![]() ![]() In fact, Oracle’s choice to speed up the Java development process through the six-monthly release of new versions, is well suited to the language update process, based on feedback and requests from developers. For these and other reasons, after more than 20 years, the need was felt to update the construct with new features. The scope of construct-level local variables continues to be awkward. ![]() The fall through technique is always complex to manage and error prone. ![]() The syntax remained verbose, complex, and very different from the other constructs. With the advent of enumerations in Java, switch has taken on greater significance, but not enough to be considered a developer favorite. Within Java programming, however, it has always been seen by programmers as a secondary construct. This construct has characteristics that are well suited to the creation of typical programs that were once developed with this language, for example parsers and binary coders. The switch construct, like all Java constructs and the ternary operator, has been inherited from the C language since the first version of Java (an exception is the enhanced for loop that was introduced with Java 5). To get a clearer picture of the situation, we also briefly describe the history of the construct (if you are not interested you can also skip the next section). We will therefore distinguish the switch construct when used as a statement and as an expression, but rather than talking only about switch expressions, it seems more appropriate to talk about a renewed construct: the new switch, which can now be used as a statement or as expression. However, the introduction of switch expressions also caused the modification of the original construct, with the definition of a new word in the Java vocabulary ( yield), and the possibility of using the arrow notation in this construct, which was introduced with the lambda expressions with Java 8. This novelty is known as the switch expression. In this article we will see how Oracle with Java 14 has officially introduced an evolution of the switch construct, which can now also be used as an expression, that is, it can return a value. The aim is to make the reader aware of how important it is to move forward from Java 8, explaining the enormous advantages that the latest versions of the language offer. These articles will guide the reader step by step to explore the most important features introduced starting from version 9. What you are reading is an article in a series titled “Going beyond Java 8”, inspired by the contents of my book “ Java for Aliens”. traditional switch statementīut in Java 12, we can use break to return a value from a switch.According to some surveys such as that of JetBrains, version 8 of Java is currently the most used by developers all over the world, despite being a 2014 release. So break syntax is no longer compiled in Java 13, it uses yield.Īs traditional switch statement, there are many break statements make it unnecessarily verbose and hard to debug errors. Java 13 extends the previous Java 12 Switch expressions by adding a new yield keyword to return a value from switch expression. This is another preview language feature defined in java 13. ![]()
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