[CSC 204] Reading Words from a Text File

[Andrew J. Pounds]

Several of you have asked me for help with reading words from a text 
file.  Assuming that you have "in" tied to an input file, the following 
should read "words" and print them out to the screen.  The basic idea is 
that you read in a string, strip off everything to the first space and 
call that a word.  You then move the index to the next word in the 
string and keep repeating the procedure until you get to the end of the 
line.

You may have to do some further cleanup -- but I think you can handle that.


                while (in.hasNextLine()) {
                    String line = in.nextLine().trim();
                    index = line.indexOf(" ");
                    while ( index != -1 ) {  // This assures we are not at the last word
                        String word = line.substring(0,line.indexOf(" ")); // Strip off the word
                        System.out.println(word);
                        // Now make the line to be searched smaller
                        line = line.substring(line.indexOf(" ")+1,line.length()).trim();
                        index = line.indexOf(" ");
                    }
                    // At this point we have reached the last word in the line
                    String word = line.substring(0,line.length());
                    System.out.println(word);
                    index = 0;
                }


-- 
Andrew J. Pounds, Ph.D.  (pounds at theochem.mercer.edu)
Associate Professor of Chemistry and Computer Science
Mercer University,  Macon, GA 31207   (478) 301-5627