Java read and write files sample

package test;import java.io.bufferedreader;import java.io.bufferedwriter;import  java.io.filereader;import java.io.filewriter;import java.io.ioexception;import  Java.io.randomaccessfile;public class file { public static void main (String [] args]  {  try{  //system.out.println (Bufferedreadertest ());// Bufferedwritertest ("Hello,world");   //appendmethoda ("1.txt", "Hello");   //appendmethodb ("1. TXT "," hello ");   }catch (exception e)   {   e.printstacktrace ();   } } public static string bufferedreadertest ()  throws ioexception{   filereader fr=new filereader ("1.txt");  bufferedreader br=new  BufferedReader (FR);   string s= "";   string a=br.readline ();   while (a!= NULL)   {   s=s+a;   a=br.reAdline ();   }  br.close ();   fr.close ();  return s;     } public static void bufferedwritertest (string s)  throws  Ioexception{  filewriter fw=new filewriter ("1.txt");           bufferedwriter bw=new bufferedwriter (FW);         bw.write (s);         bw.close ();         fw.close ();     }  public static void  appendmethodb (string filename, string content)  {          try {             // Open a write file, the second parameter in the constructor true indicates that the file is written in append form                    &nbsP;           filewriter writer = new  filewriter (filename, true);              writer.write (content);              Writer.close ();         } catch  (IOException e)  {             e.printstacktrace ();          }     }  public  Static void appendmethoda (string filename, string content)  {          try {              //  open a random Access file stream, read/write                                        randomaccessfile randomfile = new randomaccessfile (fileName,  "RW");              //  file length, number of bytes                              long filelength = randomfile.length ();              //moves the write file pointer to the end of the file.                            randomfile.seek (filelength);              randomfile.writebytes (content);              randomfile.clOSE ();         } catch  (ioexception e)  {              e.printstacktrace ();          }     }}

Java read-write file sample