day10-笔记本案例

day10/src/com/inmind/duotai_test12/Laplop.java

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+package com.inmind.duotai_test12;
+//笔记本类，包含运行功能、关机功能、使用USB设备功能
+public class Laplop {
+    public void powerOn(){
+        System.out.println("笔记本开机");
+    }
+
+    public void powerOff(){
+        System.out.println("笔记本关机");
+    }
+
+    public void useUSB(Usb usbDevice) {
+        usbDevice.open();
+        //加上类型判断，是鼠标就点，是键盘就敲
+        if (usbDevice instanceof Mouse) {
+            Mouse mouse = (Mouse) usbDevice;
+            mouse.click();
+        }
+        if (usbDevice instanceof KeyBoard) {
+            KeyBoard keyBoard = (KeyBoard)usbDevice;
+            keyBoard.knock();
+        }
+
+        usbDevice.close();
+    }
+}