Rhombus java interface

Question

I have two java rhombus classes that implement a Rhombus interface.

Both have an empty constructor and Another constructor that recieves 3 parameters(lower rhombus angle , vertical diagonal , center Point)

One class has two fields: bottom point and left point.
The other has three fields that are exactly as the constructor.

My issue is Everything works great .
I just have one tester that tries both Equals methods
"Rhombus1.equals(rhombus2)

I tried making the equals method compare anything I could think of and it still failed.
All other getter methods of both classes work.

(Already searched google, youtube so please dont tell me to go to google)

Question is: what do I need to compare in here? Why is the tester failing me

Do I need to use hashcode ( havent really used it before)

Answer 1

Yes, you must also implement the hashCode method.
Some guidance:
https://www.baeldung.com/java-equals-hashcode-contracts