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Prime Anagrams - Comparing Anagrams using Prime Numbers


Introduction

In this post, we will use prime numbers to compare anagrams. We will assign the prime number to each character in a string and then multiply them. Two strings will be equal if their product is the same.

Implementation in Java




public class PrimeAnagram {

 static int [] alphaPrime = {5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107};
 static String alphabets = "abcdefghijklmnopqrstuvwxyz";
 
 
 public static void main(String[] args) {
  System.out.println(isPrimeAnagram("parse", "spare"));
 }
 
 private static boolean isPrimeAnagram(String value1,String value2) {  
  return getPrime(value1) == getPrime(value2);
 }
 
 private static int getPrime(String value) {
  value = value.toLowerCase();
  
  int productValue = 1;
  
  for(int index = 0; index < value.length(); index++) {
   productValue *= alphaPrime[ alphabets.indexOf(value.charAt(index)) ];
  }
  
  return productValue;
 }
}

Conclusion

We have implemented the Prime Anagram using Java language. We have made it case insensitive by converting the value to lower case. Happy Learning :)

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