@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~