randemo.java

来自「苏州大学java学习的ppt课件」· Java 代码 · 共 27 行

//打开一个存有abcde的文件，读出e来
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! ");
		}

	}
}