クラス java.util.Objectsのおさらいメモ - Qiita

public class Employee { private Long id; private String name; public Employee(Long id, String name) { this.id = id; this.name = name; } @Override public String toString() { return "Employee{" + "id=" + id + ", name='" + name + '\'' + '}'; } // getter/setterは省略 } Employee emp1 = new Employee(100L, "rubytomato"); Employee emp2 = new Employee(200L, "garnetpepper"); System.out.println(Objects.compare(