Data-Modelling/SchoolMenuGen.java at master · Anggva/Data-Modelling · GitHub

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/*
    This menu design is not ideal because the try-catch blocks and the menus themselves are
    copy-paste replications of the first menu... I have an interface for a menu. I'll make
    this a lot better tomorrow (11/25).

        -- Frank
 */


import java.util.InputMismatchException;
import java.util.Scanner;

public class SchoolMenuGen implements Menu {

    public void showMainMenu() {

        // main menu

        while (true) {
            System.out.println();
            System.out.println("LOST IN ERWIN");
            System.out.println("--------------");
            System.out.println("1) Student Menu\n" +
                    "2) Faculty Menu\n" +
                    "3) Reporting Menu\n" +
                    "4) Administrative Menu\n" +
                    "5) EXIT\n");

            Scanner option = new Scanner(System.in);
            try {

                byte opt = option.nextByte();

                switch (opt) {

                    case 1:
                        showStudentMenu();
                        break;

                    case 2:  //showFacultyMenu();
                        break;

                    case 3:  //showReportMenu();
                        break;

                    case 4:  //showAdminMenu();
                        break;

                    case 5:
                        System.exit(0);
                        break;

                    default:
                        System.out.println("error: a menu selection specified is" +
                                " out of bounds. Select 1-5.\n\n");

                }

            } catch (InputMismatchException ex) {
                // clear for the next input attempt.
                option.nextLine();
                System.out.println("You did not choose a proper number between 1 and 5. Please" +
                        " try again.");

            }


        }


    }

    private void showStudentMenu() {

        /* Student Menu while loop
        *  reminder! a new while loop is required for
        *  each sub-menu. Is there a better method? */

          while (true) {

            System.out.println("Student Menu");
            System.out.println("\t------------");
            System.out.println("\t1)New Student\n" +
                    "\t2)Courses Needed\n" +
                    "\t3)Preferred Schedule\n" +
                    "\t4)Term Schedule\n" +
                    "\t5)Statistics\n" +
                    "\t6)RETURN to Main Menu");

            Scanner option = new Scanner(System.in);
              try {
                  byte byopt = option.nextByte();

                  switch (byopt) {

                      case 1:
                          System.out.println("Creating new student...\n");
                          break;

                      case 2:
                          System.out.println("Ask DB for courses needed.\n");
                          break;

                      case 3:
                          System.out.println("Ask student for preferred course schedule.\n");
                          break;

                      case 4:
                          System.out.println("Get term schedule for student.\n");
                          break;

                      case 5:
                          System.out.println("Get student stats.\n");
                          break;

                      case 6:
                          System.out.println("Going up to main menu.\n");
                          return;


                      default:
                          System.out.println("error: a menu selection specified is" +
                                  " out of bounds. Select 1-6.\n\n");
                  } // end switch
              } catch (InputMismatchException ex) {
                  // clear for the next input attempt.
                  option.nextLine();
                  System.out.println("You did not choose a proper number between 1 and 6. Please" +
                          " try again.");
              }

        } // end while


        }

    }