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View Code? Open in Web Editor NEWThis repository is created for getting experience on new features coming since Java-9.
This repository is created for getting experience on new features coming since Java-9.
https://www.yegor256.com/2017/10/03/java9.html
https://vividcode.io/5-things-made-easier-in-java-9/
https://alidg.me/blog/2016/12/30/least-significant-bits-of-java-9
Herbirince çok güzel özellikler anlatılmış:
2. linkte
Resource Reference kullanımında kolaylık
Optional.stream() new method
final long count = Stream.of(
Optional.of(1),
Optional.empty(),
Optional.of(2)
).flatMap(Optional::stream)
.count();
assertEquals(2, count);
private interface methods
dateOfRelease.entrySet().stream()
.flatMap(s -> Stream.ofNullable(s.getValue()))
.collect(Collectors.toList()).forEach(System.out::println);
için dateOfRelease map'ine value'su null olan bir entry koyman gerekiyor. Bu listede sadece key'i null olan bir tane entry var zaten onu stream ederkende null olması ile ilgilenmiyor.
Mesela:
dateOfRelease.put("Java 15", null);
yaptığın durumda
Java 8'de
dateOfRelease.entrySet().stream()
.flatMap(s -> s.getValue().stream())
.collect(Collectors.toList()).forEach(System.out::println);
NullPointerException verecekti.
Birde java 8'de neydi Java 9 ile ne olduyuda göstermekte fayda var.
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