Question

How can I create a Set in java, and then add objects to it when it is constructed. I want to do something like:

testCollision(getObject(), new HashSet<MazeState>(){add(thing);});

But that doesn’t seem quite right.

Answer 1

In Java 5

new HashSet<MazeState>(Arrays.asList(thing));

Arrays.asList(thing) converts your thing to the list of one element, and from that list set is created.

For the reference:
http://download.oracle.com/javase/6/docs/api/java/util/Arrays.html#asList(T…)