EQUALSVERIFIER | Application case sharing of the application normal jar framework

EQUALSVERIFIER is a Java framework for generating and verifying Equals and HashCode methods.It provides a simple and powerful way to check the correctness of the class of Equals and HashCode methods.This article will share the application cases of Equalsverifier in generating and verifying the Normal Jar framework. The Normal Jar framework refers to ordinary Java projects that do not use any special tools or frameworks.In this project, we usually need to manually implement the Equals and Hashcode methods to ensure the comparison of the object and the correctness of the hash code calculation.Equalsverifier makes this process easier and efficient. First, we need to add an EqualSverifier library to the project's dependence.You can complete dependency management through Maven or Gradle. Next, let's see a specific application case.Suppose we have a class called Person, which has two attributes: name and Age.We want to generate and verify the Equals and HashCode methods. public class Person { private String name; private int age; // Construct function, Getter, and Setter method @Override public int hashCode() { return Objects.hash(name, age); } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null || getClass() != obj.getClass()) { return false; } Person other = (Person) obj; return Objects.equals(name, other.name) && age == other.age; } } First of all, we need to import the EQUALSVERIFIER library in the test class: import nl.jqno.equalsverifier.EqualsVerifier; Then, we can use Equalsverifier to generate and verify the Equals and HashCode methods: @Test public void testEqualsAndHashCode() { EqualsVerifier.forClass(Person.class).verify(); } After running the test method, Equalsverifier will automatically generate a set of test cases and check the correctness of the Equals and HashCode methods.If a problem is found, it will throw the corresponding abnormalities and point out the problem. Using Equalsverifier, we can easily ensure that the Equals and HashCode methods follow the requirements of standard contracts, thereby reducing the workload of manual writing test cases and verification.This is very useful for the Normal Jar framework, especially when dealing with complex object relationships. To sum up, Equalsverifier is a convenient and easy -to -use Java framework to generate and verify the Equals and HashCode methods.Its application cases in the Normal JAR framework are quite extensive, which can save developers' time and energy.I hope this article will be able to understand the application and usage of equalsverifier.