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Thread: Compare strings

  1. #1
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    Default Compare strings

    public class CompareString {
        public static void main(String[] args) {
     
     
            StringBuilder s1 = new StringBuilder("axx#bb#c");
            StringBuilder s2 = new StringBuilder("axbd#c#c");
     
            if (compareStrings(s1, s2))
                System.out.print("True");
            else
                System.out.print("False");
        }
     
        public static boolean compareStrings(StringBuilder s1, StringBuilder s2) {
            int countS1 = -1;
            int countS2 = -1;
     
     
            for (int i = 0; i < s1.length(); i++) {
     
     
                if (s1.charAt(i) == '#' && countS1 != -1)
                    countS1 -= 1;
     
     
                else if (s1.charAt(i) != '#') {
                    s1.setCharAt(countS1 + 1, s1.charAt(i));
                    countS1 += 1;
                }
            }
     
     
            for (int i = 0; i < s2.length(); i++) {
     
     
                if (s2.charAt(i) == '#' && countS2 != -1)
                    countS2 -= 1;
     
                else if (s2.charAt(i) != '#') {
                    s2.setCharAt(countS2 + 1, s2.charAt(i));
     
                    countS2 += 1;
                }
            }
            if (countS2 != countS1)
                return false;
     
     
            else if (countS1 == -1 && countS2 == -1)
                return true;
     
            else {
                for (int i = 0; i <= countS2; i++) {
                    if (s1.charAt(i) != s2.charAt(i))
                        return false;
                }
                return true;
     
     
            }
        }
    }

    The code works, but the teacher insisted that instead of the Boolean type there should be an int type, and that it would return not true or false, but 1 or 0

    public static int compareStrings(String s1, String s2)

    pls help )
    Last edited by amnez1ya; April 10th, 2022 at 04:21 AM.

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Compare strings

    Did you look at the String class to see if it has any methods that do what you want?

    Please edit your post and wrap your code with code tags:

    [code]
    **YOUR CODE GOES HERE**
    [/code]

    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  3. The Following User Says Thank You to Norm For This Useful Post:

    amnez1ya (April 7th, 2022)

  4. #3
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    Default Re: Compare strings

    I didn't quite understand your question...
    I can't figure out how to change this code so that it returns 1 and 0.

  5. #4
    Super Moderator Norm's Avatar
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    Default Re: Compare strings

    how to change this code so that it returns 1 and 0
    What are the conditions for the code to return a 0?
    What are the conditions for the code to return a 1?
    Given answers to those two questions, work on the code to do it.
    If you don't understand my answer, don't ignore it, ask a question.

  6. #5
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    Default Re: Compare strings

    Thanks for the thought, I'll take a look at it

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