Question

How to check if each letter in a string maps to the first letter of a word in another string with Java

Answer 1

public class PatternMatch {

    public static boolean matchesPattern(String pattern, String sentence) {
        String[] words = sentence.split("\\s+");

        // Length mismatch → automatic failure
        if (pattern.length() != words.length) {
            return false;
        }

        // Compare each pattern character to the first letter of each word
        for (int i = 0; i < pattern.length(); i++) {
            char p = Character.toLowerCase(pattern.charAt(i));
            char w = Character.toLowerCase(words[i].charAt(0));

            if (p != w) {
                return false;
            }
        }

        return true;
    }

    public static void main(String[] args) {
        String pattern = "jpcrg";
        String sentence = "java python c rust go";

        if (matchesPattern(pattern, sentence)) {
            System.out.println("Pattern matches!");
        } else {
            System.out.println("Pattern does NOT match.");
        }
    }
}



/*
run:

Pattern matches!

*/

 

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