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Java 8 Essential Training

Comparing string values

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.

    Instructor

    • 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

    - There are many scenarios where you need to compare strings to each other. And using simple equality operators as you might do with numbers, doesn't work the way you'd expect. In this project, CompareStrings, I've declared two string variables. They both have the same value, a string of Hello. I'm going to add a bit of conditional code. In Java you can write some simple conditional code with the if statement. The if statement places a boolean condition inside a pair of parentheses. And I'll compare str1 to str2 using the == operator. That's called the equality operator and it works great with primitive numbers, booleans, and characters. With strings it might appear that it works also. If this condition is true, I'll output a string to the console of They match! Then I'll add an else clause after the if clause and in that section I'll output They don't match! Then I'll run the code. Everything seems to match expectations. The two strings are identical and I get back They match! But…

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Contents