Thread: PigLatinTranslator produces no output

This program is supposed to read a sentence of user input and translate it to piglatin by appending "yay" to a word beginning with a vowell and for words beginning with consonants or consonant blends ("br", "tw", "st" etc..) moving the consonant/blend to the end then adding an "ay". My version of the program does not produce any output. But it does prompt me to type in a sentence (which is in the do loop of my main method). Any help, please

main:

//PigLatin.java
 
import java.util.Scanner;
 
public class PigLatin
{
  public static void main (String[] args)
  {
    String sentence, result, another;
 
    Scanner scan = new Scanner (System.in);
 
    do
    {
      System.out.println ();
      System.out.println ("Enter a sentence (no punctuation):");
      sentence = scan.nextLine();
 
      System.out.println ();
      result = PigLatinTranslator.translate (sentence);
      System.out.println ("That sentence in Pig Latin is:");
      System.out.println (result);
 
      System.out.println();
      System.out.print ("Translate another sentence (y/n)?");
      another = scan.nextLine();
    }
    while (another.equalsIgnoreCase("y"));
  }
}

And the called method:

//PigLatinTranslator.java
 
import java.util.Scanner;
 
public class PigLatinTranslator
{
  //translates a sentence of words into piglatin
  public static String translate (String sentence)
  {
    String result = "";
 
    sentence = sentence.toLowerCase();
 
    Scanner scan = new Scanner (sentence);
 
    while (scan.hasNext());
    {
      result += translateWord (scan.next());
      result += " ";
    }
 
  return result;
  }
 
  //translates ONE word into piglatin. Using the language rules of
  //that language.
  private static String translateWord (String word)
  {
    String result = "";
 
    if (beginsWithVowel (word))
        result = word + "yay";
    else
        if (beginsWithBlend (word))
            result = word.substring(2) + word.substring(0,2) + "ay";
        else
            result = word.substring(1) + word.charAt(0) + "ay";
 
    return result;
  }
 
  //Finds out if the word begins with a vowell
  private static boolean beginsWithVowel (String word)
  {
    String vowels = "aeiou";
 
    char letter = word.charAt(0);
 
    return (vowels.indexOf (letter) != -1);
  }
 
  //Finds out if the word begins with any of the two character
  //consonant blends
  private static boolean beginsWithBlend (String word)
  {
    return ( word.startsWith ("bl") || word.startsWith ("sc") || 
             word.startsWith ("br") || word.startsWith ("sh") || 
             word.startsWith ("ch") || word.startsWith ("sk") || 
             word.startsWith ("cl") || word.startsWith ("sl") ||
             word.startsWith ("cr") || word.startsWith ("sn") ||
             word.startsWith ("dr") || word.startsWith ("sm") ||
             word.startsWith ("dw") || word.startsWith ("sp") ||
             word.startsWith ("fl") || word.startsWith ("sq") ||
             word.startsWith ("fr") || word.startsWith ("st") ||
             word.startsWith ("gl") || word.startsWith ("sw") ||
             word.startsWith ("gr") || word.startsWith ("th") ||
             word.startsWith ("kl") || word.startsWith ("tr") ||
             word.startsWith ("ph") || word.startsWith ("tw") ||
             word.startsWith ("pl") || word.startsWith ("wh") ||
             word.startsWith ("pr") || word.startsWith ("wr") );
  }
}

Hi Norm. Well after much experimenting I changed to translate(sentence); in the main method to translateWord(sentence); sort of bypassing the translate method entirely. I changed translateWord to public and ran it and now if works finally yaay! But because .toLowerCase(); is in the bypassed method it all prints out with the capitals now and it doesnt process a sentence one word at a time, just considers it to be one whole word. Heres an example of what its doing:

craig@craig-laptop:~/Documents/panda/java3$ java PigLatin
 
Enter a sentence (no punctuation):
No I wont enter a sentence
 
That sentence in Pig Latin is:
o I wont enter a sentenceNay
 
Translate another sentence (y/n)?y
 
Enter a sentence (no punctuation):
Oh fine I'll keep entering sentences then.
 
That sentence in Pig Latin is:
h fine I'll keep entering sentences then.Oay
 
Translate another sentence (y/n)?

I'm going to keep trying this one, but if you have a tip for me that would be great..

The reason for this is because the method you bypassed doesn't just set the sentence to lower case letters it also does something else. Do as Norm mentioned and put some System.out.println() calls throughout your methods. In this manner you can narrow down where the code is doing behavior you don't want.

craig@craig-laptop:~$ cd Documents/panda/java3
craig@craig-laptop:~/Documents/panda/java3$ javac PigLatinTranslator.java
craig@craig-laptop:~/Documents/panda/java3$ javac PigLatin.java
craig@craig-laptop:~/Documents/panda/java3$ java PigLatin
 
Enter a sentence (no punctuation):
Ok then fine I will enter a sentence
 
That sentence in Pig Latin is:
okyay enthay inefay iyay illway enteryay ayay entencesay 
okyay enthay inefay iyay illway enteryay ayay entencesay yay
false
true
 
Translate another sentence (y/n)?n
craig@craig-laptop:~/Documents/panda/java3$

Thanks for the help guys. I have found there was a semicolon here in my code: while (scan.hasNext()); which I got rid of and it worked. Debugging tip really worked well I will be using that alot now

//PigLatin.java
 
import java.util.Scanner;
 
public class PigLatin
{
  public static void main (String[] args)
  {
    String sentence, result, another;
 
    Scanner scan = new Scanner (System.in);
 
    do
    {
      System.out.println ();
      System.out.println ("Enter a sentence (no punctuation):");
      sentence = scan.nextLine();
 
      System.out.println ();
      result = PigLatinTranslator.translate (sentence);
      System.out.println ("That sentence in Pig Latin is:");
      System.out.println (result);
 
      System.out.println (PigLatinTranslator.translateWord (result));
      System.out.println (PigLatinTranslator.beginsWithBlend (result));
      System.out.println (PigLatinTranslator.beginsWithVowel (result));
 
      System.out.println();
      System.out.print ("Translate another sentence (y/n)?");
      another = scan.nextLine();
    }
    while (another.equalsIgnoreCase("y"));
 
  }
}