Java – how to give an enumeration “valueof” with a class name?

Suppose I have a simple enum named animal, which is defined as:

public enum Animal {
    CAT,DOG
}

I have a method, such as:

private static Object valueOf(String value,Class<?> classType) {
    if (classType == String.class) {
        return value;
    }

    if (classType == Integer.class) {
        return Integer.parseInt(value);
    }

    if (classType == Long.class) {
        return Long.parseLong(value);
    }

    if (classType == Boolean.class) {
        return Boolean.parseBoolean(value);
    }

    // Enum resolution here

}

What can I put in this method to return my enumeration instance, where value is classtype?

I've seen attempts:

if (classType == Enum.class) {
        return Enum.valueOf((Class<Enum>)classType,value);
    }

But it doesn't work

Solution

Your classtype is not enum, it is animal So,

if (classType.isEnum()) {
    return Enum.valueOf(classType,value);
}

It should work In addition, you should use equals () instead of = = to compare class instances (although = = will work in practice if there is only one class loader)