File read write program output not coming correct

Question

this code is compiling without issues but the output is not what i am expecting .. the contents of delta.txt are as follows
*4014254420*
*2897449776*
*4207405601*
and the output thats coming is
[phone]+
+40142544204207405601+
[phone]+
its not reading the 2nd line somehow
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.*;
import java.io.FileWriter;
import javax.swing.*;
import java.util.Scanner;
public class testloop
          static int i;                                             
           static char c;                                               
           static int j = 1;     
                static String filename;                                                  
  public static void main(String[] args)  throws IOException 
try {
     FileReader fmi = new FileReader("delta.txt");
     FileWriter fmo = new FileWriter("Updated.txt");
     BufferedReader br = new BufferedReader(fmi);
               String temp=null;
                    do{
                    temp = br.readLine();
                    if(temp.startsWith("*"))
                         String tempc = temp.substring(1);                         
                         System.out.print(tempc+"\n");
                        long tp = Long.valueOf(tempc);
                         System.out.print(tp);                    
               else
               fmo.write(temp);
                    }while((temp=br.readLine()) != null);
               fmi.close();
               fmo.close();
               }catch (FileNotFoundException e){ System.out.print("not found");     }
               catch (IOException e){System.out.print("io"+e);
               e.printStackTrace();
    also if i use the following delta.txt
**4014254420*
**2897449776*
**4207405601*
mmm+
i get the output as
[phone]+
+40142544204207405601+
[phone]Exception in thread "main" java.lang.NullPointerException+
at testloop.main(testloop.java:33)*
its not writing the text to the file updated.txt
Edited by: adhiraj on Nov 27, 2007 6:58 AM

Answer 1

You are getting the next line twice.
do{
                    temp = br.readLine();
                    if(temp.startsWith("*"))
                         String tempc = temp.substring(1);                         
                         System.out.print(tempc+"\n");
                        long tp = Long.valueOf(tempc);
                         System.out.print(tp);                    
               else
               fmo.write(temp);
                    }while((temp=br.readLine()) != null);You need to change your code around so that you only call
temp=br.readLine();once per iteration of the loop.