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Advanced Java Programming

Generic methods in Java

From the course: Advanced Java Programming

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  • Course details

    Want to get more out of the Java language and platform? In this platform- and framework-neutral course, instructor Bethan Palmer digs into some of the language’s more advanced features, helping you expand your programming skills as she equips you with techniques you can use when building applications anywhere Java is used: in web, mobile, and desktop applications. Bethan covers a variety of topics, including generics, working with the Collections Framework, and functional programming. Plus, learn about I/O in Java, working with files and directories, and structuring applications using the modular system available in Java.


    • Click here to view Bethan Palmer’s instructor page

      Bethan Palmer

      Software Developer and Java Champion

      Bethan Palmer is a developer who loves technology and has a master's degree in computer science.

      For her day job, Bethan is a Java programmer and the product manager for a Java PDF library at IDRsolutions. She gets to spend a lot of time writing and refactoring code, as well as deciding on product strategy and road maps.

      She also spends much of her time attending conferences and is a regular speaker at Oracle Code One and NetBeans Days. She manages and writes articles about Java, technology, the books she's reading, and conferences she's attending on the Java PDF blog.

    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
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  • Learn advanced Java programming

    - [Instructor] Generic methods in Java are methods that allow you to create a new type parameter just for that method. This is useful if you are writing a method but want to be flexible about the type of objects you can pass in. In this example, I have an array of characters called charArray. I also have an array of booleans called boolArray, and an array of integers called intArray. Then, I have created a method called arrayToList that iterates through all of the objects in an array and adds them to a list. I want to be able to pass any of these arrays into the method, even though they are of different types. So the first thing I have tried is making the arguments of the array to list method object types. In Java, object is a parent type of all other object types, so I can pass in arrays and lists of any types to this method. In the main method, I have used the array to list method to create a list of characters from charArray, a list of booleans from boolArray, and a list of…

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