Find two strings are anagram in Java ?

Source Code :

 import java.util.Arrays;  
 /**  
  * Anagram.java   
  * @author Shashwat Anand  
  */  
  public class Anagram {  
      public static void main(String[] args) {  
           System.out.println(testAnagram("Shashwat", "Shawatsh"));  
           System.out.println(testAnagram("Shashwat", "Shawatwh"));  
           System.out.println(testAnagramWithInbuiltMethods("Shashwat", "Shawatsh"));  
           System.out.println(testAnagramWithInbuiltMethods("Shashwat", "Shawatwh"));  
      }  
      private static boolean testAnagramWithInbuiltMethods(String str1, String str2) {  
           char[] charArray1 = str1.toCharArray();  
           char[] charArray2 = str2.toCharArray();  
           Arrays.sort(charArray1);  
           Arrays.sort(charArray2);  
           return Arrays.equals(charArray1, charArray2);  
      }  
      private static boolean testAnagram(String str1, String str2) {  
           if (str1.length() != str2.length()) {  
                return false;  
           }  
           char[] charArray = str1.toCharArray();  
           for (char ch : charArray) {  
                int index = str2.indexOf(ch);  
                if (index != -1) {  
                     str2 = str2.substring(0, index) + str2.substring(index + 1, str2.length());  
                } else {  
                     return false;  
                }  
           }  
           return str2.isEmpty();  
      }  
  }