Eclipse message saying List cannot be resolved to a type

Issue

I am trying the following code in eclipse:

public class A {    
    List<Integer> intList = new ArrayList<Integer>();
}

However it gives me an error saying: List cannot be resolved to a type and ArrayList cannot be resolved to a type.

Is there some library I need to add and how do I do that?

Solution

You can press Shift+Ctrl+O for auto importing.

Answered By - christian.vogel