I've got 40 years C experience, mostly with device drivers and OS internals (helped port Linux to the SH-4 back in 2000). I retired a few years back (thank you Qualcomm), and learned Java to scratch ...

Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions. Programmers frequently need to ...