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gyselph/Optional.java

Created January 15, 2021 13:46
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Java 7 to 15: Optional
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Optional.java
Optional.of(new Random().nextInt(10))
.filter(i -> i % 2 == 0)
.map(i -> "number is even: " + i)
.ifPresent(System.out::println);
> number is even: 6
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