The record class
The record class was added to the SDK in Java 16. It was a long-awaited Java feature. It allows you to avoid writing boilerplate code in a case when you need an immutable class (with getters only), which looks similar to the following Person class (see the Record class in the ch02_oop folder):
final class Person {
    private int age;
    private String name;
    public Person(int age, String name) {
        this.age = age;
        this.name = name;
    }
    public int age() { return age; }
    public String name() { return name; }
    @Override
    public boolean equals(Object o) {
        //implementation not shown for brevity
    ...
