JavaBeans has certain downsides in addition to its positives. For starters, JavaBeans are changeable. Therefore, they lack the benefits of immutable objects, and the JavaBeans design makes making a class immutable difficult. As a result, JavaBeans beans may be readily tampered with and are not permanent. Partway through its development, a JavaBean will be in an inconsistent state, and it allows for inconsistency while requiring mutability. This turns out to be a significant drawback for most users, as changing beans might cause class disruption and modify the code's aim.