package org.kodejava.commons.lang; public class ObjectHashCodeDemo { public static void main(String[] args) { Book book1 = new Book(1L, “Spring Boot in Action”, “Craig Walls”); Book book2 = new Book(2L, “Docker in Action”, “Jeff Nickoloff”); Book book3 = book1; System.out.println(“book1.hashCode() = ” + book1.hashCode()); System.out.println(“book2.hashCode() = ” + book2.hashCode()); System.out.println(“book3.hashCode() = ” + book3.hashCode()); } } package … Continue reading How to implement the hashCode and equals method using Apache Commons?