Thread: Program not working

import java.util.*;
public class Arraylistcollection
{
ArrayList<Integer> list = new ArrayList<Integer>();
Public static void main (String args[])
{
//Numberinglist(list);
int total = 0;
Iterator<Integer> iter = list.iterator();
while (iter.hasNext())
{
Integer val = iter.next();
total = total + val;
}
System.out.println("The total Amount is" +total);
}
private static void Numberinglist(ArrayList<Integer> list)
{
list.add(new Integer(1));
list.add(new Integer(2));
}


}

--- Update ---

Sorry
Numberinglist(list); is not commented.
it is still throwuing an error on the opening braces to Public static void main(String args[]);

--- Update ---

Error is:

Compilation Errors Detected

Line: 6
<identifier> expected

Hi..
Thankyou for the reply,, but where exactly am i using the wrong case, im not able to figure out.

Thanks for helping.

H,,
i got it.. public should be all low case.

ta,
KSR

Hi Junky,
Im really viewing this from C++ perspective, since i am not @ alll fluent with java..

On solving my previous error, i got an error saying:
" Line: 8
non-static variable list cannot be referenced from a static context

Line: 10
non-static variable list cannot be referenced from a static context "

So i removed main function - just to test - i know this would be not good since there wud be no starting point for compiler, but just to test.

On removal of main, it says:
Line: 8
invalid method declaration; return type required

---> What im not getting is that, on line 8:" Numberinglist(list);" - here im only trying to call the function with a parameter.. then why exactly is this error popping up..

Hi Junky,

yes you are right... And thankyou so much to elaborate on the concept.. So i cannot use an instance in a static void main.. So i removed my void main (since my compiler would not take a non-static main, which is how it should be - otherwise main would get instantiated, martyring basic principles). But when i remove main, it throws other error on line 8:
Line: 8
invalid method declaration; return type required
--> What im not understanding is - this is not procedural - then y is my compiler, on removal of main, is not understaing on line 8 that im only calling the function - and not declaring/defining it.

--- Update ---

Line 8:
Numberinglist(list);

--- Update ---

Compilation Errors Detected

Line: 8
invalid method declaration; return type required

Line: 8
<identifier> expected

So are we creating an instance for a class domestically? - Becaus main is defined in the same class..

Based on what you taught, this is best and simplest i could come up with:
import java.util.*;

public class ArrayL
{
public void Numberinglist(ArrayListCollection<Integer> list)
{
list.add(1);
list.add(2);
}

public static void main(String[] args)
{
ArrayListCollection<Integer> list = new ArrayListCollection<Integer>();
ArrayL l = new ArrayL();
l.Numberinglist(list);
}
}

Still error:
cannot find symbol
symbol: class ArrayListCollection
location: class ArrayL

Something is really wrong.
Apparently i dont work in java, so i dont have a system available @ office.. im practicing online on this:
Java Online Compiler & Runner

-> Do u think something wrong with this cloud app?


Regards and thanks,
KSR

--- Update ---

anybody??

--- Update ---



--- Update ---

Correct code:

import java.util.*;

public class ArrayL
{
public void Numberinglist(ArrayList<Integer> list)
{
list.add(1);
list.add(2);
}

public static void main(String[] args)
{
ArrayList<Integer> list = new ArrayList<Integer>();
ArrayL l = new ArrayL();
l.Numberinglist(list);
int total = 0;
Iterator<Integer> iter = list.iterator();
while (iter.hasNext())
{
Integer val = iter.next();
total = total + val;
}
System.out.println("The total amount is " +total);
}
}

Thankyou so much for all help!

Regards,
KS