In a prior video, you learn about how to use static methods that are called from a class without the class first being instantiated. But when a method needs to work with persistent data that’s stored within an object, it’s known as an instance method—that is, a method that belongs to an instance of the class.
- [Instructor] I've previous described…how to use static methods that are called from a class…without the class first being instantiated.…In this code I have a method named getInput…that's defined in the class InputHelper.…I call the method from the class itself.…I'll take a look at that method…by control clicking Windows or command clicking on Mac,…and I see that the method has the keyword static,…and that's what allows the method to be called…in this way, but frequently a method needs to work…with persistent data that's stored within an object,…then it's known as an instance method,…that is a method that belongs to an instance…of the class rather than to the class itself.…
Static methods are marked with the keyword static.…Instance methods simply don't have that keyword.…So if I delete the keyword static,…this method now must be called…from an instance of the InputHelper class,…not from the class.…I'll go back to the main class,…and I see that there's now an error indicated,…and it's telling me that I can't call getInput…
- Debugging Java code
- Handling exceptions
- Creating custom classes
- Working with inheritance
- Managing data collections
- Using Java packages and libraries
- Preparing a Java application for deployment
Skill Level Intermediate
1. Exception Handling and Debugging
2. Create Custom Classes
3. Work with Inheritance
4. Manage Data Collections
5. Use Java Packages and Libraries
Work with dates and times7m 12s
6. Prepare a Java Application for Deployment
Next steps1m 12s
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