position of the number

I had a notepad... which contains... 3489 numbers...
I can search for a particular number but I would like to know the position of that number in the notepad..

example file:
123, 1245, 124, 567, 678, 6787,56778,345,6786,234,89,897,4556,5890,456,890,489,6798...

all numbers are unique...

ok if i seach for 567 If I can find it then i can print it but i would lke to know the position of that number 567
here the position is 4

shragiAsked:
Who is Participating?

Improve company productivity with a Business Account.Sign Up

x
 
su_muConnect With a Mentor Commented:
Simple sample code using StringTokenizer:


public static void main(String[] args) {
            String findNo = "567";
            String input = "123, 1245, 124, 567, 678, 6787,56778,345,6786,234,89,897,4556,5890,456,890,489,6798";
            StringTokenizer tok = new StringTokenizer(input,",");
            int  i = 1;
            while(tok.hasMoreTokens()){
                  String temp = tok.nextToken().trim();
                  if(!(temp.equals(findNo))){
                        i++;
                        continue;
                  }
                  break;
            }
            System.out.println("The position of the number is "+i);
      }
0
 
Gurvinder Pal SinghCommented:
did you tried the indexOf(); method of String class?

I.e, when you have got the contents of the file in a string, you just need to do indexOf(<string to be searched>); , it should display the index of that number in that string

For getting file contents in string
http://snippets.dzone.com/posts/show/1335
http://www.kodejava.org/examples/52.html

0
 
kaushikdebCommented:
I guess you mean, you have a text file ('I had a notepad'!) and you are trying to do the operation you mentioned using java.
If that is the case, you can use the following steps to do this (may not be the best solution, but it should be enough and easy for a 'new to java programming' person :) ):
1. Read contents of the text file in java and get the whole data in a String.
2. Use the split function of String giving ',' (comma) as a separator. This function returns String array.
3. Now you can find the number you want and the index of the array for that number would be the position.

Hope this helps.
0
Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
Gurvinder Pal SinghCommented:
If you want to find the position of the number (assuming the numbers will be separated by comma), then after you have read the file into a string, split the string with commas to get the array of number.
see this link on how to get its index
http://www.java-forums.org/new-java/12254-direct-way-get-index-array.html
0
 
ksivananthCommented:
use Scanner, which is optimal than split... check this example, http://www.javapractices.com/topic/TopicAction.do?Id=42

you would use "," as delimite than "=" in the example!
0
 
Subrat (C++ windows/Linux)Software EngineerCommented:
//I can search for a particular number
How r u searching the no?
Send the code. It'll be easier to find out what problem ur facing to find the index...
0
 
shragiAuthor Commented:
@su_mu

this code works perfectly.... can you tell me how to search for multiple numbers...

search three numbers at a time...

0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.