Join Peggy Fisher for an in-depth discussion in this video Using encapsulation, part of Java Essential Training for Students.
- 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 withdrawing more money…than what is in the account.…
- Getting started with parsing
- Reviewing data types
- Using decisions
- Creating user-defined methods
- Command-line debugging
- Exploring the Java API
- Creating and instantiating classes
- Working with interfaces
- Storing items with arrays
Skill Level Intermediate
Q: How can I make my debugger function like the author’s?
<div>A: When you are debugging your program in NetBeans, if you do not see the new contextual items on the menu bar for stepping into your code, check to see if the source file is accidentally deselected.</div><div> </div><div>Highlight the program you want to debug in your projects folder. In the menu bar, choose Windows > Debugging > Sources. A new window will appear with the file path name. If the checkbox is not selected, click the box to select this file.</div><div> </div><div>Now you can go back to your program and rerun the debug operation on your code.</div>
1. Command Level Programming
2. Basics Review
4. Java API
5. Simulations and Algorithm Analysis
6. Classes and Objects
7. More on Classes
8. Data Structures
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