This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
I am working on a problem where in I have 2 Maps with key ,value as String and Object containing all the attributes for the class.
Now some elements in both the maps can be same.
Some can be present in one Map and not in second.
Some can be present in second Map and not in first Map.
The problem is to compare both the Maps.
The logic I am using is.
Take a temp Set say "traversed"
a)Iterate on Map 1.
b)Get the key and
c)So traversed set has all the elements present in Map1
d)Iterate on map2
e)Get the key and
f) here it wont consider values that are present in Map 2 and also in Map 1
The logic seems to be working fine.Just wanted some suggestion on any other way I can handle the situation.
E.g. Map 1
I don’t understand what you are trying to do. I have not seen a Map with an add() method? Do you mean java.util.Map, or a different sort of Map?
Joined: Oct 13, 2005
Go through the Java Tutorials, and find out about the bulk operations. That will allow you to implement S₁ ∪ S₂, S₁ ∩ S₂, S₁ ⊆ S₂, and S₁ \ S₂. etc. You can use S₁ and S₂, as the entry sets of the two maps, or the key or value sets.