import java.io.*;
import java.util.Scanner;
public class OptionMenu {

public static void main(String [] args){

ProjectPortfolios portfolios = new ProjectPortfolios();
ProjectShareHolders shareholders = new ProjectShareHolders();
ProjectShares shares = new ProjectShares();

Scanner in = new Scanner(System.in);

while (true) {
   // Display the menu
   System.out.println("1\t Trade Shares");
   System.out.println("2\t Portfolio Report");
   System.out.println("3\t Exit");
   System.out.println("4\t Save");
   System.out.print("Please enter your choice: ");
   //Get user's choice
   int choice = Integer.parseInt(in.nextLine());
   //Display the title of the chosen module
   switch (choice) {
   case 1:
      System.out.print("Enter customer ID: ");
      int customerID = Integer.parseInt(in.nextLine());
      ShareHolders shareholder = null;
      for (int i = 0; i < shareholders.getShareHolders().size(); i++) {
         if (shareholders.getShareHolders().get(i).getCustomerID() == customerID) {
         shareholder = shareholders.getShareHolders().get(i);
         }
      }
      if (shareholder == null) {
         System.out.println("Shareholder not found");
         break;
      }
      System.out.print("Enter share code to trade: ");
      String shareCode = in.nextLine();
      Shares share = null;
      for (int i = 0; i < shares.getShares().size(); i++) {
         if (shares.getShares().get(i).getshareCode().equals(shareCode)) {
         share = shares.getShares().get(i);
         }
      }
      if (share == null) {
         System.out.println("Share stock not found");
         break;
      }
      System.out.println("Options:");
      System.out.println("1\t Buy Shares");
      System.out.println("2\t Sell Shares");
      System.out.print("Select choice: ");
      int choice2 = Integer.parseInt(in.nextLine());
      if (choice2 != 1 && choice2 != 2) {
         System.out.println("Invalid choice");
         break;
      }

1.Trade Shares - when this menu option is selected the following ac...