J2ME写的一种五子连线的手机游戏。ColorLinez是一款由玩家通过功能键移动各色小球

package game;

import javax.microedition.rms.*;

public class HighScoreRecordStore
{
	/**
	 * 保存最高分
	 * @param name 姓名
	 * @param score 分数
	 * */
    public static void saveHighScore(String name, int score)
    {
    	RecordStore nameRs = null;
    	RecordStore scoreRs = null;
    	int rsNum = 0;
    	byte b[];
    	
    	try
    	{
            //打开记录集
    		nameRs = RecordStore.openRecordStore("name", true);
    		scoreRs = RecordStore.openRecordStore("score", true);
    		
    		try
    		{
    		    rsNum = nameRs.getNumRecords();
    		}
    		catch(RecordStoreNotOpenException e)
    		{
    			rsNum = 0;
    		}
            //记录数大于零
    		if ( rsNum > 0 )
    		{   
    			//记录数小于5
                if ( rsNum < 5 )
                {
          			b = name.getBytes();
          			nameRs.addRecord( b, 0, b.length);
           			b = intToByte(score);
           			scoreRs.addRecord( b, 0, b.length);
                	for ( int i = rsNum; i > 0; i-- )
                	{
            		    if ( i > 1 && byteToInt(scoreRs.getRecord(i)) < score )
            		    {
            		    	b = nameRs.getRecord(i);
            		    	nameRs.setRecord( i+1, b, 0, b.length);
            		    	b = scoreRs.getRecord(i);
            		    	scoreRs.setRecord( i+1, b, 0, b.length);
            		    }
            		    else
            		    {
            		    	if ( i == rsNum )
            		    	{
            		    		break;
            		    	}
            		    	b = name.getBytes();
            		    	nameRs.setRecord( i, b, 0, b.length);
            		    	b = intToByte(score);
            		    	scoreRs.setRecord( i, b, 0, b.length);
            		    }
                	}
                }
                //记录集等于5
                else
                {
                	for ( int i = rsNum; i > 0; i-- )
                	{
            		    if ( i > 1 && byteToInt(scoreRs.getRecord(i)) < score )
            		    {
            		    	b = nameRs.getRecord(i+1);
            		    	nameRs.setRecord( i, b, 0, b.length);
            		    	b = scoreRs.getRecord(i+1);
            		    	scoreRs.setRecord( i, b, 0, b.length);
            		    }
            		    else
            		    {
            		    	if ( i == rsNum )
            		    	{
            		    		break;
            		    	}
            		    	b = name.getBytes();
            		    	nameRs.setRecord( i, b, 0, b.length);
            		    	b = intToByte(score);
            		    	scoreRs.setRecord( i, b, 0, b.length);
            		    }
                	}
                }
    		}
    		else
    		{
    			b = name.getBytes();
    			nameRs.addRecord( b, 0, b.length);
    			b = intToByte(score);
    			scoreRs.addRecord( b, 0, b.length);
    		}
    		
    		//关闭记录集
    		nameRs.closeRecordStore();
            scoreRs.closeRecordStore();
        	nameRs = null;
        	scoreRs = null;  
    	}
    	catch(Exception e)
    	{
    		
    	}
    	
    }
	
    /**
     * 取高分记录
     * */
    public static int getHighScore(String name[], int score[])
    {
    	RecordStore nameRs = null;
    	RecordStore scoreRs = null;
    	int rsNum = 0;
    	try
    	{
            //打开记录集
    		nameRs = RecordStore.openRecordStore("name", false);
    		scoreRs = RecordStore.openRecordStore("score", false);
    		
    		try
    		{
    		    rsNum = nameRs.getNumRecords();
    		}
    		catch(RecordStoreNotOpenException e)
    		{
    			rsNum = 0;
    		}
    		
    		for ( int i = 0; i < rsNum; i++ )
    		{
    			name[i] = new String(nameRs.getRecord(i+1));
    			score[i] = byteToInt(scoreRs.getRecord(i+1));
    		}
    		
    		//关闭记录集
    		nameRs.closeRecordStore();
            scoreRs.closeRecordStore();
        	nameRs = null;
        	scoreRs = null;
    	}
    	catch(Exception e)
    	{
    		System.out.println(e);
    	}

		return rsNum;
    }
    
    /**
     * 将整数转换为字节数组
     * @param number 要转换的整数
     * @return 字节数组
     * */
    public static byte[] intToByte(int number)
    {
    	return String.valueOf(number).getBytes();
    }
    
    /**
     * 将字节数组转换为整数
     * @param number 要转换的字节数组
     * @return 整数
     * */
    public static int byteToInt(byte[] bytes)
    {
    	return Integer.parseInt(new String(bytes));
    }
    
    public boolean moveArrayElement(int data[], int from, int to)
    {
    	if ( to > data.length )
    	{
    		return false;
    	}
    	else
    	{
    		data[to] = data[from];
    	}
    	return true;
    }
}