Video is locked.

Unlock the full course today

Join today to access over 15,000 courses taught by industry experts or purchase this course individually.

Java Essential Training for Students

Using encapsulation

From the course: Java Essential Training for Students

Start my 1-month free trial
  • Course details

    Taking a college-level programming course? Maximize your learning with these Java tutorials. Peggy Fisher explores command-level programming, basic techniques such as managing loops and creating methods, debugging Java code, working with classes and objects, and storing and sorting arrays. Along the way, she investigates the Java API and Java's capabilities for running simulations and algorithm analysis, and issues challenges to write programs that utilize all of these Java features.

    Instructor

    • Click here to view Peggy Fisher’s instructor page

      Peggy Fisher

      Lecturer at Penn State University

      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

    For each course you will get

    • Exercise files and quizzes
    • Certificate of completion from LinkedIn
    • Offline and audio-only options
    Start my free month
  • Welcome

    - Let's take a minute to talk about encapsulation. Encapsulation is one of the benefits of using object-oriented programming languages. It allows the programmer to hide the instance data definitions as well as protect the integrity of the instance data. It hides the method implementations. This ensures that data structures and operators are used as intended. Encapsulation can be described as a protective barrier that prevents the code and data from being randomly accessed by other code defined outside the class. It always helps to have a concrete example. So let's think about a checking account. Inside a checking account you have a balance. It's declared as private so it can only be updated using a method. One of the operations that you can perform on your balance is you can withdraw money. The withdraw method checks to make sure the balance is greater than the withdrawal amount prior to reducing the balance. This provides a way to make sure the customer cannot get overdrawn by…

  • Practice while you learn with exercise files

    Download the files the instructor uses to teach the course. Follow along and learn by watching, listening and practicing.

    Download the exercise files for this course. Get started with a free trial today.

  • Download courses and learn on the go

    Watch courses on your mobile device without an internet connection. Download courses using your iOS or Android LinkedIn Learning app.

    Watch this course anytime, anywhere. Get started with a free trial today.

Contents