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Menu.java
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Menu.java
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import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
class Menu {
List<MenuItem> items = new ArrayList<>();
String title;
public Menu(String title) {
this.title = title;
}
public void addItem(MenuItem item) {
items.add(item);
}
public void display() {
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.println(title);
for (int i = 0; i < items.size(); i++) {
System.out.println((i + 1) + ". " + items.get(i).label);
}
System.out.print("Choose an option (or 0 to exit): ");
// TODO handle non-integer input with try-catch
int choice = scanner.nextInt();
if (choice == 0) break;
if (choice > 0 && choice <= items.size()) {
MenuItem selectedItem = items.get(choice - 1);
if (selectedItem.subMenu != null) {
selectedItem.subMenu.display();
} else {
selectedItem.func_to_run.run();
}
} else {
System.out.println("Invalid option. Try again.");
}
}
}
}