Introduction to Programming

Overriding the equals() method

Now, let's implement the equals() method:

class PersonWithEquals{  private int age;  private String name;  private String hairstyle;  public PersonWithEquals(int age, String name, String hairstyle) {    this.age = age;    this.name = name;

    this.hairstyle = hairstyle;  }  @Override  public boolean equals(Object o) {    if (this == o) return true;    if (o == null || getClass() != o.getClass()) return false;    PersonWithEquals person = (PersonWithEquals) o;    return age == person.age && Objects.equals(name, person.name);  }}

Notice that, while establishing the objects' equality, we ignore the hairstyle field. Another aspect that requires comments is the use of the equals() method of the java.utils.Objects class. Here is its implementation: ...