b0fc0928fd68001c1062ba55e86abf57

这是我自己照着书上敲的

/*
 * Created on 2007-9-22
 *
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 */
import java.io.*;
/**
 * @author Administrator
 *
 * TODO To change the template for this generated type comment go to
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 */
public class RWMemory 
{
	public static void main(String args[])
	{
		byte b[]={65,66,67,68,69,70,71,72,73,74};
		try
		{
			ByteArrayInputStream bin=new ByteArrayInputStream(b[]);
			ByteArrayOutputStream bout=new ByteArrayOutputStream();
			int n=bin.avialable();
			bin.skip(n/2);
			int m;
			while((m=bin.read())!=-1)
			{
				bout.write(m);
			}
			System.out.println("read write half data"+bout);
			bin.reset();
			bout.reset();
			int k=b.length;
			byte rb[]=new byte[k];
			bin.read(rb[],0,10);
			bout.write(rb[],0,10);
			System.out.println("read write all data"+bout.toString());
		}
		catch(IOException e)
		{
			System.out.println("error"+e);			
		}		
	}

}