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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Expert Solution & Answer
Chapter 1, Problem 1E
Explanation of Solution
Given: The class names such as Circle, Square, Triangle, Person, and Canvas.
To find:Â The possible way to create another circle and then a square.
Solution:
Start BlueJ and open a new project named figures.
A new window will appear on the screen in which each rectangular block will represent a class.
In order to create an object of Circle class, it is necessary for the user to right click on the Circle class and then click on the new Circle() from the pop-up menu. The user can provide a specific name of the instance and then click ok button.
A new red rectangle will appear at the bottom of the BlueJ screen labeled with the name of the instance provided by the user.
In order to create an object of Square class, it is necessary for the user to right click on the Square class and then click on the new Square() from the pop-up menu. The user will be prompt to provide a specific name of the instance and then click ok button.
Another red rectangle will appear at the bottom of the BlueJ screen labeled with the name of the instance provided by the user.
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Students have asked these similar questions
Exercise#2:
Calculate the area and perimeter of right angled triangle.
Why Do We Need Encapsulation? Please explain broadly on why do we need Encapsulation
.• 3. Rearrange these lines of code to construct a square, then another square that touches the first square and is
situated to the right, then another square that touches the first square and is situated below. (Hint: Draw a
picture.)
Not all lines are useful.
Press start to begin.
36
Start
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Rectangle first = new Rectangle(5, 10, 20, 20);
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new Rectangle(5, 25, 20, 20);
Rectangle second =
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ebook-bjeo-6-ch02-sec04-int1-5 5t.getX(), first.getY() + first.getHeight(),
20, 20);
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new Rectangle();
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Rectangle first = new Square(5, 10, 20);
Rectangle third = new Rectangle(
first.getX() + first.getWidth(), first.getY(),
20, 20);
40
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new Rectangle(25, 10, 20, 20);
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MacBook Air
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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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