Java Programming, Loose-leaf Version
8th Edition
ISBN: 9781337685917
Author: Joyce Farrell
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 2, Problem 1RQ
Program Description Answer
After compilation, when a data in the
Hence, the correct answer is option “A”.
Expert Solution & Answer
Explanation of Solution
Constant:
The variable is defined as constant variable when the data item cannot be changed while the program is running.
- Constants are mostly used to define default values.
- For example: PI has the constant value 3.14.
- Consider the following statement in a Java class, the number 143 is constant, every time the java application containing the below statement with constant 143 is executed, the value 143 is displayed.
System.out.println(143);
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Rooms.txt (427 B)
Imagine we were creating a Textbased Adventure Program where a user can navigate through a series of rooms and pick up items, use them, put them down and get points. This assignment has us just reading the rooms of a game from a file into our program and displaying the rooms, not building the entire game.
Create a new Java Project. Name it TestReadRoomFile or something like that.
Add a Room class to the project according to the following UML.
Room
-roomNumber: int
the room number
-roomName: String
the name of the room
-description: String
the description of the room
+Room(roomNumber: int, roomName:String, description:String)
Constructor. Assign the parameters to the instance variables.
+getRoomName():String
returns the name of the room
+getRoomNumber(): int
returns the room number
+getDescription(): String
returns the description
+toString():String
returns a string with all the room information.
Create a ReadRoomFile class similar to the OOP example…
What is a unit test? Assume a developer writes the following source code to calculate the sum of two numbers. Describe how a unit test can be developed to test this class. You may use code, pseudo code, or natural language.
{eq}public\ class\ MyConcate\ \{ \\ \quad public\ String\ concatenate(String\ one,\ String\ two)\{ \\ \quad \quad return\ one+two; \\ \quad \} \\ \} {/eq}
The calculator should have the features and functions similar to the calculator found in Windows OS. Given below is the interface of the calculator and you should also design a similar user interfaceAssignment Requirements Develop the complete application using Java. Your calculator should have mandatory functions such as Add, Subtract, Multiply and Divide. Ensure your program can handle exceptions.Note: You only need to include buttons for the numbers, addition, subtraction, multiplication, division, backspace, equal, cancel, and negation. Other buttons are not needed. The program must be well documented with proper comments where needed for readability and to explain relevant coding.
Chapter 2 Solutions
Java Programming, Loose-leaf Version
Ch. 2 - Prob. 1RQCh. 2 - Prob. 2RQCh. 2 - Prob. 3RQCh. 2 - Prob. 4RQCh. 2 - Prob. 5RQCh. 2 - Prob. 6RQCh. 2 - Prob. 7RQCh. 2 - Prob. 8RQCh. 2 - Prob. 9RQCh. 2 - Prob. 10RQ
Ch. 2 - Prob. 11RQCh. 2 - Prob. 12RQCh. 2 - Prob. 13RQCh. 2 - Prob. 14RQCh. 2 - Prob. 15RQCh. 2 - Prob. 16RQCh. 2 - Prob. 17RQCh. 2 - Prob. 18RQCh. 2 - Prob. 19RQCh. 2 - Prob. 20RQCh. 2 - Prob. 1PECh. 2 - Prob. 2PECh. 2 - Prob. 4PECh. 2 - Prob. 5PECh. 2 - Prob. 6PECh. 2 - Prob. 7PECh. 2 - Prob. 8PECh. 2 - Prob. 9PECh. 2 - Prob. 10PECh. 2 - Prob. 11PECh. 2 - Prob. 12PECh. 2 - Prob. 1GZCh. 2 - Prob. 2GZCh. 2 - Prob. 1CPCh. 2 - Prob. 2CP
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