CODEWITHSUNDEEP
javaperformancelistgwtcollections
Jama A.
Jama A.

Reputation: 16089

Different List initializing in GWT?

While learning GWT I faced another type of initialization. I'm wondering what is the difference between:

 1) List<T> = new ArrayList<T>();

and

 2) List<T> = Lists.newArrayList();

Which one has advantages and why?

Upvotes: 1

Views: 1008

Answers (1)

Alexandr
Alexandr

Reputation: 9505

I can only suppose:

When you work with generics it's not convenient to set T both in List<T> and new ArrayList<T>(); To resolve this drawback static helper methods are used:

List<T> = Lists.newArrayList();

Here type T is defined via type inference. A a rule such methods are implemented like this:

public static <T> List<T> newArrayList() {
    return new ArrayList<T>();
}

Upvotes: 2

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