equals问题解答

@Data
@Accessors(chain = true)
public class Species {
    public String name;
    public Integer age;
    public Boolean sex;
}


@Data
public class Person extends Species {
    private String address;
    private String phoneNumber;

    @Override
    public String toString() {
        return String.format("address:%s,phoneNumber:%s,name:%s,age:%s,sex:%s", address, phoneNumber, name, age, sex);
    }
}

public class Test {
    public static void main(String[] args) {
        List<Person> personList = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            Person person = new Person();
            person.setName("tom" + i);
            person.setAge(20 + i);
            //person.setPhoneNumber("1352343212"+i);
            //person.setAddress(String.format("杭州%s区", i));
            person.setSex(i % 2 == 0);

            personList.add(person);
        }

        personList.forEach(o -> {
            System.out.println(String.format("%s-%s", o.toString(), personList.indexOf(o)));
        });
    }
}

 

各位大神，截图中的 o.equals(elementData[i]) 为啥会相等，按理比较两个对象的内容 o对象的name,age和elementData[i]都不一样；求解~