Diff. between null & ""

[Akhil Gupta]

Can some body please tell me difference between
String s = "" and
String s1 = null;
I think a object is made in first case and not in second case, but then what is the value contained in first case, also what is difference values in s = "" and s = " "(i.e. with a space)

[Art Metzer]

Hi, Akhil.
You are correct, String s = ""; creates an Object, whereas String s = null; does not. As for the contents of s when it contains an empty string, according to a comment in the source code of java.lang.String, "There is an empty string at index 0 in an empty string." Paradoxical, but it explains why s.endsWith( "" ) and s.startsWith( "" ) return true.
Also, String s = ""; is completely different from String s = " ";. An empty string is not the same as a String containing a space.
Hope this helps, Akhil.
Art