Need help with ArrayList please...

[fatabass]

Hi,

When I run this code:

		ArrayList<Integer> possibleNumbers = new ArrayList<Integer>();
		
		for(int i = 0;i<4;i++)
		{
			possibleNumbers.add(i);
		}
		
		for(int element:possibleNumbers)
		{
			System.out.println(possibleNumbers.get(element));
		}

I get the output:
0
1
2
3

But I do not want my ArrayList to include 0. I want it to start from 1. So I modified my code:

		ArrayList<Integer> possibleNumbers = new ArrayList<Integer>();
		
		for(int i = 1;i<4;i++)
		{
			possibleNumbers.add(i);
		}
		
		for(int element:possibleNumbers)
		{
			System.out.println(possibleNumbers.get(element));
		}

and the output is:

2
3Exception in thread "main"
java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
at java.util.ArrayList.RangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at myPackage.avdas.main(avdas.java:15)

Can anyone help me with this?

[Norm]

Change your code to put very large numbers into the arraylist:

 possibleNumbers.add(i*100);

and see what happens?
The contents of the arraylist do not correspond to the indexes to the elements.
Also add this to the beginning of the second loop:

 System.out.println("el=" + element);// show the value of the index