Using synchronised and j.u.c aren't mutually incompatible. It's quite easy to use synchronised to conservatively control access to the state of a single object,

Using synchronised and j.u.c aren't mutually incompatible. It's quite easy to use synchronised to conservatively control access to the state of a single object, and often that's all you need. It can affect performance depending on your access patterns, but it's not like synchronised is deprecated or anything. When was the last time you saw wait/notify? I'm willing to bet that was a long time ago.