Generic wildcards in variable declarations in Scala

Question

In Java I might do this:

class MyClass {
    private List list;

    public void setList(List l) { list = l; }
}
<         


        

Answer 1

The direct analog to

import java.util.List;
List<? extends MyInterface> list;

is

import java.util.List
var list : List[_ <: MyInterface]  = _;

Same deal with Buffer

To answer a comment you made earler, in Java type parameters are always invariant, not covariant.