OnJava8-Examples/collections/BasicRecord.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// collections/BasicRecord.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// {NewFeature} Since JDK 16

import java.util.*;

record Employee(String name, int id) {}

public class BasicRecord {

public static void main(String[] args) {

var bob = new Employee("Bob Dobbs", 11);

var dot = new Employee("Dorothy Gale", 9);

// bob.id = 12; // Error:

// id has private access in Employee

System.out.println(bob.name()); // Accessor

System.out.println(bob.id()); // Accessor

System.out.println(bob); // toString()

// Employee works as the key in a Map:

var map = Map.of(bob, "A", dot, "B");

System.out.println(map);

}

/* Output:

Bob Dobbs

Employee[name=Bob Dobbs, id=11]

{Employee[name=Dorothy Gale, id=9]=B, Employee[name=Bob Dobbs, id=11]=A}