Rust Result Emulation

Result.java

public class Result<T, E> {
    T t;
    E e;

    private Result() {
    }

    public static <T, E> Result<T, E> ok(T ok) {
        var teResult = new Result<T, E>();
        teResult.t = ok;
        return teResult;
    }

    public static <T, E> Result<T, E> err(E err) {
        var teResult = new Result<T, E>();
        teResult.e = err;
        return teResult;
    }

    public <U> U match(Function<T, U> ok, Function<E, U> err) {
        if (ok != null) {
            return ok.apply(this.t);
        } else {
            return err.apply(this.e);
        }
    }
}