tryphonebook.java

Java Classic Examples是我买的两本书：《JAVA经典实例》和《java入门经典源代码》里边附送光盘里带的源码

class TryPhoneBook
{
  public static void main(String[] args)
  {
    PhoneBook book = new PhoneBook();                 // The phone book
    FormattedInput in = new FormattedInput();         // Keyboard input
    Person someone;

    for(;;)
    {
      System.out.println("Enter 1 to enter a new phone book entry\n"+
                         "Enter 2 to find the number for a name\n"+
                         "Enter 3 to list all the entries\n" +
                         "Enter 4 to quit.");

      int what = in.intRead();
      switch(what)
      {
        case 1:
          book.addEntry(BookEntry.readEntry());
          break;
        case 2:
          someone = Person.readPerson();
          BookEntry entry = book.getEntry(someone);
          if(entry == null)
            System.out.println("The number for "+someone +
                             " was not found. ");
          else           
            System.out.println("The number for "+someone +
                             " is " + book.getEntry(someone).getNumber());
          break;
        case 3:
          book.listEntries();
          break;
        case 4:
          book.save();
          System.out.println("Ending program.");
          return;
        default:
          System.out.println("Invalid selection, try again.");
          break;
      }
    }
  }
}