lab 9 close #7

lab/lab9/Question4/Door.java

@@ -0,0 +1,54 @@
+/*
+ * Author: CHEN Yongyuan (Walter) 1930006025 from OOP(1007)
+ * Date: 2022-04-21
+ * Description: This is the class of Door.
+ */
+
+public class Door {
+	/**
+	 * Indicator of whether the door is open or not. Default is closed
+	 */
+	private boolean isOpen;
+
+	/**
+	 * Constructor.
+	 */
+	public Door() {
+		isOpen = false;
+	}
+
+	/**
+	 * Get whether the door is open or not.
+	 *
+	 * @return true if the door is open, false otherwise
+	 */
+	public boolean isOpen() {
+		return isOpen;
+	}
+
+	/**
+	 * Open the door.
+	 */
+	public void open() {
+		isOpen = true;
+	}
+
+	/**
+	 * Close the door.
+	 */
+	public void close() {
+		isOpen = false;
+	}
+
+	/**
+	 * Test.
+	 */
+	public static void testDoor() {
+		Door d = new Door();
+		System.out.println(d.isOpen() == false);
+		d.close();
+		System.out.println(d.isOpen() == false);
+		d.open();
+		System.out.println(d.isOpen() == true);
+	}
+}