Question about StringBuilder?

[nickliutw]

I'm currently working on a program which is pig Latin. It allows a user enter a sentence. The program would take the user input and change every word in to pig latin which it takes the first character of a word and add it to end of word with "ay". For instance, bog would be "ogday" This is what I have been done so far

import java.util.Scanner;

public class PigLatinTest
{
	public static void main(String[] args)
	{
		Scanner kybd = new Scanner(System.in);
		System.out.println("Please enter a sentence?");
		String enSentence = kybd.nextLine();
		
		//StringBuilder buffer = new StringBuilder(enSentence);
		
	}
		
	public static String convertToLatin(String s)
	{
		StringBuilder buffer = new StringBuilder();
		
		String [] sentence = s.split("");
		
		String k ="ay";
		
		for (String i:sentence)
		{
			buffer.insert(buffer.lastIndexOf(i), buffer.charAt(0));
			buffer.insert(buffer.lastIndexOf(i), k);
			buffer.delete(0,2);
		}		
		
	}
}

I wonder whether I did my convertToLatin correct or not? My other question is after the for loop loop each word, will the data in sentence array change? Or do I need to store the change into other array in order to access the change data?
Thank you so much.

[JamesCherrill]

I wonder whether I did my convertToLatin correct or not?

Well, did you test it? What was the result?

[nickliutw]

No, it won't work. Can you provide some hints or similar examples that would help me to create the method to convert English into pig latin? This is what I have so far. For your information, I test the code already. it won't work. I have been trying for several hours.

import java.util.Scanner;

public class PigLatinTest
{
	public static void main(String[] args)
	{
		Scanner kybd = new Scanner(System.in);
		System.out.println("Please enter a sentence?");
		String enSentence = kybd.nextLine();
		
		String r = convertToLatin(enSentence );
		System.out.println(r);
	}
		
	public static String convertToLatin(String s)
	{
		
		String [] sentence = s.split("");
		StringBuilder buffer = new StringBuilder(sentence.toString() );

		
		String k ="ay";
		int i =0;
		
		for (i:buffer.charAt(i))
		{
			if(1>=i.length())
			
				return i;
			
			else
			{
				buffer.insert(buffer.lastIndexOf(i), buffer.charAt(0));
				buffer.insert(buffer.lastIndexOf(i), k);
				buffer.delete(0,2);
			}
			
			
			
		}	
		return buffer.toString();
		
	}
}

[nickliutw]

I'm not sure how to edit it. But I think I need to rework my logic a bit. Can you provide some clues or hints? My thought so far is I need to use the split method in string class(that is what the specification say) to slip every word in a sentence and store into a array. Then use the stringbuilder to change the characters orders. Then return the string. In my main method I can just call the method and convert it and print it.

[nickliutw]

Okay. I'm running to compiler error say that it cannot find symbol, but I already define and initialize.

import java.util.Scanner;
public class TestProgram
{

	public static void main(String[] args)
	{
    //Using the scanner input
	 
    Scanner input = new Scanner(System.in);
    System.out.println("\nType a sentence in English: ");
    String english = input.nextLine();
	
	String [] sentence = english.split(" ");
		
		String k;
		
		for (int b=0; b < sentence.length; b++)
		
			 k = new StringBuilder().append(sentence[b]).append("").toString();
			
				for (int p=0; p< k.length(); p++)
				
					k.insert(k.lastIndexOf(p), k.charAt(0));
					k.insert(k.lastIndexOf(p), k);
					k.delete(0,2);

				
		
		
		
	
    //String Str = pigLatin(english);
    //System.out.println(Str);
	}
}

The compiler mark at k.insert() and say cannot find symbol k. But I already define k and initialize above the for loop. Why it is marking it wrong?

[JamesCherrill]

k is defined as a String. There is no insert method in the String class.

[nickliutw]

Thanks now I have everything working now.