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Starting Out with Java: Early Objects (6th Edition)
6th Edition
ISBN: 9780134462011
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 8FTE
Find the errors in the following code:
8. The following statement should assign 0 to 2 if a is less than 10; otherwise, it should assign 7 to z. What is wrong with it?
z = (a < 10) : 0 ? 7;
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3. Problem Description: Define the Circle2D class that contains:
Two double data fields named x and y that specify the center of the circle with get
methods.
• A data field radius with a get method.
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A no-arg constructor that creates a default circle with (0, 0) for (x, y) and 1 for radius.
•
A constructor that creates a circle with the specified x, y, and radius.
•
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•
A method getPerimeter() that returns the perimeter of the circle.
•
•
•
A method contains(double x, double y) that returns true if the specified point (x, y) is inside
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circle. See Figure (b).
A method overlaps (Circle2D circle) that returns true if the specified circle overlaps with this
circle. See the figure below.
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(a)
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Figure (a) A point is inside the circle. (b) A circle is inside another circle.
(c) A circle overlaps another…
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Chapter 4 Solutions
Starting Out with Java: Early Objects (6th Edition)
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