What steps need to be taken to implement overriding the hashCode method in a class?

To correctly implement the hashCode method in a class, you should:

1. Choose the fields that influence object equality (usually the same ones used in equals).
2. Use a stable and efficient hash code calculation algorithm that considers the selected fields.
3. Follow the contract between equals and hashCode: if two objects are equal according to equals, their hashCode must be the same.

Example of overriding hashCode:

@Override
public int hashCode() {
    int result = 17;
    result = 31 * result + (field1 != null ? field1.hashCode() : 0);
    result = 31 * result + (field2 != null ? field2.hashCode() : 0);
    return result;
}

Where field1 and field2 are the fields involved in object comparison. You can use Objects.hash(field1, field2) for simplification.