Difference between null and empty (“”) Java String

Question

What is the difference between null and the \"\" (empty string)?

I have written some simple code:

String a = \"\";
String b         


        

Answer 1

null means the name isn't referencing any instantiated object. "" means an empty string.

Here a is referencing some object which happens to be an empty string. b isn't referencing any object as it's null.