string

[jyohere]

what is the difference between

String str=null;
String str=" "; and
String str="";

[JosAH]

what is the difference between

String str=null;
String str=" "; and
String str="";

The second and third initialization set str to an actual string value. The string in
the second initializer contains a single space character. The string in the third
initializer is emty.

The first initializer set the str reference to the value null, i.e. str doesn't refer to a
string value.

kind regards,

Jos

[gaya3]

Hi jyo,

Difference between String x=null;String x="";String x=" " is as follows,
a) In third initialization,String with "blank space" is assigned to String x;
b) In First initialization, null is a condition where the variable (a reference pointer) is completely empty. It is not pointing to any object at all.
c) In second initialization, empty string is asigned to String x;
A empty string is where there is a String object, but its contents have zero length, there is nothing in it.