update:demo4

com/study/demo4/TestControl.java

@@ -0,0 +1,31 @@
+package com.study.demo4;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TestControl {
+  public static void main(String[] args) {
+    HomeController controller = new HomeController();
+
+    // 创建设备
+    SmartLight light = new SmartLight("Living Room Light");
+    SmartAirConditioner ac = new SmartAirConditioner("Bedroom AC");
+    SmartMasher masher = new SmartMasher("Kitchen Masher");
+
+    // 添加到控制器
+    controller.addDevice(light);
+    controller.addDevice(ac);
+    controller.addDevice(masher);
+
+    // 测试设备状态
+    light.turnOff();
+    ac.turnOff();
+    masher.turnOn();
+
+    // 查询状态
+    System.out.println(controller.getDeviceStatus("Living Room Light"));
+    System.out.println(controller.getDeviceStatus("Bedroom AC"));
+    System.out.println(controller.getDeviceStatus("Kitchen Masher"));
+    System.out.println(controller.getDeviceStatus("Non-existent Device"));
+  }
+}