Lab 4

lab/lab4/Question4/Student.java

@@ -0,0 +1,82 @@
+/*
+ * Author: CHEN Yongyuan (Walter) 1930006025 from OOP(1007)
+ * Date: 2022-03-10
+ * Description: Student class
+ */
+
+public class Student {
+
+    /*
+     * Student's ID number
+     */
+    private int ID;
+
+    /*
+     * whether the student is currently sleeping or not, default is false
+     */
+    private boolean sleeping;
+
+    /**
+     * Constructor. Initialize the ID number and sleeping status as false.
+     * 
+     * @param ID, the ID number of the student
+     */
+    public Student(int ID) {
+        this.ID = ID;
+        this.sleeping = false;
+    }
+
+    /**
+     * Getter of the ID number.
+     *
+     * @return the ID number of the student
+     */
+    public int getID() {
+        return this.ID;
+    }
+
+    /**
+     * Identify whether the student is sleeping or not.
+     *
+     * @return true if the student is sleeping, false otherwise
+     */
+    public boolean isSleeping() {
+        return this.sleeping;
+    }
+
+    /**
+     * Make the student fall in sleep.
+     *
+     * @return void
+     */
+    public void fallAsleep() {
+        this.sleeping = true;
+    }
+
+    /**
+     * Walkup the student.
+     *
+     * @return void
+     */
+    public void wakeUp() {
+        this.sleeping = false;
+    }
+
+    /**
+     * Test student class.
+     */
+    public static void testStudent() {
+        Student s = new Student(1234567890);
+
+        System.out.println(s.getID() == 1234567890);
+        System.out.println(s.isSleeping() == false);
+        s.fallAsleep();
+        System.out.println(s.isSleeping() == true);
+        s.fallAsleep();
+        System.out.println(s.isSleeping() == true);
+        s.wakeUp();
+        System.out.println(s.isSleeping() == false);
+        s.wakeUp();
+        System.out.println(s.isSleeping() == false);
+    }
+}