Java overriding parent equals method -

i have 2 classes person , teacher. in person class check if 2 objects passed in equal using compareto method. in teacher class, problem i'm working on states need override equals method in person. in equals method, way return true if it's equal in both equals method in person , teacher. question is, when check in teacher's equals method, call super.equals(other) in order check if 2 objects equal parent class or there else need do?

person:

public class person implements comparable<person> {       public boolean equals(object other) {         try {             return this.compareto(other) == 0;         }catch(exception e) {             return false;         }     } } 

teacher

public class teacher extends person {     private string facultyid;     @override     public boolean equals(object other) {         boolean personequals = super.equals(other);         try {             teacher teach1 = (teacher)other;             boolean idequals = this.facultyid.equals(teach1.facultyid);             if(idequals && personequals)                 return true;             return false;         }catch(exception e) {             return false;         }     } } 

basically, contract of object#equals states:

it symmetric: non-null reference values x , y, x.equals(y) should return true if , if y.equals(x) returns true

and implementation of teacher#equals doesn't meet requirement. cases when implementing equals method in class inherits not object e.g. teacher, should verify if type of object compared the same as class you're comparing. achieve this, should use getclass().equals:

public class teacher extends person {     private string facultyid;     @override     public boolean equals(object other) {         //this line nonsense, not persons teachers         //boolean personequals = super.equals(other);          //avoid using try-catch         //try {          //verify other object not null         if (other == null) {             return false;         }          //verify other object teacher, not super or subclass of         if (this.getclass().equals(other.getclass()) {             //here comes real check             teacher otherteacher = (teacher)other;             return this.facultyid.equals(otherteacher.facultyid);         }         return false;     } } 

do similar person in case should not allow comparing against subclasses of it.