Question

this was the solution to my homework and the purpose was to reverse each word in a string based on user inputting a sentence. I have completed this on my own, but I’m just wondering how the iterator worked in this piece of code. I don’t understand the delcaration of tempword = “”; and how he printed out each word delimited by spaces.

import java.util.Scanner;

public class StringReverser
{
    public static void main(String args[])
    {
        String sentence;
        String word;
        String tempWord = "";

        Scanner scan = new Scanner(System.in);
        Scanner wordScan;

        System.out.print("Enter a sentence: ");
        sentence = scan.nextLine();

        wordScan = new Scanner(sentence);

        while(wordScan.hasNext())
        {
            word = wordScan.next();

            for(int numLetters = word.length() - 1; numLetters >= 0; numLetters--)
                tempWord += word.charAt(numLetters);

            System.out.print(tempWord + " ");
            tempWord = "";
        }
        System.out.println();
    }
}

Answer 1

this bit adds in the spaces

System.out.print(tempWord + " ");

this bit reverses it

for(int numLetters = word.length() - 1; numLetters >= 0; numLetters--)
            tempWord += word.charAt(numLetters);

this bit sets it up for the next word

tempWord = "";