Posted By: Anonymous
Sometimes java puzzles me.
I have a huge amount of int initializations to make.
What’s the real difference?
If you call
new Integer(i) you create an instance of type
Integer, which is a full Java object encapsulating the value of your int. Then you call the
toString method on it to ask it to return a string representation of itself.
If all you want is to print an
int, you’d use the first one because it’s lighter, faster and doesn’t use extra memory (aside from the returned string).
If you want an object representing an integer value—to put it inside a collection for example—you’d use the second one, since it gives you a full-fledged object to do all sort of things that you cannot do with a bare