How to synchronize things
<p>I have been wondering this forever. I don't know how things can happen at the same time.</p>

<p>I want to know how to sync in java without separate threads. For example, in a real video game how do things hapen at the same time without separate threads?<br>
How would a person move two limbs at the same time in the game?<br>
How could I do it in java?</p>
