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Is there a specific rule on how Overriding equals() & hashCode() in sub classes considering super fields ?? knowing that there is many parameters : super fields are private/public , with/without getter ... For instance, Netbeans generated equals() & hashCode() will not consider the super fields ... and new HomoSapiens("M", "80", "1.80", "Cammeron", "VeryHot").equals( new HomoSapiens("F", "50", "1.50", "Cammeron", "VeryHot")) 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() : 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 f

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