How to check null on StringBuilder?

Question

I want to check for null or empty specifically in my code. Does empty and null are same for StringBuilder in Java?

For example:

StringBuilde         


        

Answer 1

The below code may help you,

StringBuffer sb = new StringBuffer();
String str = sb.toString();
if(!"".equals(str)) {
    System.out.println("String : " + str);
} else {
    System.out.println("Empty Builder");
}