Question

In Java, create a list that represents a sentence. Then:

1. Write a method that counts and returns the number of punctuation in a given sentence. Express this as a higher-order function and implement it.

2. Write a method that counts and returns the number of words in the sentence that have the letter ’z’ in them. Express this as a higher-order function and implement it.

Answer 1

Please find below code also added main function for testing
//Program.java

public class Program {
  
    public static int countPunctuation(String[] list) {
        int count = 0;
        // looping through list of words
        for (String word : list) {
            // looping through the each char of word
            for (int i = 0; i < word.length(); i++) {
                char c = word.charAt(i);
                // if char is whitespace or letter or alphabets
                if (Character.isWhitespace(c) || Character.isLetterOrDigit(c) || Character.isSpaceChar(c))
                    continue;
                // if punctuation increasing the count
                count++;
            }
        }
        // returning count
        return count;
    }

    public static int countZ(String list[]) {
        int count = 0;
        // looping through words
        for (String word : list) {
            // if z in words increasing the count
            if (word.contains("z")) count++;
        }
        return count;
    }

    public static void main(String[] args) {
        String list[] = {"this", "is", "a ", "list's", "of, words!"};
        System.out.println("Count of punctuation in \"this\", \"is\", \"a \" , \"list's\", \"of, words!\": " + countPunctuation(list));
        String list2[] = {"zoom", "the", "scene", "of", "zebra."};
        System.out.println("Count of 'z' in \"zoom\", \"the\",\"scene\",\"of\",\"zebra.\" in: " + countZ(list2));
    }
}

//OUTPUT

"a" "the"."scene"."of". "zebra." in: 2 Count of punctuation in "this" Count of 'z' in "zoom" "of, words!": 3 "is" "list's",

Please do let me know if u have any concern...