public void run() {
DatabaseContainer db = new DatabaseContainer();
MyScanner sc = new MyScanner();
System.out.println(":::::::::::::::::::::::::::::::");
System.out.println("Welcome to the database system!");
int choice = 0;
while (choice != 4) {
printMainMenu();
choice = sc.nextInt("\nEnter your choice: ", 1, 4);
if (choice == 1) {
String fileName =
sc.nextLine("Enter a name for your new database file (eg. something.db)", 3, 50);
boolean valid = db.create(fileName);
while (!valid) {
fileName = sc.nextLine("That file already exists, please enter another", 3, 50);
valid = db.create(fileName);
}
System.out.println("Database created!");
} else if (choice == 2) {
if (!db.isEmpty()) {
System.out.println("Here is a list of existing files: ");
db.printFileNames();
String fileName = sc.nextLine("\nEnter the name of a valid database to open: ", 3, 50);
boolean valid = db.open(fileName);
while (!valid) {
fileName = sc.nextLine("That filename does not exist, please try another.", 3, 50);
valid = db.create(fileName);
}
useOpenMenu(db, sc);
} else {
System.out.println("There is currently no existing database files.");
}
} else if (choice == 3) {
if (!db.isEmpty()) {
System.out.println("Here is a list of existing files: ");
db.printFileNames();
String fileName = sc.nextLine("\nEnter the name of a valid database to delete: ", 3, 50);
boolean valid = db.delete(fileName);
while (!valid) {
fileName = sc.nextLine("That filename does not exist, please try another.", 3, 50);
valid = db.delete(fileName);
}
} else {
System.out.println("There is currently no existing database files.");
}
System.out.println("Database deleted!");
}
}
}
