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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 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.
- Peggy Fisher is a programmer and content manager at LinkedIn Learning.
Skills covered in this course
- [Instructor] When working with generics in Java, we need to review this concept of type erasure. In programming languages such as Java, type erasure is the process that occurs during compile time to remove the explicit type information from a program. For example, if we had List<Integer>, this would be converted to the nongeneric type, just List. When this happens, the nongeneric version is called the raw type. This step is performed in order to maintain backwards compatibility with code that was written prior to generics becoming part of the language with Java 5. A raw type is the name of a generic class or interface without any type arguments. But it's important to note that a nongeneric class or interface is not a raw type. Again, a raw type is the name of a generic class or interface that does not include the type argument. There's a very subtle difference there. To create a parameterized type of list of type T, you supply an actual type argument for the formal parameter T. So…
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