package generic_out; import java.util.Vector; public class TestParameterizedType1 { void use () { Vector<Integer> vn1= new Vector<Integer>(); vn1.add(13); Vector<? extends Number> vn = /*]*/vn1/*[*/; } private Vector<? extends Number> me() { Vector<Integer> vn= new Vector<Integer>(); vn.add(13); return vn; } }