A DESCRIPTION OF THE REQUEST :
Consider the following piece of code:

List<Map<String,List<Integer>>> list = new ArrayList<Map<String,List<Integer>>>();

One has to repeat type parameters twice (and they can be even longer
than in this example). This kind of repetition of type arguments is
bug-prone and creates unnecessary clutter in the code. One shall be
able to write this code simpler, like this:

List<Map<String,List<Integer>>> list = new ArrayList();


JUSTIFICATION :
For ease of development.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The proposed code shall compile normally via type parameter inference mechanism.

ACTUAL -
This code complies, but produces unchecked warnings.


---------- BEGIN SOURCE ----------
import java.util.*;

public class ListCreate {
public static void main(String[] args) {
List<Map<String,List<Integer>>> list = new ArrayList();
}
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use static factory methods instead of constructors. They work just
fine with type argument inference without any warnings.

import java.util.*;

public class ListCreate2 {
        public static void main(String[] args) {
                List<Map<String,List<Integer>>> list = newArrayList();
        }

        public static <T> ArrayList<T> newArrayList() {
                return new ArrayList<T>();
        }
}
###@###.### 2005-1-24 13:16:39 GMT