Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
6th Edition
ISBN: 9780134477367
Author: David J. Barnes, Michael Kolling
Publisher: PEARSON
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Textbook Question
Chapter 1, Problem 5E
This is a very simple example, and not many colors are supported. See what happens when you specify a color that is not known.
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Read the instructions below and write your code using Microsoft Visual Studio (Community version).
Build your own console application with C#.
Write a Rectangle class, the private data members are the length (len) and width (wid) of the rectangle, the parameterless constructor sets len and wid to 0, and the parameterized constructor sets the value of length (len) and width (wid). In addition, the class also includes common methods such as calculating the perimeter of the rectangle, calculating the area of the rectangle, obtaining the length value of the rectangle, obtaining the width value of the rectangle, and modifying the length and width values of the rectangle to the corresponding formal parameter values.
Please upload your executable C# file as attachment in the system.
Look at the API of the Point class and find out how to construct a Point object. Write a Java program
“PointTester”, that constructs two points with coordinates (3, 4) and (–3, –4). Find the distance
between them, using the distance method. Print the distance, as well as the expected value. (You may
draw a sketch on graph paper to find the value you will expect.)
- Update your program so it randomly select coordinate points (x,y), where −50 ≤ ? ≤ 50 ??? ? ∈
[−90, 90].
In this second exercise, we are going to look at the iIn this exercise, you are going to complete the Rectangle class. You need to complete the class so that you can print and compare two rectangles. Once complete, use the RectangleTester to test the results. In the tester class, you are given 3 rectangles that you should print and compare.
Sample results are provided below.
Sample output
A rectangle with a width of 5 and a height of 4
A rectangle with a width of 5 and a height of 4
A rectangle with a width of 10 and a height of 4
true
false
public class RectangleTester{public static void main(String[] args){Rectangle rect1 = new Rectangle(5, 4);Rectangle rect2 = new Rectangle(5, 4);Rectangle rect3 = new Rectangle(10, 4);// Print all three rectangles// Print one true statement comparing rectangles// Print one false statment comparing rectangles}}
public class Rectangle{
private int width;private int height;public Rectangle(int width, int height) {}}
Chapter 1 Solutions
Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
Ch. 1 - Prob. 1ECh. 1 - Prob. 2ECh. 1 - Prob. 3ECh. 1 - Prob. 4ECh. 1 - This is a very simple example, and not many colors...Ch. 1 - Prob. 6ECh. 1 - Prob. 7ECh. 1 - Prob. 8ECh. 1 - Prob. 9ECh. 1 - Select Show Terminal from the View menu. This...
Ch. 1 - Select Show Code Pad from the View menu. This...Ch. 1 - Prob. 12ECh. 1 - Prob. 13ECh. 1 - Prob. 14ECh. 1 - Look at the pop-up menu of class Picture again....Ch. 1 - In the source code of class Picture, find the part...Ch. 1 - Add a second sun to the picture. To do this, pay...Ch. 1 - Prob. 18ECh. 1 - Prob. 19ECh. 1 - Prob. 20ECh. 1 - Create an object of class Student. You will notice...Ch. 1 - Prob. 22ECh. 1 - Prob. 23ECh. 1 - Call the numberOfStudents method of that class....Ch. 1 - Look at the signature of the enrollStudent method....Ch. 1 - Prob. 26ECh. 1 - Prob. 27ECh. 1 - Prob. 28ECh. 1 - Prob. 29ECh. 1 - In this chapter we have mentioned the data types...Ch. 1 - What are the types of the following values?...Ch. 1 - Prob. 32ECh. 1 - Write the header for a method named send that has...Ch. 1 - Prob. 34ECh. 1 - Prob. 35ECh. 1 - Prob. 36E
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