Java 1.4.2, I need a set of unique strings

[Donkey Hottie]

First, try it without doing anything special, you might be prematurely
worrying about a problem that isn't really a problem.

Second, if you find it really is a problem, you can try using
intern().

String parsedString = getParsedString();
String s = parsedString.intern();

I used HashMap, and not intern(), as it is a J2EE application, and I choose
not to pollute the specific heap for classes and interned strings with my
possibly huge number of things. A local HashMap is easier to discard and
thus gc.

I read mixed opinions about intern() in web, and chose to be sure.

 

[Roedy Green]

Java does not consider

String s1 = "Abba" ;
String s2 = "Abba" ;

the same, their reference in memory will be propably different. So two
times "Abba" will be allocated?

they are no the same via == but they are via equals.

See http://mindprod.com/jgloss/interned.html

 

[Mike Schilling]

they are no the same via == but they are via equals.

I'm sure we've been through this at least 17 times in this thread, but
in this specific case (two identical constant strings), they will in
fact be the same when checked with ==, the reason being that constant
strings are interned.

 

[scuzwalla]

they are no the same via == but they are via equals.

Equal string literals will be the same via ==, actually.

Equal strings in general frequently won't be, though.

 

[Roedy Green]

I'm sure we've been through this at least 17 times in this thread, but
in this specific case (two identical constant strings), they will in
fact be the same when checked with ==, the reason being that constant
strings are interned.

I explain that in the essay I referred the OP to
http://mindprod.com/jgloss/interned.html

I did not take the example literally. I took it to mean she had two
variables that each pointed to a the same sequence of letters.

 

[Mike Schilling]

I explain that in the essay I referred the OP to
http://mindprod.com/jgloss/interned.html

I did not take the example literally.

Always take examples literally; if you want to explain that
similar-looking situations work differently, give an example of that.
Otherwise, you mislead people.