Search a object in a vector

Hi,
I am supposed to see whether an object of a class (not Object class) is already in vector containing some objects of same class.
for example:
I have a class "Edge" having a sourceNode and targetNode.
I am storing the instances of this class in an vector but before storing I need to know whether the new instance already exists in the vector or not?(edge with same source and target node)

Can anyone let me know how can i do it?

Thanks

You can use contains(Object o) method to test if that is already exists....

Or you can start to read here for more understandable details,

regards,
sukatoa

You can also use java.util.TreeSet<E>. It does it all at once for you :)