public static void main(String[] args) {
ArrayList<Human> myArr = new ArrayList<Human>();
Scanner scan = new Scanner(System.in);
while (true) {
showMenu();
int choice;
i = new Scanner(System.in);
choice = i.nextInt();
switch (choice) {
case 0:
System.out.println("Do you want to exit ? (Y/N)");
String ex = scan.nextLine();
if (ex.equals("Y") || ex.equals("y")) {
i.close();
scan.close();
System.exit(0);
}
break;
case 1:
System.out.println("Please enter the student name :");
String a = scan.nextLine();
System.out.println("Please enter the student age :");
String b = scan.nextLine();
System.out.println("Please enter the student city :");
String c = scan.nextLine();
System.out.println("Please enter the student id :");
String d = scan.nextLine();
System.out.println("Please enter the courses grades :");
String e = scan.nextLine();
Double doubleE = Double.valueOf(e);
Student y = new Student(a, b, c, d, doubleE);
myArr.add(y);
System.out.println("Student added successfully.");
break;
case 2:
System.out.println("Please enter the instructor name :");
String aa = scan.nextLine();
System.out.println("Please enter the instructor age :");
String bb = scan.nextLine();
System.out.println("Please enter the instructor city :");
String cc = scan.nextLine();
System.out.println("Please enter the instructor courses :");
String dd = scan.nextLine();
System.out.println("Please enter the salary :");
String ee = scan.nextLine();
Double doubleEE = Double.valueOf(ee);
Instructor x = new Instructor(aa, bb, cc, dd, doubleEE);
myArr.add(x);
System.out.println("Instructor added successfully.");
break;
case 3:
System.out.println("Please enter the student id :");
String searchString = scan.nextLine();
for (Iterator<Human> it = myArr.iterator(); it.hasNext(); ) {
Student z = (Student) it.next();
if ((z.getId().equals(searchString))) {
if (z instanceof Student) {
it.remove();
System.out.println("Student removed successfully.");
break;
}
}
}
break;
case 4:
System.out.println("Please enter the instructors name :");
String searchStringI = scan.nextLine();
for (Iterator<Human> it = myArr.iterator(); it.hasNext(); ) {
Human zz = (Human) it.next();
if (zz.getName().equals(searchStringI)) {
if (zz instanceof Instructor) {
it.remove();
System.out.println("Instructor removed successfully.");
break;
}
}
}
break;
case 5:
System.out.println("");
System.out.println("**List of Students**");
for (Human q : myArr) {
if (q instanceof Student) {
System.out.println(q);
}
}
break;
case 6:
System.out.println("");
System.out.println("**List of Instructors**");
for (Human qq : myArr) {
if (qq instanceof Instructor) {
System.out.println(qq);
}
}
break;
case 7:
System.out.println("");
System.out.println("**List of All University People**");
for (Human qqq : myArr) {
System.out.println(qqq);
}
break;
}
if (choice != 0) continue;
}
}
