Example: CharacterFrequencyTraditional in Java

// CharacterFrequencyTraditional
import java.util.HashMap;
import java.util.Map;

// Main class containing the entry point of the program
public class Main {
    public static void main(String[] args) {
        String inputString = "programming";
        Map<Character, Integer> charFrequencies = new HashMap<>();

        // Step 1: Iterate through each character of the string
        for (char ch : inputString.toCharArray()) {
            // Step 2: Use getOrDefault to increment the count
            // If the character is already in the map, get its current count and add 1.
            // If not, it means its first occurrence, so set count to 1.
            charFrequencies.put(ch, charFrequencies.getOrDefault(ch, 0) + 1);
        }

        // Step 3: Print the character frequencies
        System.out.println("Character frequencies (Traditional Method):");
        for (Map.Entry<Character, Integer> entry : charFrequencies.entrySet()) {
            System.out.println(entry.getKey() + ": " + entry.getValue());
        }
    }
}