Java Reference
In-Depth Information
Exercise P15.15. Modify the
Invoice
class of
Chapter 12
so that it
implements the
Iterable<LineItem>
interface. Then demonstrate
how an
Invoice
object can be used in a Ȓfor eachȓ loop.
GExercise P15.16. Write a program to display a linked list graphically.
Draw each element of the list as a box, and indicate the links with line
segments. Draw an iterator as in
Figure 3
. Supply buttons to move the
iterator and to add and remove elements.
Additional programming exercises are available in WileyPLUS.
PROGRAMMING PROJECTS
Project 15.1. Implement a class
Polynomial
that describes a
polynomial such as
x
10
x
7
p( x) = 5
+9 ɨ x ɨ 10
Store a polynomial as a linked list of terms. A term contains the
coefficient and the power of x. For example, you would store p(x) as
(5, 10), (9, 7), ( ɨ 1, 1), (10, 0)
Supply methods to add, multiply, and print polynomials, and to compute
the derivative of a polynomial.
695
696
Project 15.2. Make the list implementation of this chapter as powerful as
the implementation of the Java library. (Do not implement type
parameters, though.)
ȗ Provide bidirectional iteration.
ȗ Make
Node
a static inner class.
ȗ Implement the standard
List
and
ListIterator
interfaces
and provide the missing methods. (Tip: You may find it easier to
extend
AbstractList
instead of implementing all
List
methods from scratch.)
