Problem 090 Making Anagram Find the difference between two strings in frequencies of usage

Author: jeanbou

HackerRank/Java/Problem_Solving/Problem090_MakingAnagram_FindTheDifferenceBetween2Strings.java

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+package hackerRank_JavaProblemSolving;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Scanner;
+
+public class Problem090_MakingAnagram_FindTheDifferenceBetween2Strings {
+ 
+ static final int NO_OF_CHARS = 27;
+
+ static HashMap<Character, Integer> hmS1 = new HashMap<Character, Integer>(NO_OF_CHARS);
+ static HashMap<Character, Integer> hmS2 = new HashMap<Character, Integer>(NO_OF_CHARS);
+ 
+ private static void initFrequencies(String S1, String S2) {
+ for (Character ch = 'a'; ch <= 'z'; ch++) { // initialization
+ hmS1.put(ch,0);
+ hmS2.put(ch,0);
+ }
+ for (int i = 0; i < S1.length(); i++) { // counting
+ Character ch = S1.charAt(i);
+ hmS1.put(ch,hmS1.get(ch)+1);
+ }
+ for (int i = 0; i < S2.length(); i++) { // counting
+ Character ch = S2.charAt(i);
+ hmS2.put(ch,hmS2.get(ch)+1);
+ }
+ } // initFrequencies
+
+ static int makingAnagrams(String s1, String s2) {
+ initFrequencies(s1,s2);
+ int sum = 0;
+ for (Character ch = 'a'; ch <= 'z'; ch++) { // initialization
+ sum += Math.abs(hmS1.get(ch)-hmS2.get(ch));
+ }
+ return sum;
+ }
+
+ private static final Scanner scanner = new Scanner(System.in);
+
+ public static void main(String[] args) throws IOException {
+ BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
+
+ String s1 = scanner.nextLine();
+
+ String s2 = scanner.nextLine();
+
+ int result = makingAnagrams(s1, s2);
+
+ bufferedWriter.write(String.valueOf(result));
+ bufferedWriter.newLine();
+
+ bufferedWriter.close();
+
+ scanner.close();
+ }
+}