Hi I have created this class (ExampleClass as Ségio told me) but and I don't
know how i can see the content the List with the position. I have put this but
it return an error
for (int i = 0; i < listToSort.size(); i++) {
System.out.println(listToSort.get(i));
}
Sérgio Costa <[EMAIL PROTECTED]> escribió:
This first class should be you domain object.
You should add all related data here.
public class ExampleClass implements Comparable {
public String astrName;
/*
* All other members you need here
*
*/
public ExampleClass(String astrName) {
this.astrName = astrName;
}
public int compareTo(Object arg0) {
ExampleClass obj=(ExampleClass) arg0;
return astrName.compareTo(obj.astrName);
}
}
After you have this done, sorting a list of object is as simple as:
public class ExampleMain {
public static void main(String[] args) {
List listToSort= new ArrayList();
listToSort.add(new ExampleClass("here's one"));
listToSort.add(new ExampleClass("here's another"));
listToSort.add(new ExampleClass("just one more"));
Collections.sort(listToSort);
//the list is sorted
}
}
Notice the type checking to make sure you don't put anything other than your
class on your list.
If you're not using Java 5.0, remove the from the list
declaration.
On 6/27/06, password password wrote:
>
> Please, can you put an example? I don't know how put the compareTo Method
> in my servlet.
>
> Sérgio Costa escribió: Put them in a list and
> Collections.sort() them.
>
> All you'll need to do is create a Class with all those fields implementing
> Comparable, and implement the compareTo Method.
>
> hope it helps
> SC
>
> On 6/26/06, password password wrote:
> >
> > Hi,
> >
> > I have a servlet and in this servlet I have a problem when sort an
> > array. If in Tomcat 5.5.4 (on windows) the order is very fast (about 2
> > seconds) , but in tomcat 5.5.9 is slower (about 25 seconds). I don't
> Know
> > why the same code has diferent time.
> > The code is the next. The array has 7000 elements.
> >
> >
> //////////////////////////////////////////////////////////////////////////////////////////////////////////
> > java.util.Date datTiempoInicio, datTiempoFin;
> > java.util.Calendar calTiempoInicio = Calendar.getInstance();
> > java.util.Calendar calTiempoFin = Calendar.getInstance();
> > long intTiempoUtilizado;
> > datTiempoInicio = new java.util.Date();
> > calTiempoInicio.setTime(datTiempoInicio );
> >
> > if (astrName.length > 1) {
> > //ordenacion de los arrays: astrName[intFilaArray]
> > int i, pasadas;
> > String strTemp;
> > double dblIntensityTemp;
> > double dblBackgroundTemp;
> > int intComparacion;
> > for (pasadas = 1; pasadas < astrName.length; pasadas++) {
> > for (i = 0; i> intComparacion = astrName[i].compareTo(astrName[i+1]);
> > if (intComparacion > 0) {
> > strTemp = astrName[i];
> > astrName[i] = astrName[i + 1];
> > astrName[i + 1] = strTemp;
> > dblIntensityTemp = adblIntensity1[i];
> > adblIntensity1[i] = adblIntensity1[i + 1];
> > adblIntensity1[i + 1] = dblIntensityTemp;
> > dblIntensityTemp = adblIntensity2[i];
> > adblIntensity2[i] = adblIntensity2[i + 1];
> > adblIntensity2[i + 1] = dblIntensityTemp;
> > dblBackgroundTemp = adblBackground1[i];
> > adblBackground1[i] = adblBackground1[i + 1];
> > adblBackground1[i + 1] = dblBackgroundTemp;
> > dblBackgroundTemp = adblBackground2[i];
> > adblBackground2[i] = adblBackground2[i + 1];
> > adblBackground2[i + 1] = dblBackgroundTemp;
> > } // end if (intComparacion > 0)
> > } //end for i
> > } //end for pasadas
> >
> > } // end if (astrName.length > 1)
> >
> > datTiempoFin = new java.util.Date();
> > calTiempoFin.setTime(datTiempoFin );
> >
> > intTiempoUtilizado = Math.abs( (calTiempoFin.getTimeInMillis() -
> > calTiempoInicio.getTimeInMillis()) / (1000) );
> > System.out.println("(ProcessFile) Time = " + intTiempoUtilizado );
> >
> >
> ////////////////////////////////////////////////////////////////////////////////////////////////
> >
> >
> > Can You help me?
> >
> >
> >
> > ---------------------------------
> >
> > LLama Gratis a cualquier PC del Mundo.
> > Llamadas a fijos y móviles desde 1 céntimo por minuto.
> > http://es.voice.yahoo.com
> >
>
>
>
> ---------------------------------
>
> LLama Gratis a cualquier PC del Mundo.
> Llamadas a fijos y móviles desde 1 céntimo por minuto.
> http://es.voice.yahoo.com
>
---------------------------------
LLama Gratis a cualquier PC del Mundo.
Llamadas a fijos y móviles desde 1 céntimo por minuto.
http://es.voice.yahoo.com
