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Re: Something Better than ArrayList

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On Tue, 21 Jun 2011 02:22:46 -0700 (PDT), Paul Cager
<paul.cager@googlemail.com> wrote:

>On Jun 21, 6:34 am, Gene Wirchenko <ge...@ocis.net> wrote:
>> Dear Java'ers:
>>      The name of the class is what I need.  I assume I can find the
>> docs once I know what it is called.
>
>Others have already pointed you to java.util.Map, which answers your
>immediate question. You might also want to have a look at the Java
>"Collections" tutorial for more general information:
>http://download.oracle.com/javase/tutorial/collections/index.html

     I found it rather dry, but did manage to write a proof-of-concept
program for a symbol table.  However, I have to check for duplication
before put()ing.  Is there a way to combine a Map and a Set to avoid
this?

     For the Map

   static Map<String,String> SymbolTable=new HashMap<String,String>();

I would like to write something like

   static boolean TryToAdd
    (
    String theKey,
    String theData
    )
      {
      return SymbolTable.put(theKey,theData);
      }

instead of

   static boolean TryToAdd
    (
    String theKey,
    String theData
    )
      {
      if (SymbolTable.containsKey(theKey))
         return false;
      else
         {
         SymbolTable.put(theKey,theData);
         return true;
         }
      }

     Am I missing something or is this not supported?

Sincerely,

Gene Wirchenko

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Thread

Something Better than ArrayList Gene Wirchenko <genew@ocis.net> - 2011-06-20 22:34 -0700
  Re: Something Better than ArrayList Donkey Hottie <donkey@fredriksson.dy.fi> - 2011-06-21 09:55 +0300
    Re: Something Better than ArrayList Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-06-21 09:00 +0000
      Re: Something Better than ArrayList Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-06-21 10:48 +0000
        Re: Something Better than ArrayList Tom Anderson <twic@urchin.earth.li> - 2011-06-21 22:57 +0100
  Re: Something Better than ArrayList Paul Cager <paul.cager@googlemail.com> - 2011-06-21 02:22 -0700
    Re: Something Better than ArrayList Gene Wirchenko <genew@ocis.net> - 2011-06-21 14:19 -0700
      Re: Something Better than ArrayList Tom Anderson <twic@urchin.earth.li> - 2011-06-21 22:56 +0100
        Re: Something Better than ArrayList Gene Wirchenko <genew@ocis.net> - 2011-06-21 16:39 -0700
  Re: Something Better than ArrayList Gene Wirchenko <genew@ocis.net> - 2011-06-21 07:51 -0700

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