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Re: Support Map<String, String> & Map<String, MyString>

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On 10/6/11 2:07 PM, albert kao wrote:
> On Oct 6, 4:23 pm, Daniel Pitts<newsgroup.nos...@virtualinfinity.net>
> wrote:
>> On 10/6/11 1:02 PM, Lew wrote:>  albert kao wrote:
>>>> The following programs work but I like to combine MyComboBox&
>>>> MyComboBox2 into one class so that both Map<String, String>    &
>>>> Map<String, MyString>    data types are supported in the single combined
>>>> class.
>>>> How to do that?
>>
>>> Have 'MyString' implement 'CharSequence' and use a 'Map<String,CharSequence>'?
>>
>> Or, if you don't really care about the value type, use Map<String, ?>  as
>> the parameter type.
>>
>> public class MyComboBox {
>>      public MyComboBox(Map<String, ?>  data) {...};
>>
>> }
>>
>> If you *do* care about the type, then make your ComboBox generic:
>>
>> public class MyComboBox<V>  {
>>      public MyComboBox(Map<String, V>  data) {...};
>>
>> }
>>
>>>> public class MyComboBox extends LangComboBox implements
>>>> PropertyChangeListener {
>>>>     protected EventListenerList listenerList = new EventListenerList();
>>>>     private Set keySet = Collections.EMPTY_SET;
>>
>>> DO NOT USE RAW TYPES!
>>
>> Seconded.
>
> Inside the MyComboBox constructor, is there a way to figure out
> whether the type of value of the Map is String or MyString?

Not really, due to type erasure.  It might be helpful if you explain 
*why* you need the two constructors. What do they do differently?

Perhaps you're trying to fit a square peg into a round hole.  What does 
MyString provide that String doesn't?

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Support Map<String, String> & Map<String, MyString> albert kao <albertkao3@gmail.com> - 2011-10-06 12:05 -0700
  Re: Support Map<String, String> & Map<String, MyString> Lew <lewbloch@gmail.com> - 2011-10-06 13:02 -0700
    Re: Support Map<String, String> & Map<String, MyString> Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-10-06 13:23 -0700
      Re: Support Map<String, String> & Map<String, MyString> albert kao <albertkao3@gmail.com> - 2011-10-06 14:07 -0700
        Re: Support Map<String, String> & Map<String, MyString> Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-10-06 15:42 -0700
          Re: Support Map<String, String> & Map<String, MyString> albert kao <albertkao3@gmail.com> - 2011-10-06 17:54 -0700
          Re: Support Map<String, String> & Map<String, MyString> albert kao <albertkao3@gmail.com> - 2011-10-06 18:09 -0700
    Re: Support Map<String, String> & Map<String, MyString> albert kao <albertkao3@gmail.com> - 2011-10-06 13:32 -0700
      Re: Support Map<String, String> & Map<String, MyString> Lew <lewbloch@gmail.com> - 2011-10-06 19:03 -0700
        Re: Support Map<String, String> & Map<String, MyString> albert kao <albertkao3@gmail.com> - 2011-10-06 20:33 -0700
  Re: Support Map<String, String> & Map<String, MyString> Roedy Green <see_website@mindprod.com.invalid> - 2011-10-07 02:41 -0700
    Re: Support Map<String, String> & Map<String, MyString> albert kao <albertkao3@gmail.com> - 2011-10-07 03:49 -0700
      Re: Support Map<String, String> & Map<String, MyString> Roedy Green <see_website@mindprod.com.invalid> - 2011-10-07 10:48 -0700

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