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The Art of Java Language Pattern Matching by Simon Ritter
Java's Pattern Matching abilities, from switch expressions to records and arrays, simplified code and streamlining results.
- Pattern matching is coming to Java, with support for switch expressions and statements.
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Pattern matching uses the
instanceofkeyword to test if an object is an instance of a certain class. - Pattern matching can be used with records, which are a new type of class introduced in Java 14.
- Records can have constructor parameters and use them directly, without the need for explicit assignment.
- Pattern matching can also be used with arrays, but it is more limited than with records.
- Guarded patterns can be used to test if an object is an instance of a certain class and has certain properties.
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The
casestatement can be used with multiple values, such as an array of primitives. -
The
matchstatement is not actually a statement, but rather a way of writing a single expression that can handle multiple cases. - Pattern matching can be used to simplify code and reduce the number of lines needed to achieve a certain result.
- Records can implement interfaces, just like ordinary classes.
- Pattern matching is not limited to just testing if an object is an instance of a certain class, but can also be used to test if an object has certain properties.
- Pattern matching is not limited to just checking if an object is an instance of a certain class, but can also be used to test if an object has certain properties.
- Pattern matching can be used to simplify code and reduce the number of lines needed to achieve a certain result.
-
The
switchstatement can be used with multiple values, such as an array of primitives. - Pattern matching is not limited to just testing if an object is an instance of a certain class, but can also be used to test if an object has certain properties.
-
The
matchstatement is not actually a statement, but rather a way of writing a single expression that can handle multiple cases. - Pattern matching can be used to simplify code and reduce the number of lines needed to achieve a certain result.
- Records can implement interfaces, just like ordinary classes.
- Pattern matching is not limited to just checking if an object is an instance of a certain class, but can also be used to test if an object has certain properties.