How to get an enum value from a string value in Java?

Question

Say I have an enum which is just

public enum Blah {
    A, B, C, D
}

and I would like to find the enum value of a string, for example

Answer 1

My 2 cents here: using Java8 Streams + checking an exact string:

public enum MyEnum {
    VALUE_1("Super"),
    VALUE_2("Rainbow"),
    VALUE_3("Dash"),
    VALUE_3("Rocks");

    private final String value;

    MyEnum(String value) {
        this.value = value;
    }

    /**
     * @return the Enum representation for the given string.
     * @throws IllegalArgumentException if unknown string.
     */
    public static MyEnum fromString(String s) throws IllegalArgumentException {
        return Arrays.stream(MyEnum.values())
                .filter(v -> v.value.equals(s))
                .findFirst()
                .orElseThrow(() -> new IllegalArgumentException("unknown value: " + s));
    }
}

** EDIT **

Renamed the function to fromString() since naming it using that convention, you'll obtain some benefits from Java language itself; for example:

1. Direct conversion of types at HeaderParam annotation