multithreading - Java. Simple thread operation exchange -

i writing simple java tcp client app. connection handled in thread, , confused, how can process functions in main thread class? should use special static class? or there "scheduler", proccess actions between threads?

/* in main object or thread */ synchronized (someobject) {     someobject.wait(); }  /* in tcp connection thread / object */ synchronized (someobject) {     someobject.notify(); }