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

Kotlin Solution

Create an extension and then call valueOf("value"). If the type is invalid, you'll get null and have to handle it

inline fun > valueOf(type: String): T? {
    return try {
        java.lang.Enum.valueOf(T::class.java, type)
    } catch (e: Exception) {
        null
    }
}

Alternatively, you can set a default value, calling valueOf("value", MyEnum.FALLBACK), and avoiding a null response. You can extend your specific enum to have the default be automatic

inline fun > valueOf(type: String, default: T): T {
    return try {
        java.lang.Enum.valueOf(T::class.java, type)
    } catch (e: Exception) {
        default
    }
}

Or if you want both, make the second:

inline fun > valueOf(type: String, default: T): T = valueOf(type) ?: default