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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Chapter 3, Problem 41E
Program Plan Intro
To complete a Tree class that has fields of type Triangle as well as Square inside it
Program Plan:
           Create a program in BlueJ using Java and complete the Tree class. The Tree class should consist of the fields such leaves and trunk of type Triangle and Square respectively. The constructor should also call an internal method named setup that can make both shapes visible and the tree should look like a fir tree.
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In this exercise, you are going to build on your Circleclass from the previous exercise.
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in java
In this exercise, you are going to build on your Circleclass from the previous exercise.
You are going to add 2 method, areaDifference and perimeterDifference. Both methods take a doubleradius of a second circle and return the difference from the current circle.
For example, if you create a Circle object with a radius of 4 and call areaDifference(3), you will return the diffence between the area of a circle with radius 4 and the area of a circle with a radius of 3. perimeterDifferencewould be the same.
Make sure you create at least one Circle and test and print the results of your methods.
given: public class Circle{private double radius;public Circle(double theRadius){radius = theRadius;}// Add a method called area that returns the area of a circle// using Math.PIpublic double area(){return Math.PI*radius*radius;}// Add a method called perimeter that returns the perimeter of a// circle using Math.PIpublic double perimeter(){return Math.PI*2*radius;}}
can you please help me with the last part of this code because I don't understand this; part of the code is below and the other part of the code is in the photo.
question:
In the LightsOutPuzzle class, write a method copy(self) that returns a new LightsOutPuzzle object initialized with a deep copy of the current board. Changes made to the original puzzle should not be reflected in the copy, and vice versa.
>>> p = create_puzzle(3, 3)>>> p2 = p.copy()>>> p.get_board() == p2.get_board()True >>> p = create_puzzle(3, 3)>>> p2 = p.copy()>>> p.perform_move(1, 1)>>> p.get_board() == p2.get_board()False
In the LightsOutPuzzle class, write a method successors(self) that yields all successors of the puzzle as (move, new-puzzle) tuples, where moves themselves are (row, column) tuples. The second element of each successor should be a new LightsOutPuzzle object whose board is the result of applying the corresponding move to the current…
Chapter 3 Solutions
Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
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