Class can define specific behavior for start, stop, pause, and continue commands, as well as behavior to take when the system shuts down.

 
  • 類(lèi)中的處理導出其實(shí)現,它們就可以定義開(kāi)始、停止、暫停和繼續命令的特定行為以及在關(guān)閉系統時(shí)所采取的行為。
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