Fact about hashCode() in Java

Hash code method returns integer. If range of integer finishes then also two different object will have same hashCode. So it is not necessary that two different object will have same hashCode are equal.So, If the two objects have same name, then they would be equal, but still if their string field has different length, then their hashCodes will be different.

That is why, you should always use the same fields in equals and hashCode calculation.