Use a Java record for Greeting class

Author: sdeleuze

README.adoc

@@ -90,8 +90,7 @@ The `id` field is a unique identifier for the greeting, and `content` is the tex
 representation of the greeting.
 
 To model the greeting representation, create a resource representation class. To do so,
-provide a plain old Java object with fields, constructors, and accessors for the `id` and
-`content` data, as the following listing (from
+provide a Java record class for the `id` and `content` data, as the following listing (from
 `src/main/java/com/example/restservice/Greeting.java`) shows:
 
 [source,java]

complete/src/main/java/com/example/restservice/Greeting.java

@@ -1,20 +1,3 @@
 package com.example.restservice;
 
-public class Greeting {
-
-	private final long id;
-	private final String content;
-
-	public Greeting(long id, String content) {
-		this.id = id;
-		this.content = content;
-	}
-
-	public long getId() {
-		return id;
-	}
-
-	public String getContent() {
-		return content;
-	}
-}
+public record Greeting(long id, String content) { }