EBK JAVA PROGRAMMING
EBK JAVA PROGRAMMING
8th Edition
ISBN: 9781305480537
Author: FARRELL
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Chapter 1, Problem 5PE

a.

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Three classes to which each of the objects “mySchoolPlayground” belon...

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Three classes to which each of the objects “shirmpAlfredo” belong...

c.

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Three classes to which each of the objects “grandmasRockingChair” belong...

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A Door Class A computer game usually has many different objects that can be seen and manipulated. One typical object is a door. Whether a player runs through a castle, attacks the forces of an evil empire, or places furniture in a room, a door often comes into play. Implement a Door class as described below as well as a TestDoor class that instantiates three Door objects labeled “Enter,” “Exit,” and “Treasure.” The “Enter” door should be left unlocked and opened. The “Exit” door should be left closed and locked. The “Treasure” door should be left open but locked. A Door class A Door object can • display an inscription, • be either open or closed, and • be either locked or unlocked. Here are some rules about how Door’s work. • Once the writing on a Door is set, it cannot be changed. • You may open a Door if and only if it is unlocked and closed. • You may close a Door if and only if it is open. • You may lock a Door if and only if it is unlocked, and unlock a Door if…
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Rectangle Object Monitoring Create a Rectangle class that can compute the total area of all the created rectangle objects using static fields (variables).  Remember that a Rectangle has two attributes: Length and Width.  Implement the class by creating a computer program that will ask the user about three rectangle dimensions.  The program should be able to display the total area of the three rectangle objects.  For this exercise, you are required to apply all OOP concepts that you learned in class.   Sample output: Enter Length R1:  1 Enter Width  R1:  1 Enter Length R2:  2 Enter Width  R2:  2 Enter Length R3:  3 Enter Width  R3:  3 The total area of the rectangles is 14.00   Note:  All characters in boldface are user inputs.
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