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GeezerVison is showing github.com — hackerrank-java/src/JavaAnagrams.java at master · anishLearnsToCode/hackerrank-java

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JavaAnagrams.java

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// https://www.hackerrank.com/challenges/java-anagrams/problem
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
public class JavaAnagrams {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String a = scanner.nextLine();
String b = scanner.nextLine();
if (isAnagram(a, b)) {
System.out.println("Anagrams");
} else {
System.out.println("Not Anagrams");
}
}
private static boolean isAnagram(String a, String b) {
int[] aCharacterFrequencies = getCharacterFrequencies(a);
int[] bCharacterFrequencies = getCharacterFrequencies(b);
return areEqual(aCharacterFrequencies, bCharacterFrequencies);
}
private static int[] getCharacterFrequencies(String string) {
int[] result = new int[26];
string = string.toLowerCase();
for (int index = 0 ; index < string.length() ; index++) {
result[string.charAt(index) - 97]++;
}
return result;
}
private static boolean areEqual(int[] a, int[] b) {
for (int index = 0 ; index < a.length ; index++) {
if (a[index] != b[index]) {
return false;
}
}
return true;
}
private static boolean areAnagrams(String a, String b) {
Map<Character, Integer> aCharacterFrequencies = getFrequencies(a);
Map<Character, Integer> bCharacterFrequencies = getFrequencies(b);
return aCharacterFrequencies.equals(bCharacterFrequencies);
}
private static Map<Character, Integer> getFrequencies(String string) {
Map<Character, Integer> frequencies = new HashMap<>();
string = string.toLowerCase();
for (int index = 0 ; index < string.length() ; index++) {
char character = string.charAt(index);
frequencies.put(character, frequencies.getOrDefault(character, 0) + 1);
}
return frequencies;
}
}
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