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Java 8 Essential Training

Using two-dimensional arrays

From the course: Java 8 Essential Training

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  • Course details

    If you want to build applications for mobile devices, desktop computers, or the web, you need to know Java. This course provides the foundation for learning Java SE (Standard Edition), so you can build your first apps or start exploring the language on your own. Author David Gassner shows how to install Java and the IntelliJ IDEA IDE, and start working with variables, data types, keywords, and other critical language components. He also helps you control program flow with conditional logic and loops, store data with the Java Collections Framework, and understand how Java implements object-oriented coding principles such as inheritance and polymorphism.


    • Click here to view David Gassner’s instructor page

      David Gassner

      Managing Staff Instructor, LinkedIn Learning Technology Library at LinkedIn

      David Gassner is the author of over 60 video-based technical training courses for software developers.

      David is a senior staff instructor who specializes in development platforms and programming languages including Android and Java. He currently creates training content for Android developers and content that covers multiple programming languages including Java, C#, Visual Basic, and Go. He was formerly the president and founder of Bardo Technical Services, an Adobe Solutions Network Training Provider. As an Adobe Certified Expert, he wrote courseware for Adobe and delivered extensive training on Flex, ColdFusion, Dreamweaver and Flash. He was the author of Wiley's Flex 3 Bible and Flash Builder 4 and Flex 4 Bible. He most recently designed and developed Audio Cues—an Android app for running sound in live performances—which is available in the Google Play store.

    Skills covered in this course

  • Welcome

    - Java supports the use of multidimensional arrays using the same sort of syntax that you use with simple arrays. But instead of using a single pair of brackets, you add brackets as you add dimensions to the array. In this project, MultiArrays, I'll declare a String array and I'll start with a pair of brackets just like I did before, but this time, I'll add a second pair of brackets. This will be a two-dimensional array. I'll name the array states and then as I did before, I'll initialize it with the new keyword and the data type. But this time when I select the data type, IntelliJ IDEA adds two pairs of brackets to match the original declaration and I can set the size of both dimensions of the array here. I'll set the outer array as 3 items and each item within that array will have 2 sub items. And so now I have a two-dimensional array. Next, I'll set the values. I'll reference an item in the array, starting with the array name, and then once again, two pairs of brackets. For the…

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