randomwritestock.java

模拟股票交易市场设计的股票交易系统。采用软件工程思想设计

import java.io.*;
import java.lang.*;
public class RandomWriteStock{
    public static void main(String[] args)
    {
        double[] value=new double[90];
        for(int i=0;i<90;i++)
            value[i]=i*5.3632;
        try
        {
            RandomAccessFile rf=new RandomAccessFile("STOCK/统一超市.txt","rw");
            rf.seek(0);
            rf.writeInt(90);
            for(int i=0;i<90;i++)
            {
                rf.seek((i+1)*60);
                rf.writeDouble(value[i]);
            }
            rf.close();
        }
        catch(Exception e)
        {
        }
        /*
        try{
        RandomAccessFile r=new RandomAccessFile("麦当劳.txt","rw");
        for(int j=1;j<=90;j++)
        {
            r.seek(j*60);
            int i=r.readInt();
            System.out.println(i);
        }
        }
        catch(Exception e)
        {
        }
         */
    }
    
}