Using Vectors

bluefloyd8 · by **bluefloyd8** » Tue Mar 04, 2008 8:29 am

Im coming over from C to Java so I dont know a lot about vectors. But im trying to make a dynamic array using vectors and it isnt working.

Is the following incorrect to use:

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Using java Syntax Highlighting

Vector ParsedSiteInfoVector = new Vector();
 
ParsedSiteInfo x = new ParsedSiteInfo();
 
this.ParsedSiteInfoVector.addElement((ParsedSiteInfo) x);
 
public ParsedSiteInfo getParsedData(int i) {
 
         // return this.parsedInfo[i];
 
         ParsedSiteInfo t;
 
         t = (ParsedSiteInfo) ParsedSiteInfoVector.elementAt(sites-1);
 
         return t;
 
}
Parsed in 0.033 seconds,  using GeSHi 1.0.8.4

Thank you for any help

plusminus · by **plusminus** » Tue Mar 04, 2008 1:30 pm

Hello bluefloyd,

I usually work with ArrayLists. You should also use Generics (in C++ called Templates..?) for compiletime Type-safety.

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Using java Syntax Highlighting

ArrayList<ParsedSiteInfo> parsedSiteInfos = new ArrayList<ParsedSiteInfo>();
 
ParsedSiteInfo x = new ParsedSiteInfo();
 
this.parsedSiteInfos.add(x);
 
public ParsedSiteInfo getParsedData(int i) { // i isn't used ?
 
         // return this.parsedInfo[i]; <-- this was your C code ?
 
      return parsedSiteInfos.get(sites-1);
 
}
Parsed in 0.032 seconds,  using GeSHi 1.0.8.4

Btw: you didn't say what is not working.

Regards,
plusminus

bluefloyd8 · by **bluefloyd8** » Tue Mar 04, 2008 9:36 pm

I wrote that code from memory. Ignore sites and use 'i' instead.

The problem is the vector is empty; even after I call AddItem() several times.

plusminus · by **plusminus** » Wed Mar 05, 2008 12:01 pm

Hello bluefloyd,

I'd smash my nuts, if this does not work:

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Using java Syntax Highlighting

        ArrayList<Object> objList = new ArrayList<Object>();
 
        objList.add(new Object());                                              
 
        Object o = objList.get(0);
Parsed in 0.039 seconds,  using GeSHi 1.0.8.4

Regards,
plusminus

bluefloyd8 · by **bluefloyd8** » Wed Mar 05, 2008 4:46 pm

I got it working with ArrayList instead of Vector.
thanks +-

plusminus · by **plusminus** » Wed Mar 05, 2008 5:00 pm

You saved me

bluefloyd8 · by **bluefloyd8** » Wed Mar 05, 2008 11:17 pm

Errr. wait. no it didnt work. Smash your nuts!

(kidding)

Using Vectors

Using Vectors

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