update,

it114105/itp3914/Lab12/Ex3/Ex3.java

@@ -0,0 +1,15 @@
+public class Ex3 {
+	public static void main(String [] args) {
+		Student s1=new Student("Ben", 123, 2);
+		System.out.println(s1);
+ 
+		Student s2=new Student("John", 246, 6);
+		System.out.println(s2);
+ 
+		Student os1=new OutstandingStudent("Mary", 456, 3, "academic");
+		System.out.println(os1);
+ 
+		Student os2=new OutstandingStudent("Peter", 567, 7, "sports");
+		System.out.println(os2);
+	}
+}