Question

How would this switch statement be modified to not use "continue"?

This piece of code is part of a larger assignment and that assignment prohibits the use of "continue" for switch statements. How do I modify this code so that it still does what I want it to do, without using "continue"?

while (true) {
choice = displayMenu(keyboard);
switch (choice) {
case 'D':
case 'd': {
courseStudents.displayStudentList();
  
continue;
}
case 'A':
case 'a': {
int id;
double stGpa;
System.out.println("Enter id number of student to add:");
id=keyboard.nextInt();
System.out.println("Enter GPA of student to add:");
gpa=keyboard.nextDouble();
courseStudents.addStudent(id, gpa);
  
continue;
}
case 'C':
case 'c': {
int id;
double StGpa;
System.out.println("Enter id number of student whose GPA will change:");
id=keyboard.nextInt();
System.out.println("Enter new GPA for student:");
gpa=keyboard.nextDouble();
courseStudents.changeStudentGpa(id, gpa);
  
continue;
}
case 'S':
case 's': {
courseStudents.showHighestGpaStudents();
  
continue;
}
case 'U':
case 'u': {
String file = courseNum + "update.txt";
courseStudents.writeUpdatedFile(file);
  
continue;
}
case 'E':
case 'e': {

continue;
}

}
break;
}

Each case represents a menu option for entering data into a program:

MENU

D - Display student list

A - Add a student to list

C - Change a student GPA

S - Show highest GPA students

U - Update student data file

E - Exit program

The user needs be able to make a choice (for example, D) and after that choice is made, be prompted again for another choice, like S, until they exit by entering E.

Thank you and please let me know if there is any missing information!

Answer 1

Screenshot

Program

import java.util.Scanner;

public class SwitchCheck {

   public static void main(String[] args) {
       Scanner keyboard=new Scanner(System.in);
       char choice=' ';
       double gpa;
       int id;
       double StGpa;
       choice = displayMenu(keyboard);
       while (choice!='E'&& choice!='e') {
           switch (choice) {
               case 'D':
               case 'd':
                    //courseStudents.displayStudentList();
                    break;
          
           case 'A':
           case 'a':
               System.out.println("Enter id number of student to add:");
                id=keyboard.nextInt();
                System.out.println("Enter GPA of student to add:");
                gpa=keyboard.nextDouble();
                keyboard.nextLine();
                //courseStudents.addStudent(id, gpa);
                break;
          
           case 'C':
           case 'c':
               System.out.println("Enter id number of student whose GPA will change:");
                id=keyboard.nextInt();
                System.out.println("Enter new GPA for student:");
                gpa=keyboard.nextDouble();
                keyboard.nextLine();
                //courseStudents.changeStudentGpa(id, gpa);          
                break;
          
           case 'S':
           case 's':
                //courseStudents.showHighestGpaStudents();          
                break;
          
           case 'U':
           case 'u':
                //String file = courseNum + "update.txt";
                //courseStudents.writeUpdatedFile(file);          
                break;
           default:
                break;
           }
           choice = displayMenu(keyboard);
       }
   }
public static char displayMenu(Scanner keyboard) {
   System.out.println("MENU:");
   System.out.println("D - Display student list\r\n" +
           "\r\n" +
           "A - Add a student to list\r\n" +
           "\r\n" +
           "C - Change a student GPA\r\n" +
           "\r\n" +
           "S - Show highest GPA students\r\n" +
           "\r\n" +
           "U - Update student data file\r\n" +
           "\r\n" +
           "E - Exit program");
   System.out.print("Enter your choice: ");
  
   char ch=keyboard.nextLine().charAt(0);
   return ch;
}
}

---------------------------------------------------

Output

MENU:
D - Display student list

A - Add a student to list

C - Change a student GPA

S - Show highest GPA students

U - Update student data file

E - Exit program
Enter your choice: d
MENU:
D - Display student list

A - Add a student to list

C - Change a student GPA

S - Show highest GPA students

U - Update student data file

E - Exit program
Enter your choice: e

----------------------------------------------------

Note:-

You have to use choice as loop exit,then it will work.

Replace your program with the above program