do
{
  char choice = Text.readChar("1. Add tenant" + 
                             "\n2. list tenants" + 
                             "\n3. exit");

  switch (choice) 
  {
    case '1':
      {
         System.out.println("1");
      }
      break;
    case '2':
      {
         System.out.println("2");
      }
      break;
    case '3':
      break;
    default:
      {
        Text.showMessage("Invalid choice");
      }
      break;
} while (choice != '3')
System.exit(0);