Reading a tab delimited file and extracting a substring

Question

hi all,
i have a text file which is tab delimited,which contains keys and values.like the first 3 lines are keys which are like 50 keys(1-50).The remaining lines contains values..so that when it is is opened in excel sheet each value gets mapped to its key.My problem is i have to extract a substring between the two keys from the text file...for eg. between
(10-11)..does anyone know how to do it.if so please post it.
thanks

Answer 1

I'm not sure what your question is. The API docs for String.substring(int, int) are fairly straightforward. You will call String.indexOf(String) to find your delimiter. If you only want the portion after the delimiter, then call String.substring(posDelimiter + 1) and you are done. If you want the portion before the delimiter, then call String.substring(0, posDelimiter). If you want a portion between two delimiters, then call String.indexOf() again, and then call String.substring(startDelimiter + 1, endDelimiter);
     static final public void main(final String[] args) {
          String test = "Hello World=Java Program";
          // Portion before a delimiter (=)
          int posDelimiter = test.indexOf("=");
          System.out.println(test.substring(0, posDelimiter));
          // Portion after a delimiter (=)
          System.out.println(test.substring(posDelimiter + 1));
          // Portion between two delimiters (space)
          int posStart = test.indexOf(" ");
          int posFinish = test.indexOf(" ", posStart + 1);
          System.out.println(test.substring(posStart + 1, posFinish));
     }- Saish