The sad thing is all JavaBeans needed was named arguments to the constructor rather than relying on setter names. It's a lot more complicated for every class to

The sad thing is all JavaBeans needed was named arguments to the constructor rather than relying on setter names. It's a lot more complicated for every class to let instances be created in a mostly-uninitialized state, relying on a bunch of setter calls in an unspecified order to make the instance actually usable. For one thing, there's no language-supported way to make a setter mandatory, you can't do any better than blowing up at runtime if it wasn't called.