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IntelliJ IDEA ©JetBrains. All rights reserved Modern Java with IntelliJ IDEA Trisha Gee (@trisha_gee) Java Champion & Java Advocacy Lead, JetBrains

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Define “Modern Java”

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https://www.jetbrains.com/lp/devecosystem-2020/java/ Despite the emergence of newer versions, Java 8 is still most beloved. It is used by 3/4 of Java developers. Java 11 is growing more popular. Compared to last year, its usage has increased by 10 percentage points.

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https://flic.kr/p/8xhk74

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Java 11 Long Term Support (LTS) Release; ~3 years support

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Java 15 Current release; be prepared to upgrade in March 2021

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IntelliJ IDEA can help you

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Why bother?

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Super happy with Java 8, thanks

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Java 11 Long Term Support (LTS) Release

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var

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Convenience Factory Methods for Collections

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Collecting to Unmodifable Collections

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New Methods on Optional

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Java 15 Current Release

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Switch Expressions

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Switch Expressions https://jb.gg/ij-jdk12

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Text Blocks

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Text Blocks https://jb.gg/ij-jdk13

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Preview Features

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Pattern Matching for instanceof

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Pattern Matching for instanceof https://jb.gg/ij-jdk14

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Records

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Records https://jb.gg/ij-jdk14

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Sealed Types

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Sealed Types https://jb.gg/ij-jdk15

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Tips for Migration

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http://bit.ly/8-to-11

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Address compiler warnings

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Address compiler warnings …they are there for a reason

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Update your dependencies

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Update your dependencies And add new ones

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Update your build tool

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Update your build tool Updated Maven and Gradle required

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Let your tools do the hard work

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http://bit.ly/ij-modern-java @trisha_gee