Question

How to create an ASCII frequency table from a string in Java

Answer 1

import java.util.HashMap;
import java.util.Map;

public class ASCIIFrequency {
    public static Map<Character, Integer> getASCIIFrequency(String str) {
        Map<Character, Integer> frequencyTable = new HashMap<>();
        
        for (char c : str.toCharArray()) {
            frequencyTable.put(c, frequencyTable.getOrDefault(c, 0) + 1);
        }
        
        return frequencyTable;
    }

    public static void main(String[] args) {
        String input = "java c c++ c# rust python php";
        
        Map<Character, Integer> frequencyTable = getASCIIFrequency(input);
        
        System.out.println(frequencyTable);
    }
}



/*
run:

{ =6, a=2, c=3, #=1, h=2, j=1, +=2, n=1, o=1, p=3, r=1, s=1, t=2, u=1, v=1, y=1}

*/

 

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