update,

it114105/itp3914/Lab12/Ex3/Student.java

@@ -0,0 +1,24 @@
+public class Student {
+	protected String name;
+	protected int stid;   // student id
+	protected int year;
+ 
+	public Student(String name, int stid, int year) {
+		this.name = name;
+		this.stid = stid;
+		setYear(year);
+	}
+ 
+	public void setYear(int year) {
+		if (year>0 && year<=3) 
+			this.year = year;
+		else {
+			System.out.println("Wrong input! Year will be set to 1.");
+			this.year = 1;
+		}
+	}
+ 
+	public String toString() {
+		return "Name: "+name+", Student ID: "+stid+", Year: "+year;
+	}
+}