Using sets with Strings

Question

Hello, I'm in a dilemma here
I'm using a Set to store Strings:
private Set<String> X;
I have a class that receives a String and first check if the string is allready on the set and if not it adds it:
public boolean method (V e) {
if(X.contains(e.getString()) )
return false;
Y.add(e.getString());
return true;
So I got confussed when looking at the properties of a Set, (i.e. do I need to check if the string is allready there, or it'll do it for me?)
and if I have to check it myself can I use .contains() to compare the given string to all strings in the set?
Thanks
Edited by: edsc86 on Nov 18, 2008 7:03 PM
Edited by: edsc86 on Nov 18, 2008 7:04 PM
Edited by: edsc86 on Nov 18, 2008 7:05 PM

Answer 1

Dude! Do NOT screw around with the colors like that. It makes you post way hard to read. Use the CODE button or [[code] and [[/code] tags for sections of code, and an occasional italic or bold for emphasis, and the quote button or a > for quoting.
You don't need to check if it's there. Read the docs for Set. They tell you that it will add it if it's not there, and return true if the set was modified (that is, if it wasn't already there).
Set<String> set = new HashSet<String>();
boolean b1 = set.add("x"); // adds x, returns true
boolean b2 = set.add("x"); // does nothing to the set, returns false