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From: =?UTF-8?Q?Arne_Vajh=c3=b8j?= <arne@vajhoej.dk>
Newsgroups: comp.lang.java.programmer
Subject: Re: Java record
Date: Wed, 1 Mar 2023 20:23:03 -0500
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On 3/1/2023 2:18 PM, e.d.pro...@gmail.com wrote:
> I just saw they added a new thing called record to Java 16. Is this not a replacement for a DTO or am I missing something?
> I create a DTO class like:
> public class TestDTO {
> 	private String testField;
> 	public String getTestField() {
> 		return this.testField;
> 	}
> 	public void setTestField(String test) {
> 		this.testField = test;
> 	}
> }
> 
> I define a matching record definition like:
> public record TestRecordDTO(String testField) {
> 
> }

> In web, we use DTOs on the back end to pass data to and from the
> Javascript/Typescript on the front end. It looks like passing to the
> front end works, now how do we use it as a model to get the user
> input?

Records are just a way to create data classes
with less typing.

You can use them just like the equivalent manually created
data classes.

But there are two caveats:
1) they are immutable (only getter, no setter)
2) the getter does not follow Java bean convention - it is
    .xxxx() not .getXxxx()

That may work or may not work with what you need from
your model classes.

Arne