package ch2;

public class Student02 implements Comparable<Student02> {
        private String studentID, studentName;
        private int age;
        public Student02(String studentID,String studentName,int age){
            this.studentID=studentID;
            studentName=studentName;
            this.age=age;
        }
        public int compareTo(Student02 o){
            return this.studentID.compareTo(o.studentID);
        }
        public String toString(){
            return "("+studentID+","+studentName+","+age+")";
        }
    }