//打開一個存有abcde的文件，讀出e來
import java.io.*;
class  RanDemo 
{
	public static void main(String[] args) 
	{
		try{

		RandomAccessFile ra  = new RandomAccessFile("ra.txt","r");
		ra.seek(4);
		char ch =(char) ra.readByte();

		System.out.println("Hello  "+ch);
		ra.close();
		}catch(FileNotFoundException e1)
		{ System.err.println("file not found!");
		}
		catch(IOException e2)
		{
		System.err.println("seek failed! ");
		}

	}
}