这是一个小型的学生信息管理系统

				/**
				  文件：Student.java
				  说明：说明学生的类文件
				**/
				//导入相关类文件
				import java.text.*;
				import java.util.*;
				public class Student extends Person{
					// 学号
					public String Sno;     
					// 院系名称
					public String Department; 
					// 入学日期
					public Date EnrollmentDate;
					// 构造方法1
					public Student(String IID,String Iname,String Isex,	Date IbrithDate,String ISno,String IDepartment,	Date IEnrollmentDate)
					{
						super(IID, Iname, Isex, IbrithDate);
						this.Sno = ISno;
						this.Department = IDepartment;
						this.EnrollmentDate = IEnrollmentDate;
					}
					// 构造方法2
					public Student(String ISno, String Iname, String Isex, String IDepartment, Date IEnrollmentDate)
					{
						super(null, Iname, Isex, null);
						this.Sno = ISno;
						this.Department = IDepartment;
						this.EnrollmentDate = IEnrollmentDate;
					}
					public String getSno()
					{
						return Sno;
					}
					public String getDepartment()
					{
						return Department;
					}
					public String getEnrollmentDate()
					{
						String strDate = EnrollmentDate.toString();
						SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
						String CNtime = fmt.format(EnrollmentDate);
				        return CNtime;
					}		
				}