How To Generate A Random String Alphabet And Number in Java Android

The following java code below used to generate random string in java android. This function can use Alphabet or number format as string. Random string can be helpful when need to runing unit test.

   public static String getRandomString(int length) {  
     StringBuilder result = new StringBuilder();  
     String characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";  
     Random rand = new Random();  
     while(length > 0) {  
       String h = String.valueOf(characters.charAt(rand.nextInt(characters.length())));  
       result.append(h);  
       length--;  
     }  
     return result.toString();  
   }