Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
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Chapter 18, Problem 18.19PE
Program Plan Intro
Sierpinski triangle
Program Plan:
- Import required packages.
- Declare a main class named “E19” which extends the “Application” class.
- Declare required variables.
- Declare a “start ()” method which overrides the “start ()” method in the “Application” class. Inside this method,
- Create a triangle pane.
- Create two buttons.
- Create an hbox pane and align it to center. Add the buttons to the hbox pane.
- Set the event handler for the buttons.
- Create a border pane and align it to center.
- Create a scene and place it on the stage.
- Set the title as “Exercise18_19”.
- Display the stage on the window using “primaryStage.show()” method.
- Set the width and height property.
- Set the event handler for the scene.
- Check if the button is primary.
- Set the order of the triangle.
- Check if the button is secondary.
- Set the order of the triangle.
- Check if the button is up. If the condition is true then get and set the order by adding 1.
- Check if the button is down. If the condition is true then get and set the order by subtracting 1.
- Declare a class “SierpinskiTrianglePane”.
- Declare a variable “order”.
- Give function definition to get the order of the triangle.
- Return the “order”.
- Give function definition to set new order.
- Check if the value of “order” is less than 0.
- Assign 0 to the “order”.
- Set the order.
- Call the function “paint ()”.
- Check if the value of “order” is less than 0.
- Give the constructor for the class “SierpinskiTrianglePane”.
- Give function definition for “paint ()”.
- Create three points.
- Clear the pane using “clear ()” function.
- Call the function “displayTriangles ()”.
- Give function definition for “displayTriangles ()”.
- Check of the value of “order” is less than 0.
- Return the statement.
- Check if the value of “order” is equal to 0.
- Create a polygon to draw a triangle.
- Get the points for the triangle.
- Set the color and stroke color.
- Add the triangle to the pane.
- Else,
- Get the mid points for the three edges.
- Call the function “displayTriangles ()” to display the triangles recursively.
- Check of the value of “order” is less than 0.
- Declare a main method using “public static main”.
- Launch the method using “launch ()” method.
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We have the hourly average CPU usage for a worker's computer over the course of a week. Each row of data represents a day of the week starting with Monday. Each column of data is an hour in the day starting with 0 being midnight.
Create a chart that shows the CPU usage over the week. You should be able to answer the following questions using the chart:
When does the worker typically take lunch?
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cpu_usage = [
[2, 2, 4, 2, 4, 1, 1, 4, 4, 12, 22, 23,
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[1, 2, 3, 2, 3, 2, 3, 2, 7, 22, 45, 44,
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[2, 3, 1, 2, 4, 4, 2, 2, 1, 2, 5, 31,
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Chapter 18 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 18.2 - What is a recursive method? What is an infinite...Ch. 18.2 - Prob. 18.2.2CPCh. 18.2 - Show the output of the following programs and...Ch. 18.2 - Prob. 18.2.4CPCh. 18.2 - Prob. 18.2.5CPCh. 18.2 - Write a recursive mathematical definition for...Ch. 18.3 - Prob. 18.3.1CPCh. 18.3 - What is wrong in the following methods?Ch. 18.3 - Prob. 18.3.3CPCh. 18.4 - Describe the characteristics of recursive methods.
Ch. 18.4 - Prob. 18.4.2CPCh. 18.4 - Prob. 18.4.3CPCh. 18.5 - Prob. 18.5.1CPCh. 18.5 - Prob. 18.5.2CPCh. 18.5 - What is a recursive helper method?Ch. 18.6 - Prob. 18.6.1CPCh. 18.6 - How does the program get all files and directories...Ch. 18.6 - How many times will the getSize method be invoked...Ch. 18.6 - Will the program work if the directory is empty...Ch. 18.6 - Will the program work if line 20 is replaced by...Ch. 18.6 - Will the program work if lines 20 and 21 are...Ch. 18.7 - Prob. 18.7.1CPCh. 18.8 - Prob. 18.8.1CPCh. 18.8 - Prob. 18.8.2CPCh. 18.8 - How many times is the displayTriangles method...Ch. 18.8 - Prob. 18.8.4CPCh. 18.8 - Prob. 18.8.5CPCh. 18.9 - Which of the following statements are true? a. Any...Ch. 18.9 - Prob. 18.9.2CPCh. 18.10 - Identify tail-recursive methods in this chapter.Ch. 18.10 - Rewrite the fib method in Listing 18.2 using tail...Ch. 18 - Prob. 18.1PECh. 18 - Prob. 18.2PECh. 18 - (Compute greatest common divisor using recursion)...Ch. 18 - (Sum series) Write a recursive method to compute...Ch. 18 - (Sum series) Write a recursive method to compute...Ch. 18 - (Sum series) Write a recursive method to compute...Ch. 18 - (Fibonacci series) Modify Listing 18.2,...Ch. 18 - Prob. 18.8PECh. 18 - (Print the characters in a string reversely) Write...Ch. 18 - (Occurrences of a specified character in a string)...Ch. 18 - Prob. 18.11PECh. 18 - (Print the characters in a string reversely)...Ch. 18 - (Find the largest number in an array) Write a...Ch. 18 - (Find the number of uppercase letters in a string)...Ch. 18 - Prob. 18.15PECh. 18 - (Find the number of uppercase letters in an array)...Ch. 18 - (Occurrences of a specified character in an array)...Ch. 18 - (Tower of Hanoi) Modify Listing 18.8,...Ch. 18 - Prob. 18.19PECh. 18 - (Display circles) Write a Java program that...Ch. 18 - (Decimal to binary) Write a recursive method that...Ch. 18 - (Decimal to hex) Write a recursive method that...Ch. 18 - (Binary to decimal) Write a recursive method that...Ch. 18 - (Hex to decimal) Write a recursive method that...Ch. 18 - Prob. 18.25PECh. 18 - (Create a maze) Write a program that will find a...Ch. 18 - (Koch snowflake fractal) The text presented the...Ch. 18 - (Nonrecursive directory size) Rewrite Listing...Ch. 18 - (Number of files in a directory) Write a program...Ch. 18 - (Game: Knights Tour) The Knights Tour is an...Ch. 18 - (Game: Knights Tour animation) Write a program for...Ch. 18 - (Game: Eight Queens) The Eight Queens problem is...Ch. 18 - Prob. 18.35PECh. 18 - (Sierpinski triangle) Write a program that lets...Ch. 18 - (Hilbert curve) The Hilbert curve, first described...Ch. 18 - (Recursive tree) Write a program to display a...Ch. 18 - Prob. 18.39PE
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