import java.io.*;
public class ran
{
public static void main(String args[])
{
try
{
File f = new File("aa.txt");
f.createNewFile();
java.io.RandomAccessFile raf = new java.io.RandomAccessFile(f,"rw");
raf.writeUTF("我是sdfsdfs呵呵");
raf.close();
}
catch (Exception e)
{
System.out.println(e);
}