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Hello Hello
**hello**
ive created two vectors parallely ,one for strings and one for floats.Every string corresponds to a float.Thii is done inside a FOR loop. After the loop i calculate the min of floats and i need to get the corresponding string ,but unfortunately i dont get the correct string.
Is my approach wrong,or should i continue experimenting towards this solution?
(I m trying to do this using a hashmap too)
Re: Hello Hello
Hello speaker!
Can you post your code?
Re: Hello Hello
Please explain what you are doing and show the code that is accessing the two Vectors. If the Vectors are parallel, then an index used with each Vector's get method will return the corresponding elements.dont get the correct string.
Is this the same question:
http://www.javaprogrammingforums.com...know-java.html
Why start another post for the same question
If you don't understand my answer, don't ignore it, ask a question.
Re: Hello Hello
yes this is me! i use an index as you say ,but it returns the values only if executed inside the for loop.Originally Posted by Norm
Re: Hello Hello
Not true.returns the values only if executed inside the for loop.
You do not need to use a loop to get elements from a Vector. You can call its methods anywhere in your code.
If you don't understand my answer, don't ignore it, ask a question.
speaker (March 28th, 2012)
Re: Hello Hello
ok..the loop is done in order to put float values into one vector,and string values to another vector.
after the loop i find easily the min value of the float vector,but i still cant associate it with the correct string.
Re: Hello Hello
When you find the index for the float value in one Vector, then use that same index to get the corresponding String from the other Vector.
If you don't understand my answer, don't ignore it, ask a question.
Re: Hello Hello
Vector src =new Vector(); Vector totVector=new Vector(); for (int j = 0; j < energySource.size(); j++) { Item sourceItem = (Item) energySource.elementAt(j); //i get Items from energySource vector if (supply.description.isACover(sourceItem.description)) { if (reasoner.checkCompatibility(supply.description, sourceItem.description)) { .......... } else { ........... } //rTOT1 is a float number rTOT1 = (alfaTOT * rSRC + betaTOT * rSRC) / depthSrc; if (rTOT1 < minScore) { minScore = rTOT1; bestFunct = supply; bestIndex = j; } src.add(sourceItem);//add items to new vector, parallel of totVector totVector.add(rTOT1);//add floats to totVector System.out.println(supply.name + " + " + sourceItem.name + ">>>rTOT1 " + rTOT1); } else { candidati.removeElementAt(j); j--; } } Object rTOT1min = Collections.min(totVector); //find the min of totVector Float bestRank = (float) rTOT1min; //casting?! System.out.println(" Best Rank : " + bestRank ); //printing this minValue
and my problem is that after printing the minValue ,i have to get the sorresponding Item.
how do i get i find the correct index outside the loop?
Last edited by speaker; March 29th, 2012 at 01:13 PM.
Re: Hello Hello
Can you explain what the problem is with using the same index in two Vectors?
Post the output from your code and explain what is wrong with it.
If you don't understand my answer, don't ignore it, ask a question.
Re: Hello Hello
so,i thought i should add something like this :
Item newItem = (Item) src.elementAt(totVector.indexOf(rTOT1min)) ; <-------inside the parenthesis goes the index ,correct?
System.out.println("source chosen: "+newItem.name);
Re: Hello Hello
What happens when you compile and execute that code?
what value does the indexOf() method return? Make a separate statement and print out the value returned.
If you don't understand my answer, don't ignore it, ask a question.
Re: Hello Hello
well it seems to be working like this,but after a number of loops i get an ArrayOutOfBoundsException after a few loops
heres the output
###### CALCOLO SCORE ###### AirCondition_A_Cooling + coffee_request>>>>>rTOT=0.25 AirCondition_A_Cooling + ENEL >>>rTOT1 0.55 AirCondition_A_Cooling + EolicGenerator1KW >>>rTOT1 0.53846157 AirCondition_A_Cooling + Photovoltaic_16mq >>>rTOT1 0.8148148 AirCondition_A_Cooling + Photovoltaic_30mq >>>rTOT1 0.6 AirCondition_A_Cooling + SolarCollector2mq >>>rTOT1 0.7619048 AirCondition_A_Cooling + SolarCollector4mq >>>rTOT1 0.7058824 source chosen: EolicGenerator1KW Best Rank : 0.53846157 RankTotal is : 0.3365385 AirCondition_A_Heating + coffee_request>>>>>rTOT=0.25 AirCondition_A_Heating + ENEL >>>rTOT1 0.55 AirCondition_A_Heating + EolicGenerator1KW >>>rTOT1 0.53846157 AirCondition_A_Heating + Photovoltaic_16mq >>>rTOT1 0.8148148 AirCondition_A_Heating + Photovoltaic_30mq >>>rTOT1 0.65 AirCondition_A_Heating + SolarCollector2mq >>>rTOT1 0.7619048 AirCondition_A_Heating + SolarCollector4mq >>>rTOT1 0.7058824 source chosen: EolicGenerator1KW Best Rank : 0.53846157 RankTotal is : 0.3365385 Coffeemachine_Brewing + coffee_request>>>>>rTOT=0.0 Coffeemachine_Brewing + ENEL >>>rTOT1 0.55 Coffeemachine_Brewing + EolicGenerator1KW >>>rTOT1 0.53846157 Coffeemachine_Brewing + Photovoltaic_16mq >>>rTOT1 0.8148148 Coffeemachine_Brewing + Photovoltaic_30mq >>>rTOT1 0.65 Coffeemachine_Brewing + SolarCollector2mq >>>rTOT1 0.7619048 Coffeemachine_Brewing + SolarCollector4mq >>>rTOT1 0.64705884 source chosen: EolicGenerator1KW Best Rank : 0.53846157 RankTotal is : 0.16153848 DishWasher_A_Intensive60C + coffee_request>>>>>rTOT=0.275 DishWasher_A_Intensive60C + ENEL >>>rTOT1 0.6 DishWasher_A_Intensive60C + EolicGenerator1KW >>>rTOT1 0.5769231 DishWasher_A_Intensive60C + Photovoltaic_16mq >>>rTOT1 0.8148148 DishWasher_A_Intensive60C + Photovoltaic_30mq >>>rTOT1 0.675 DishWasher_A_Intensive60C + SolarCollector2mq >>>rTOT1 0.7619048 DishWasher_A_Intensive60C + SolarCollector4mq >>>rTOT1 0.74509805 source chosen: EolicGenerator1KW Best Rank : 0.53846157 RankTotal is : 0.35403848 DishWasher_A_Normal60C + coffee_request>>>>>rTOT=0.275 DishWasher_A_Normal60C + ENEL >>>rTOT1 0.55 DishWasher_A_Normal60C + EolicGenerator1KW >>>rTOT1 0.46153846 DishWasher_A_Normal60C + Photovoltaic_16mq >>>rTOT1 0.8148148 DishWasher_A_Normal60C + Photovoltaic_30mq >>>rTOT1 0.65 DishWasher_A_Normal60C + SolarCollector2mq >>>rTOT1 0.7619048 DishWasher_A_Normal60C + SolarCollector4mq >>>rTOT1 0.6862745 Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 29 >= 7 at java.util.Vector.elementAt(Vector.java:470) at poliba.sisinflab.HomeReasonerWithEnergy.main(HomeReasonerWithEnergy.java:289) Java Result: 1 BUILD SUCCESSFUL (total time: 5 seconds)
Re: Hello Hello
what value does the indexOf() method return? Make a separate statement and print out the value returned.
If you don't understand my answer, don't ignore it, ask a question.
Re: Hello Hello
hmmmm..it gives me a the min Float number..i thought it would give me an integer
Re: Hello Hello
Can you show what was printed out. And the code that was used.
What indexOf() method are you using. Most versions of that method return an int value.
If you don't understand my answer, don't ignore it, ask a question.
Re: Hello Hello
ok im sorry im panicking here..i get an integer which denotes the index
Re: Hello Hello
You need to add some printlns to debug what the code is doing to get the exception. Print out the value of the float number and the value returned by the indexOf() method just before the statement that causes the error.
If you don't understand my answer, don't ignore it, ask a question.
Re: Hello Hello
###### CALCOLO SCORE ###### AirCondition_A_Cooling + coffee_request>>>>>rTOT=0.25 AirCondition_A_Cooling + ENEL >>>rTOT1 0.55 AirCondition_A_Cooling + EolicGenerator1KW >>>rTOT1 0.53846157 AirCondition_A_Cooling + Photovoltaic_16mq >>>rTOT1 0.8148148 AirCondition_A_Cooling + Photovoltaic_30mq >>>rTOT1 0.6 AirCondition_A_Cooling + SolarCollector2mq >>>rTOT1 0.7619048 AirCondition_A_Cooling + SolarCollector4mq >>>rTOT1 0.7058824 integer=1 source chosen: EolicGenerator1KW Best Rank : 0.53846157 RankTotal is : 0.3365385 AirCondition_A_Heating + coffee_request>>>>>rTOT=0.25 AirCondition_A_Heating + ENEL >>>rTOT1 0.55 AirCondition_A_Heating + EolicGenerator1KW >>>rTOT1 0.53846157 AirCondition_A_Heating + Photovoltaic_16mq >>>rTOT1 0.8148148 AirCondition_A_Heating + Photovoltaic_30mq >>>rTOT1 0.65 AirCondition_A_Heating + SolarCollector2mq >>>rTOT1 0.7619048 AirCondition_A_Heating + SolarCollector4mq >>>rTOT1 0.7058824 integer=1 source chosen: EolicGenerator1KW Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 29 >= 7 Best Rank : 0.53846157 RankTotal is : 0.3365385 Coffeemachine_Brewing + coffee_request>>>>>rTOT=0.0 Coffeemachine_Brewing + ENEL >>>rTOT1 0.55 Coffeemachine_Brewing + EolicGenerator1KW >>>rTOT1 0.53846157 Coffeemachine_Brewing + Photovoltaic_16mq >>>rTOT1 0.8148148 Coffeemachine_Brewing + Photovoltaic_30mq >>>rTOT1 0.65 Coffeemachine_Brewing + SolarCollector2mq >>>rTOT1 0.7619048 Coffeemachine_Brewing + SolarCollector4mq >>>rTOT1 0.64705884 integer=1 source chosen: EolicGenerator1KW Best Rank : 0.53846157 RankTotal is : 0.16153848 DishWasher_A_Intensive60C + coffee_request>>>>>rTOT=0.275 DishWasher_A_Intensive60C + ENEL >>>rTOT1 0.6 DishWasher_A_Intensive60C + EolicGenerator1KW >>>rTOT1 0.5769231 DishWasher_A_Intensive60C + Photovoltaic_16mq >>>rTOT1 0.8148148 DishWasher_A_Intensive60C + Photovoltaic_30mq >>>rTOT1 0.675 DishWasher_A_Intensive60C + SolarCollector2mq >>>rTOT1 0.7619048 DishWasher_A_Intensive60C + SolarCollector4mq >>>rTOT1 0.74509805 integer=1 source chosen: EolicGenerator1KW Best Rank : 0.53846157 RankTotal is : 0.35403848 DishWasher_A_Normal60C + coffee_request>>>>>rTOT=0.275 DishWasher_A_Normal60C + ENEL >>>rTOT1 0.55 DishWasher_A_Normal60C + EolicGenerator1KW >>>rTOT1 0.46153846 DishWasher_A_Normal60C + Photovoltaic_16mq >>>rTOT1 0.8148148 DishWasher_A_Normal60C + Photovoltaic_30mq >>>rTOT1 0.65 DishWasher_A_Normal60C + SolarCollector2mq >>>rTOT1 0.7619048 DishWasher_A_Normal60C + SolarCollector4mq >>>rTOT1 0.6862745 integer=29 at java.util.Vector.elementAt(Vector.java:470) at poliba.sisinflab.HomeReasonerWithEnergy.main(HomeReasonerWithEnergy.java:290) Java Result: 1
Re: Hello Hello
What is the size of the Vector at line 290?
Is 29 the value returned by the indexOf() method?
What object was the indexOf() method searching the Vector for?
Where is the first line of the stack trace that shows the type of error?
If you don't understand my answer, don't ignore it, ask a question.
Re: Hello Hello
this is the line: newItem=(Item) src.elementAt(totVector.indexOf(rTOT1min));
yes it returns that value.it shouldnt.Is 29 the value returned by the indexOf() method?
hmmm....it suppose to find the corresponding Item for the minValue(float)What object was the indexOf() method searching the Vector for?
Re: Hello Hello
Did you print out the value that indexOf was searching for?
What is the size of the Vector when the error occurred? Can you print it out?
Where is the first line of the stack trace from the error. Your posted output does not show it.
You need to print out all these values so you can see what the computer sees when it executes the code where the error occurs.
If you don't understand my answer, don't ignore it, ask a question.
Re: Hello Hello
that was very helpful. i realised that one of the vectors had always 6 elements ,while the other was incremented by 6 after every loop[duh!]
So i clear the problematic vector after every loop:
totVector.clear();
this seems to work.:-)
thnk you very much and forgive me for my ignorance.
Re: Hello Hello
The output from println can help you see what the computer sees. I find it very useful.
If you don't understand my answer, don't ignore it, ask a question.
speaker (March 30th, 2012)
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