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Count.java

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// Java prorgam to count frequencies of

// characters in string using Hashmap

import java.io.*;

import java.util.*;

class Count{

static void characterCount(String inputString)

{

// Creating a HashMap containing char

// as a key and occurrences as a value

HashMap<Character, Integer> charCountMap

= new HashMap<Character, Integer>();

// Converting given string to char array

char[] strArray = inputString.toCharArray();

// checking each char of strArray

for (char c : strArray) {

if (charCountMap.containsKey(c)) {

// If char is present in charCountMap,

// incrementing it's count by 1

charCountMap.put(c, charCountMap.get(c) + 1);

}

else {

// If char is not present in charCountMap,

// putting this char to charCountMap with 1 as it's value

charCountMap.put(c, 1);

}

}

// Printing the charCountMap

for (Map.Entry entry : charCountMap.entrySet()) {

System.out.println(entry.getKey() + " " + entry.getValue());

}

}

// Driver Code

public static void main(String[] args)

{ Scanner sc=new Scanner(System.in);

String str=sc.nextLine();;

characterCount(str);

}

}