Java Reference
In-Depth Information
Exercise R17.10. Explain the type bounds of the following method of the
Collections
class:
public static <T extends Comparable<? super
T>> void sort(List<T> a)
Why doesn't
T extends Comparable
or
T extends
Comparable<T>
suffice?
Exercise R17.11. What happens when you pass an
ArrayList<String>
to a method with parameter
ArrayList?
Try it
out and explain.
Exercise R17.12. What happens when you pass an
ArrayList<String>
to a method with parameter
ArrayList
, and
the method stores an object of type
BankAccount
into the array list?
Try it out and explain.
Exercise R17.13. What is the result of the following test?
ArrayList<BankAccount> accounts = new
ArrayList<BankAccount>();
if (accounts instanceof ArrayList<String>) .
. .
Try it out and explain.
783
784
Exercise R17.14. If a class implements the generic
Iterable
interface, then you can use its objects in the Ȓfor eachȓ loopȌsee
Advanced Topic 15.1
. Describe the needed modifications to the
LinkedList<E>
class of
Section 17.2
.
Additional review exercises are available in WileyPLUS.
PROGRAMMING EXERCISES
Exercise P17.1. Modify the generic
Pair
class so that both values have
the same type.
