Anagrams Check with Array

Anagrams.java

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static boolean isAnagram(String str1, String str2){

	// not the same size its not anagram
	if(str1.length() != str2.length()) return false;

	// integer array of 26 for each letter of English alphabet
	int[] letters = new int[26];

	// check characters of first String against decimal ASCII value of letter "a"
	for(char c : str1.toCharArray()){
		letters[c - 'a']++;
	}

	// check characters of second String against decimal ASCII value of letter "a"
	for(char c : str2.toCharArray()){
		letters[c - 'a']--;
	}

	// check letters array values if any letter exists in only one of the two Strings
	for(int i : letters){
		if(Math.abs(i) > 0) return false;
	}

	// is anagram
	return true;
}

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