Challenge: Simple calculation

From the course: Learning Java 8

  • Course details

    Java is one of the top-five programming languages, and is used for websites, embedded controllers, and Android app development. This is an introduction to get you started programming with Java. Peggy Fisher introduces the basics: data types, strings, arrays, expressions, loops, and functions. She'll help you control the flow and logic of your code, and create classes using the principles of object-oriented design. Then go a bit beyond the basics and learn advanced techniques for working with arrays, manipulating files, and building graphical user interfaces (GUIs) that respond to user input. This three-hour capsule course is perfect for developers who need to get up to speed with Java fast, as well as for beginning programmers who want their first taste of this popular language.


    • Click here to view Peggy Fisher’s instructor page

      Peggy Fisher

      Content Strategist, Software Development Languages at Linkedin Learning Solutions with content

      Peggy Fisher is a programmer and content manager at LinkedIn Learning.

      Peggy's main focus is application programming in Java, Arduino, and C++. She has also worked on courses in COBOL and discrete ,athematics. Previously she was a faculty member at Penn State University's College of Information Sciences and Technology. She started out as a programmer working for a large insurance company, but after 18 years she left her job as a director of information technology to pursue her true passion teaching. She earned a master's degree in math education, and went on to teach high school math and computer science in Pennsylvania. In 2012, Peggy accepted a position as an instructional designer at Penn State, and shortly thereafter began teaching Intro to Application Programming with Java. She is a strong supporter of women in STEM. As one of the few female programming teachers, she serves as a mentor to incoming female freshmen who are considering a career in programming. She was also the K–12 outreach coordinator for the college, where she scheduled, ran, and taught summer camps for middle school and high school students. In a PBS NewsHour interview, she expressed that all students should take at least one programming class either in high school or college. Peggy enjoys constantly learning and finding new and exciting ways to bring technology to life in and outside of the classroom, such as using Arduino microcontrollers or Lego Mindstorms, to help make learning hands-on and fun.

    Skills covered in this course

  • Welcome

    - This challenge is designed to give you an opportunity to use the skills that you learned in this section. You'll be given an algorithm that describes the steps for calculating the surface area of a house, to determine the amount of paint needed. You are only required to calculate the total surface area of the exterior of the house, but you can extend this challenge by also calculating the gallons needed by asking the user for the amount of coverage area of one gallon of paint. One hint is that don't forget that a house has a front and a back and two sides. The challenge objectives for this activity is to write a complete Java program, translate algorithm steps into Java, use appropriate data types for variables, prompt the user for information, and print the results. Okay, now let's go over the algorithm. These are the steps needed to paint the exterior of a house. Declare all variables. Ask the user for the house length, the width and the height. Ask for the number and size of the windows. Ask for the number and size of the doors, because windows and doors do not need to be painted. Finally, calculate the total surface area that will be painted. Okay, that's your challenge. I'm estimating 20 minutes for this activity, but it might take a little longer if you're new to this process. Have fun.

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