Overriding equals() ＆ hashCode() in sub classes … considering super fields

problem ：

Is there a specific rule on how Overriding equals() & hashCode() in sub classes considering super fields ?? in consideration of Super field , Is there a question about how to In subclass rewrite equals() and hashCode() Specific rules for ？knowing that there is many parameters : super fields are private/public , with/without getter ... I know there are many parameters ： Super fields are private / Public , Yes / nothing getter ...

For instance, Netbeans generated equals() & hashCode() will not consider the super fields ... and for example ,Netbeans Generated equals（）＆hashCode（） Super fields will not be considered ... and

    new HomoSapiens("M", "80", "1.80", "Cammeron", "VeryHot").equals(    new HomoSapiens("F", "50", "1.50", "Cammeron", "VeryHot"))

will return true :( Will return true :(

public class Hominidae {    public String  gender;    public String  weight;    public String  height;    public Hominidae(String gender, String weight, String height) {        this.gender = gender;        this.weight = weight;        this.height = height;    }    ... }public class HomoSapiens extends Hominidae {    public String name;    public String faceBookNickname;    public HomoSapiens(String gender, String weight, String height,                        String name, String facebookId) {        super(gender, weight, height);        this.name = name;        this.faceBookNickname = facebookId;    }    ...  }

If you want to see the Netbeans generated equals() & hashCode() : If you want to see Netbeans Generated equals（） and hashCode（）：

public class Hominidae {    ...    @Override    public boolean equals(Object obj) {        if (obj == null) {            return false;        }        if (getClass() != obj.getClass()) {            return false;        }        final Hominidae other = (Hominidae) obj;        if ((this.gender == null) ? (other.gender != null) : !this.gender.equals(other.gender)) {            return false;        }        if ((this.weight == null) ? (other.weight != null) : !this.weight.equals(other.weight)) {            return false;        }        if ((this.height == null) ? (other.height != null) : !this.height.equals(other.height)) {            return false;        }        return true;    }    @Override    public int hashCode() {        int hash = 5;        hash = 37 * hash + (this.gender != null ? this.gender.hashCode() : 0);        hash = 37 * hash + (this.weight != null ? this.weight.hashCode() : 0);        hash = 37 * hash + (this.height != null ? this.height.hashCode() : 0);        return hash;    }}public class HomoSapiens extends Hominidae {    ...    @Override    public boolean equals(Object obj) {        if (obj == null) {            return false;        }        if (getClass() != obj.getClass()) {            return false;        }        final HomoSapiens other = (HomoSapiens) obj;        if ((this.name == null) ? (other.name != null) : !this.name.equals(other.name)) {            return false;        }        if ((this.faceBookNickname == null) ? (other.faceBookNickname != null) : !this.faceBookNickname.equals(other.faceBookNickname)) {            return false;        }        return true;    }    @Override    public int hashCode() {        int hash = 7;        hash = 89 * hash + (this.name != null ? this.name.hashCode() : 0);        hash = 89 * hash + (this.faceBookNickname != null ? this.faceBookNickname.hashCode() : 0);        return hash;    }}

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Solution ：

Reference resources ： https://stackoom.com/en/question/8fhN