调度算法只调度等待运行的进程。
再说一遍，用JAVA做一些调度算法，但问题是我在互联网上找到的所有例子都不能回答我的问题，所以我没有其他地方可以问，所以我发了这个帖子：
如果我有3的量子时间，并且处理：
Name - ArrivalTime - BurstTime
P0 - 0 - 5
P1 - 6 - 5
P2 - 6 - 9
P3 - 8 - 2
因此，我没有发现任何例子涵盖这一点，如果过程P1还没有到来，但量子结束了呢？所以P0在3毫秒内执行，还有2毫秒，量子已经结束，P1还没有到达。程序是等待P1，还是完成P0，仍有1ms的等待时间（直到P1到达）？
一种执行方式可能是：
T0 : Waiting Process = [P0] ; Executed Process = P0(1-2-3)
T3 : Waiting Process = [P0] ; Executed Process = P0(4-5) => P0 finished
T5 : Waiting Process = [] ; Executed Process = Nothing
T6 : Waiting Process = [P1, P2] ; Executed Process = P1(1-2-3)
T9 : Waiting Process = [P2, P3, P1] ; Executed Process = P2(1-2-3)
T12 : Waiting Process = [P3, P1, P2] ; Executed Process = P3(1-2) => P3 finished
T14 : Waiting Process = [P1, P2] ; Executed Process = P1(4-5) => P1 finished
T16 : Waiting Process = [P2] ; Executed Process = P2(4-5-6)
T19 : Waiting Process = [P2] ; Executed Process = P2(7-8-9) => P2 finished
在T3上，只有P0在等待运行，因此它将在下一段时间内执行。