Array Lists help!!

[lilika]

Hello everybody!

I am new to java and i have a problem. I need to create an arraylist from the coordinates οφ the real and estimated values that I have read from a file.But i can't seem to do that! Can you help me please??

I woul really appreciate your help cause i m lost!!!

[KevinWorkman]

What happens differently from what you were expecting? Do you get an Exception? Strange results?

Step through your program with a debugger to see where the program behavior differs from what you'd expect.

[lilika]

I cant make the array list. My result from reading the file are ok..But i can't create an array list with the integers from my file. There are no strange results...but i can't go any further for the time...
Could someone tell me how (and where) to put the code for the array list?

Thank you for your answer!

[JeanNoel 53]

I have not seen any point on which the arrayLisdt is filled. e.g; using myArrayList.add(myData)

[lilika]

I have not seen any point on which the arrayLisdt is filled. e.g; using myArrayList.add(myData)

Thats exactly what i can't do. i ve googled it and tried everything but i don't know where to put the add function and in what way will it read my coordinates (Real X, Real Y, Received X, Received Y)

[JeanNoel 53]

il put the add in the while loop after each time you get the X Y,.. and the you add it in the list
No problemen with the ArrayList for a int as you write Integer

[lilika]

il put the add in the while loop after each time you get the X Y,.. and the you add it in the list
No problemen with the ArrayList for a int as you write Integer

Ok i can understand that. But what will be my data in the command myArrayList.add(myData)?

RealX?Real Y?Received X, Received Y? Or something else??

Thank you!

[doWhile]

Cross posted at the Java Programming Forums

[lilika]

Is that a problem? I didn't know that.

[doWhile]

The same conversation and information provided might be going on in both locations. Providing a link between cross-posts makes contributors aware of this, and not spend their time rehashing an issue that has been addressed/answered/etc... elsewhere. See Be Forthright when Cross Posting

[lilika]

The same conversation and information provided might be going on in both locations. Providing a link between cross-posts makes contributors aware of this, and not spend their time rehashing an issue that has been addressed/answered/etc... elsewhere. See Be Forthright when Cross Posting

Ok Thank you!!

[JeanNoel 53]

either you have a class to gather your 4 integer and you will push (add) the class in the list. In this case you have to change the prototype of the ArrayList
or you can add 4 time the integers in a dedicated order to get it in the same order.

[lilika]

Thank you so much. I managed to do that. Now that I made the array list, i have to loop throught it in order to calculate some averages. But i don't want the average of all the array list but from some specific numbers( which are in specific places)

ex. A B C D E F G H I J K L ....

I need the average of C+G+K+....+/ how many are they.