Using Array & Loop in Java -

i want input file 0 data, 50 names , numbers. used looping , arrays hold names , numbers. think there's wrong array or loop statements.

import java.util.scanner; import java.io.fileinputstream; import java.io.filenotfoundexception;  import java.io.printwriter; import java.io.fileoutputstream;  public class studentparty   {     public static void main(string[] args)      {         string name1;         double number1;         string name2;         double number2;         string name3;         double number3;         double count = 3;         double total = 0;         double average;         string [] name = new string [50];         string [] number = new string [50];          scanner filein = null;         printwriter outputstream = null;          try         {             filein = new scanner                 (new fileinputstream                     ("studentpartyinput.txt"));             outputstream = new printwriter(new fileoutputstream                     ("studentpartyoutput.txt"));          }          catch (filenotfoundexception e)         {             system.out.println("file not foud.");             system.exit(0);         }          while (filein.hasnextline())                 {                     line = filein.nextline();                     count++;                     name1 = filein.nextline();                     number1 = filein.nextdouble();                     filein.nextline();                      total = total + number1;                 }          average = total / count;          filein.close();          outputstream.println();          outputstream.println(name1 + " had " + (number1 - average) + " more drinks average ");         outputstream.println(name2 + " had " + (number2 - average) + " more drinks average ");         outputstream.println(name3 + " had " + (number3 - average) + " more drinks average ");         outputstream.close();        }  } 

i assuming sample input looks pretty this

sample 1 120.00  sample 2 130.92 sample 3 140.34 

i have modified code.. in code have used many redundant variable's name1,number1 , ... have removed array declaration's .... try this

import java.io.fileinputstream; import java.io.filenotfoundexception; import java.io.fileoutputstream; import java.io.printwriter; import java.util.scanner;      public class studentparty       {         public static void main(string[] args)          {             double total = 0;             double average;             string [] name = new string [50];             double [] number = new double [50];              scanner filein = null;             printwriter outputstream = null;              try             {                 filein = new scanner                     (new fileinputstream                         ("studentpartyinput.txt"));                 outputstream = new printwriter(new fileoutputstream                         ("studentpartyoutput.txt"));              }              catch (filenotfoundexception e)             {                 system.out.println("file not found.");                 system.exit(0);             }              int cnt=0;             while (filein.hasnextline())                     {                         name[cnt]=filein.nextline();                         number[cnt] = double.valueof(filein.next());                         total = total + number[cnt];                         cnt++;                         if(filein.hasnextline()) filein.nextline();                     }              average = total / (double)cnt;              filein.close();             outputstream.println();              outputstream.println(name[0] + " had " + (number[0] - average) + " more drinks average ");             outputstream.println(name[1] + " had " + (number[1] - average) + " more drinks average ");             outputstream.println(name[2] + " had " + (number[2] - average) + " more drinks average ");             outputstream.close();            }      } 

sample o/p expected is

sample 1 had -10.419999999999987 more drinks average  sample 2 had 0.5 more drinks average  sample 3 had 9.920000000000016 more drinks average