Getting all names in an enum as a String[]

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Here’s one-liner for any enum class:

public static String[] getNames(Class<? extends Enum<?>> e) {
    return Arrays.stream(e.getEnumConstants()).map(Enum::name).toArray(String[]::new);
}

Pre Java 8 is still a one-liner, albeit less elegant:

public static String[] getNames(Class<? extends Enum<?>> e) {
    return Arrays.toString(e.getEnumConstants()).replaceAll("^.|.$", "").split(", ");
}

That you would call like this:

String[] names = getNames(State.class); // any other enum class will work

If you just want something simple for a hard-coded enum class:

public static String[] names() {
    return Arrays.toString(State.values()).replaceAll("^.|.$", "").split(", ");
}

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