How Do You Implement Equal

Override the Equals method of Object class in the Reference Type.Override the GetHashCode method of Object class in the Reference Type.Implement overloads for == and != operator for the type.

How do you implement an equal method?

1. Make sure to override equals(Object) so our method is always called.
2. Include a self and null check for an early return in simple edge cases.
3. Use getClass to allow subtypes their own implementation (but no comparison across subtypes) or use instanceof and make equals final (and subtypes can equal).

How do we implement hashCode () and equals ()?

The hashCode() contract If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the equals(java.