Check two String is Anagram or not

CheckAnagramString.java

import java.util.Arrays;

public class CheckAnagramString {
    
	public static void main(String[] args) {
    
		String str1 = "beetechmantra";
		String str2 = "mantrabeetech";
		
		boolean anagram = isStringAnagram(str1, str2);
		System.out.println("Is Anagram : " + anagram);
	}
	
	public static boolean isStringAnagram(String str1, String str2) {
	    if(str1 == "" || str2 == "" || str1.length() != str2.length()) {
	        return false;
	    }
	    
	    char []charArray1 = str1.toCharArray();
	    char []charArray2 = str2.toCharArray();
	    
	    Arrays.sort(charArray1);
	    Arrays.sort(charArray2);
	    
	    for(int i=0; i<str1.length(); i++) {
	        if(charArray1[i] != charArray2[i])
	            return false;
	    }
	    return true;
	}
}