Thinking outside the box

0001-01-01 1 min read

Stream.toList()

Unresolved directive in <stdin> - include::../../../../../../../../src/main/java/sixteen/api/StreamApi.java[tag=toList]

0001-01-01 1 min read

The following describes selected improvements of the Java language. See the Java 16 release notes. See Java Language Updates for Java SE 16.

With JEP 394, Pattern Matching for instanceof introduced in {java14} is moving from preview state to final availability.

With JEP 395, Record introduced in {java14} is moving from preview state to final availability.

0001-01-01 1 min read

Pattern Matching For Instanceof

Unresolved directive in <stdin> - include::../../../../../../../../src/main/java/sixteen/lang/PatternMatchingForInstanceof.java[tag=patternMatchingForInstanceof]

Pattern matching eliminates a required type conversion (type cast).

0001-01-01 1 min read

See https://docs.oracle.com/en/java/javase/16/language/records.html

Record

Unresolved directive in <stdin> - include::../../../../../../../../src/main/java/sixteen/lang/Record.java[tag=record]

A record is implicitly final,
has a canonical constructor equal to the header,
has a toString(), equals(), and hashCode() method.
Each member has an accessor method, e.g x() or y().

Compact Canonical Constructor

0001-01-01 1 min read

To Unmodifiable List

Unresolved directive in <stdin> - include::../../../../../../../../src/main/java/ten/api/CollectorsApi.java[tag=toUnmodifiableList]

With Collectors.toUnmodifiableList() we can now convert a list into an immutable list.

To Unmodifiable Set

Unresolved directive in <stdin> - include::../../../../../../../../src/main/java/ten/api/CollectorsApi.java[tag=toUnmodifiableSet]

With Collectors.toUnmodifiableSet() we can now convert a set into an immutable set.

0001-01-01 1 min read

Copy Of

Unresolved directive in <stdin> - include::../../../../../../../../src/main/java/ten/api/ListApi.java[tag=copyOf]

With List.copyOf we can now create an immutable copy of a list.

0001-01-01 1 min read

Copy Of

Unresolved directive in <stdin> - include::../../../../../../../../src/main/java/ten/api/MapApi.java[tag=copyOf]

With Map.copyOf we can now create an immutable copy of a list.

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