java教务管理系统（eclipse）

import javax.swing.*; import java.util.*; public class SystemTest{ public static void main(String args[]) { Scanner sc = new Scanner(System.in); int identity = 0; Student stu; Lecture lec; String name; String id; String classes; String class_reg; String courses_name; TopManage administrator; administrator = new TopManage(); List<String> Chooseclassid = new LinkedList<String> (); int admin_choose; int stu_choose; int i; while(identity != -1) { System.out.println("Class System\n"); System.out.println("Your identity(1-administrator,2-student,-1-exit)\n"); identity = sc.nextInt(); admin_choose = 0; stu_choose = 0; while(identity == 1 && admin_choose != 6) { System.out.println("Choices of administrator:(1-Add Students 2-Delete Students 3-Find Students 4-See class Choices 5-Register Grades 6-Exit)\n"); admin_choose = sc.nextInt(); switch(admin_choose) { case 1: System.out.println("Student Name:"); sc.nextLine(); name = sc.nextLine(); System.out.println(name); System.out.println("Student id:"); id = sc.nextLine(); System.out.println("Student class:"); classes = sc.nextLine(); stu = new Student(name, id, classes); administrator.StudentAdd(stu); break; case 2: System.out.println("Student name:"); sc.nextLine(); name = sc.nextLine(); System.out.println("Student id:"); id = sc.nextLine(); System.out.println("Student class:"); classes = sc.nextLine(); stu = new Student(name, id, classes); administrator.DeleteStudents(stu); break; case 3: System.out.println("Student id:"); sc.nextLine(); id = sc.nextLine(); stu = administrator.searchStudent(id); if(stu == null) System.out.println("Not found\n"); else { System.out.println("Student Name:"); System.out.println(stu.getName()); System.out.println("Student Class:"); System.out.println(stu.getclass()); System.out.println("Student Lectures and Grades:"); stu.printgrades(); } break; case 4: System.out.println("Class Name:"); sc.nextLine(); class_reg = sc.nextLine(); Chooseclassid = administrator.searchClassChoose(class_reg); break; case 5: System.out.println("Class Name:"); sc.nextLine(); class_reg = sc.nextLine(); Chooseclassid = administrator.searchClassChoose(class_reg); administrator.LogGrades(Chooseclassid, class_reg); break; default: break; } } i = 1; while(identity==2) { System.out.println("Please enter your id:(5 to exit)\n"); if(i==1) { sc.nextLine(); i = 2; } id = sc.nextLine(); stu = administrator.searchStudent(id); if(id.equals(Integer.toString(5))) break; else { if(stu == null) System.out.println("Not found!\n"); else { stu_choose = 0; while(stu_choose!=5) { System.out.println("Choices of Students:(1-Add courses 2-Delete courses 3-Show Grades Chart 4-Search grades 5-Exit)\n"); stu_choose = sc.nextInt(); switch(stu_choose) { case 1: System.out.println("Please enter the name of one course:\n"); sc.nextLine(); courses_name = sc.nextLine(); lec = new Lecture(courses_name, Integer.toString(0)); administrator.DeleteStudents(stu); stu.Addlectures(lec); administrator.StudentAdd(stu); break; case 2: System.out.println("Please enter the name of one course:\n"); sc.nextLine(); courses_name = sc.nextLine(); lec = new Lecture(courses_name, Integer.toString(0)); administrator.DeleteStudents(stu); stu.Deletelectures(lec); administrator.StudentAdd(stu); break; case 3: System.out.println("Your grades for all courses are as follows:\n"); i = 1; stu.printgrades(); break; case 4: stu.searchgrades(); i = 1; break; default: i = 1; break; } } } } } } } }