Change the PigLatinTranslator class so that the translate method is static. Chan

Question

Change the PigLatinTranslator class so that the translate method is static. Change the PigLatin class so it invokes the method correctly. Please explain how to do it too. PigLatinTranslator.java: public class PigLatinTranslator { // Translates a sentence of words into Pig Latin using String // methods toLowerCase and split // Note: split not in the AP subset! public String translate(String sentence) { String result = ""; sentence = sentence.toLowerCase(); String[] holdPieces = sentence.split("\s"); for(int i = 0; i < holdPieces.length; i++) { result += translateWord(holdPieces[i]); result += " "; } return result; } /** The following methods are declared private. They are not accessed * by client outside the class. They only to help the translate * method. They cannot be called outside of this class. */ // Translates one word into Pig Latin. If the word begins with a vowel, // the suffix "yay" is appened to the word. Otherwise, the first letter // or two are moved to the end of the word, and ay is appended. private 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.substring(0,1) + "ay"; return result; } // Determines if the specified word begins with a vowel private boolean beginsWithVowel(String word) { String vowels = "aeiou"; String letter = word.substring(0, 1); return (vowels.indexOf(letter) != -1); } // Determines if the specified word begins with a particular // two-character consonant blend // Uses the String method startsWith // Note: startsWith not in the AP subset! private 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")); } } PigLatin.java: // Driver to exercise the PigLatinTranslator class import java.util.Scanner; public class PigLatin { // Reads sentences and translates them into Pig Latin public static void main(String[] args) { String sentence, result, another = "y"; Scanner input = new Scanner(System.in); PigLatinTranslator translator = new PigLatinTranslator(); while(another.equalsIgnoreCase("y")) { System.out.println(); System.out.print("Enter a sentence (no punctuation): "); sentence = input.nextLine(); System.out.println(); result = translator.translate(sentence); System.out.print("That sentence in Pig Latin is: "); System.out.println(result); System.out.println(); System.out.print("Translate another sentence? (y/n) "); another = input.nextLine(); } } }

Explanation / Answer

Make translate() static, which requires making all helper methods for translate() static. Then in main(), there is no need to create an instance of PigLatinTranslator.

public class PigLatinTranslator
{
    // Translates a sentence of words into Pig Latin using String
    // methods toLowerCase and split
    // Note: split not in the AP subset!
    public static String translate(String sentence)
    {
        String result = "";
        sentence = sentence.toLowerCase();
        String[] holdPieces = sentence.split("\s");
        for(int i = 0; i < holdPieces.length; i++)
        {
            result += translateWord(holdPieces[i]);
            result += " ";
        }
        return result;
    }
    /** The following methods are declared private. They are not accessed
    * by client outside the class. They only to help the translate
    * method. They cannot be called outside of this class.
    */
    // Translates one word into Pig Latin. If the word begins with a vowel,
    // the suffix "yay" is appened to the word. Otherwise, the first letter
    // or two are moved to the end of the word, and ay is appended.
    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.substring(0,1) + "ay";
        return result;
    }
    // Determines if the specified word begins with a vowel
    private static boolean beginsWithVowel(String word)
    {
        String vowels = "aeiou";
        String letter = word.substring(0, 1);
        return (vowels.indexOf(letter) != -1);
    }
    // Determines if the specified word begins with a particular
    // two-character consonant blend
    // Uses the String method startsWith
    // Note: startsWith not in the AP subset!
    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"));
    }
}
// Driver to exercise the PigLatinTranslator class
import java.util.Scanner;
public class PigLatin
{
    // Reads sentences and translates them into Pig Latin
    public static void main(String[] args)
    {
        String sentence, result, another = "y";
        Scanner input = new Scanner(System.in);
       
        while(another.equalsIgnoreCase("y"))
        {
            System.out.println();
            System.out.print("Enter a sentence (no punctuation): ");
            sentence = input.nextLine();
            System.out.println();
            result = PigLatinTranslator.translate(sentence);
            System.out.print("That sentence in Pig Latin is: ");
            System.out.println(result);
            System.out.println();
            System.out.print("Translate another sentence? (y/n) ");
            another = input.nextLine();
        }
    }
}

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