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You explain at https://docs.jboss.org/hibernate/orm/5.0/manual/en-US/html/ch04.html#persistent-classes-equalshashcode how to write equals and hashcode.
Current java versions allow to implement these methods in much shorter and cleaner code using .java.util.Objects.equals() and java.util.Objects.hash().
E.g.
@Override
public boolean equals(Object rhs) { if (this == rhs) return true; /** * A proxy class does not compare well. So we first have to get the real * class */ if (rhs == null || Hibernate.getClass(this) != Hibernate.getClass(rhs)) return false; MyClass that = (MyClass ) rhs; if (!java.util.Objects.equals(fieldname, that.fieldname)) return false; return true; }
@Override
public int hashCode() { return java.util.Objects.hash(fieldname); }
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