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Small improvement on the enhanced switch block explanation #2899

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Merged
merged 8 commits into from
Jan 7, 2025
Merged

Small improvement on the enhanced switch block explanation #2899

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ea2b915
Small improvement about the enhanced switch block
josealonso Jan 3, 2025
f08d614
Update concepts/switch-statement/about.md
josealonso Jan 3, 2025
6a8fb92
Update concepts/switch-statement/about.md
josealonso Jan 3, 2025
c9cd6a9
Update concepts/switch-statement/about.md
josealonso Jan 3, 2025
2bc849f
Correct info about the Guarded Patterns
josealonso Jan 3, 2025
992420f
Merge branch 'main' into patch-3
josealonso Jan 6, 2025
056870f
Update links.json
josealonso Jan 6, 2025
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Update contributors field.
josealonso Jan 6, 2025
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17 changes: 17 additions & 0 deletions concepts/switch-statement/about.md
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Expand Up @@ -145,6 +145,23 @@ Starting with Java 14 (available as a preview before in Java 12 and 13) it is po
However if you use the new `->` notation it must be followed by either: a single statement/expression, a `throw` statement or a `{}` block.
No more confusion!

The first LTS (Long Term Support) version that had these improvements was Java 17, released on September, 2021.

In addition, a feature called `Guarded Patterns` was added, which allows you to do checks in the case label itself.

```java
String dayOfMonth = getDayOfMonth();
String day = "";
return switch (day) {
case "Tuesday" && dayOfMonth == 13 -> "Forbidden day!!";
case "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" -> "Week day";
case "Saturday", "Sunday" -> "Weekend";
default -> "Unknown";
};
```

The first LTS (Long Term Support) version that had these improvements was Java 21, released on September, 2023.

You can find more information on enhanced switch [here][switch1], [here][switch2] and on the [oracle documentation][oracle-doc].

[yield-keyword]: https://www.codejava.net/java-core/the-java-language/yield-keyword-in-java
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