怎么做 Java 中的 C# return 语句

Question

I will like to know if there is a way to do the second or third return statement in Java

Example using C#:

I have this class with properties

class Properties
{
    public int ResponseCode { get; set; }

    public string ResponseMessage { get; set; }

    public string Name { get; set; }

    public string Academics { get; set; }
}

I did it like this at the beginning:

    public static Properties CreateStudentFirstWay()
    {
        Properties properties = new Properties();
        properties.Name = "Michael";
        properties.Academics = "Information";
        properties.ResponseCode = 0000;
        properties.ResponseMessage = "Created";
        return properties;
    }

I use this from time to time

    public static Properties CreateStudentSecondWay()
    {
        Properties properties = new Properties()
        {
            Name = "Michael",
            Academics = "Information",
            ResponseCode = 0000,
            ResponseMessage = "Created"
        };

        return properties;
    }

And recently I have been doing it like this

    public static Properties CreateStudentThirdWay()
    {
        return new Properties()
        {
            Name = "Michael",
            Academics = "Information",
            ResponseCode = 0000,
            ResponseMessage = "Created"
        };
    }

We are able to do the last one in C# without a constructor, without a builder or even without the need to populate all the properties in the class.

Is there a way to accomplished this in Java without the need of a constructor or the builder?

Thanks!

Answer 1

Java does not support this syntax; you have to use a variable and call the various set methods. Groovy does have a syntax that provides this:

public static Properties createStudent() {
    return new Properties(
        name: "Michael",
        academics: "Information",
        responseCode: 0,
        responseMessage: "created"
    )
}

but if you want to do this with Java you'll need either a constructor with arguments or a builder. Lombok's @AllArgsConstructor can generate one for you.