Java 8 - Cannot invoke stream() on the array type Enum[] [duplicate]

Question

Why I cannot invoke stream() on the array type Enum?

DummyEnum[] array = DummyEnum.values();
array.stream(); // Compile Error

ENUM:

public enum DummyEnum {
    Hello("Hello"), Welcome("Welcome");
    private String greeting;

    private DummyEnum(final String greeting) {
        this.greeting = greeting;
    }

    public String getValue() {
        return greeting;
    }
}

note that DummyEnum.values() creates a new array on each call. That's usually not a problem, but if you're doing it in extremely hot code you might want to cache a single instance in a static field instead. — the8472
– the8472, Commented Oct 13, 2015 at 10:53

Eran · Accepted Answer · 2015-10-13 10:11:14Z

16

Use Stream.of(array). Arrays don't have a stream() method.

answered Oct 13, 2015 at 10:11

Eran

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1 Comment

Holger Over a year ago

Or EnumSet.allOf(DummyEnum.class).stream()…

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