Typesafe Tagged Union in Java using Scott Encoding

Match.java

// public domain
import java.util.function.Function;
interface Either<A, B> {
    <C> C match(Function<A, C> left, Function<B, C> right);
}

class Left<A, B> implements Either<A, B> {
    final A get;
    Left(A get) {
        this.get = get;
    }
    public <C> C match(Function<A, C> left, Function<B, C> right) {
        return left.apply(get);
    }
}

class Right<A, B> implements Either<A, B> {
    final B get;
    Right(B get) {
        this.get = get;
    }
    public <C> C match(Function<A, C> left, Function<B, C> right) {
        return right.apply(get);
    }
}

public class Match {
    public static void main(String[] args) {
        Either<String, Integer> item = new Right<String, Integer>(5);
        String normalized = item.match(x -> x, x -> x.toString());
    }
}