Part 1 reveals the covariant and contravariant relationships between simpler elements such as array types and generic types, as well as the special Java language element, the wildcard. Part 2 ...

part of the beginner lesson, but you can do it. You just may need to rewind and practice a little bit more than with the previous two lessons. First, we're going to learn about arrays. After that ...

You can add one or several random numbers into your array variables, but Java does not guarantee that each number is unique. Right-click the Java file you want to edit and select "Open With." ...