Developer Gene: December 2019

Monday, December 9, 2019

Java 13 - Switch Expressions

JDK 13 was released on September, 2019. One of the new feature is: Switch Expressions (Preview)

This is a preview language feature in JDK 13. It's a new feature of the Java SE Platform that is fully implemented and yet impermanent. This may become permanent in a future Java SE Platform.

Java 13 Switch Expression, Example:

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Notice: You don't have to use breaks statement syntax,

You can just do,

yield - new keyword to return a value from switch expression

Another way,

In order to use preview feature you need to enable it, otherwise you will get the following error:

IntelliJ IDEA v2019.3 support preview feature

Enable Preview feature - IntelliJ

Open File => Project Structure. Under Project language level, choose: 13 (Preview) - Switch expressions, text blocks.

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