RandomAccessFileDemo

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package test;import java.io.File;import java.io.FileNotFoundException;import java.io.IOException;import java.io.RandomAccessFile;public class <span style="font-family: Arial, Helvetica, sans-serif;">RandomAccessFile</span><span style="font-family: Arial, Helvetica, sans-serif;">Demo{</span>public static void main(String args[]) throws IOException{File f = new File("d:"+File.separator+"text.txt") ;// 实例化File类的对象RandomAccessFile raf=new RandomAccessFile(f,"rw");raf.writeBytes("zhangsan");raf.close();read();}public static void read() throws IOException{File f = new File("d:"+File.separator+"text.txt") ;// 实例化File类的对象RandomAccessFile raf=new RandomAccessFile(f,"r");byte b1=raf.readByte();System.out.println("b:"+b1);raf.skipBytes(5);byte b2=raf.readByte();System.out.println("b:"+b2);raf.seek(3);byte b3=raf.readByte();System.out.println("b:"+b3);System.out.println("b:"+(new String(new byte[]{b1,b2,b3})));raf.close();}};/**b:122b:97b:110b:zan**/

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