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Thread: this is easy for those who know java!!

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    Thumbs up this is easy for those who know java!!

    Hello,i am having difficulty of finding the right approach of my problem.(noobAlert!)

    I have a FOR loop and inside i calculate a float number and add it in a vector.
    Every iteration of the loop corrisponds to a float number and a name(string).
    After the loop i find the min value of this vector,and my problem is that i cant find a way to "connect" it to the correspoding string.

    I have the impression that it is a stupid question,and that i m searching probably in the wrong places, nevertheless i really need some help here!thnx for your attention..


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    Super Moderator Norm's Avatar
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    Default Re: this is easy for those who know java!!

    What do you do with the Strings that are created in the loop? If you put the created Float values into a Vector, where do you save the Strings? Can you put the Strings into another Vector at the same time so the corresponding Strings and Float values are at the same relative locations in their Vectors and you can use the same index value to get each from its Vector.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: this is easy for those who know java!!

    There is already a vector containing Items(=strings) ,and i created another vector for the float numbers.
    Every Item corresponds to a float number which is the result of a ranking algorithm.
    I simply want to get the minValue and its corrisponding Item.:-)

  4. #4
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    Default Re: this is easy for those who know java!!

    If you have two parallel Vectors:String and Float. If you get the index of a value in one Vector, the same index used in the other Vector will get the corresponding value.
    Think of writing in two columns on a piece of paper. If you find a desired value on a row in one column, its corresponding value will be on the same row in the other column.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: this is easy for those who know java!!

    ok i know you are right but it didnt work for me,and i think i know why.
    when i declare the Item inside the loop it shows me a warning(local variable hides a field!)..is this the problem?

    for (int j = 0; j < energySource.size(); j++) {
                        Item sourceItem = (Item) energySource.elementAt(j);
                        if (supply.description.isACover(sourceItem.description)) {
                            if (reasoner.checkCompatibility(supply.description, sourceItem.description)) {
     
                                int RPOT = reasoner.rankPotential(supply.description, sourceItem.description);
                                rSRC = alfaSRC * RPOT;
                            } else {
                                SemanticDescription[] contract = reasoner.contraction(sourceItem.description, supply.description);
                                int RPOT = reasoner.rankPotential(contract[1], sourceItem.description);
                                int RPAR = reasoner.rankPartial(contract[0], sourceItem.description);
                                rSRC = alfaSRC * RPOT + betaSRC * RPAR;
                            }
     
                            rTOT1 = (alfaTOT * rSRC + betaTOT * rSRC) / depthSrc;                          //the float number for ranking
                            totVector.add(rTOT1);
     
     
     
                            if (rTOT1 < minScore) {
                                minScore = rTOT1;
                                bestFunct = supply;
                                bestIndex = j;
                            }
     
                            System.out.println(supply.name + " + " + sourceItem.name + "    >>>rTOT1 " + rTOT1);
     
                        } else {
                            candidati.removeElementAt(j);
                            j--;
                        }
     
     
                    }
     
                    //rTOT1min=>minValue of totVector
                    Object rTOT1min = Collections.min(totVector);
                    Float bestRank = (float) rTOT1min;  
                    System.out.println("  Best Rank : " + bestRank + " Source chosen : " + sourceItem.name);

    **the sourceItem is supposed to be a global variable
    Last edited by speaker; March 27th, 2012 at 08:18 PM.

  6. #6
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    Default Re: this is easy for those who know java!!

    what variable is hiding what field?
    it didnt work for me,
    Do you keep the Vectors in parallel? How do you search the Vector?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: this is easy for those who know java!!

    Quote Originally Posted by Norm View Post
    what variable is hiding what field?

    Do you keep the Vectors in parallel? How do you search the Vector?
    i posted the code.i hope it helps.
    the vectors are declared together,if that is what you ask me:-)

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    Default Re: this is easy for those who know java!!

    If you add elements to the Vectors at the same time, one to each and do not change one without changing the other then it should work.
    Can you explain what the problem is?

    Partial code is no use in solving the compiler problem.

    I just saw that you added a comment on the first post.
    Was that the hidden variable?
    Why not use a different name for the new, local variable so the class variable is not hidden?
    Last edited by Norm; March 27th, 2012 at 08:34 PM.
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    Default Re: this is easy for those who know java!!

    you are absolutely right. I will change the variable's name as you said .Parallelism is needed,but its difficult to be achieved.
    It is compiled but i dont get the correct corresponding values ,so ill try to create new parallel vectors .

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    Default Re: this is easy for those who know java!!

    Hello,
    Would a hashMap be a solution?

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    Default Re: this is easy for those who know java!!

    It could.
    What would the keys and values be?
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