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Learn how to use Java generics to write cleaner and more robust code. Peggy Fisher walks through how to describe generics in Java and goes over syntax examples and type erasure. Peggy also covers the existing types of generic classes, interfaces, and methods, and shows how to create your own. Plus, at the conclusion of the course, she provides a hands-on challenge designed to help you practice and master what you learned.
Content Strategist, Software Development Languages at Linkedin Learning Solutions with Lynda.com contentPeggy 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
- [Instructor] Now, you're probably wondering, what does the syntax look like for using generic classes, interfaces, and methods? A generic class is defined with the following format. The type parameters, in this case, T1, T2, et cetera, are delimited by angle brackets. The type follows the class name immediately. The class can have multiple type parameters, as you see in this example. You may be wondering what are these type parameters that I'm talking about? Well, there are some common type parameter names that you'll see, starting with E, which is used extensively by the Java Collections. E is usually used to represent element. We have K to represent a key, N if you're going to use numbers, T is a generic type, V would be for a value. I said earlier that we can also have a generic method. The syntax for a generic method looks like this: public static type void print E list. In this example, the syntax included a type parameter in angle brackets. In our case, it says E, and this…
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