How to add elements from one array to another?

Question

I have a class called people that has its own name, id etc... I have a full list of people in an array list public ArrayList<people> pList; When I click on some names I want to add the people in pList to public ArrayList<people> followList; Doing followList.add(pList.get(position)) doesn't work. What is the proper way to do this.

Also, on another click I would like to remove the particular object from the followList so I tried doing followList.remove(pList.get(position)) but obviously it doesn't work as well.

Im basically trying to have a list of people from the original list.

Have you initialized followList with something like new ArrayList<people>()? — Michael
– Michael, Commented Aug 26, 2011 at 20:42

Michael · Accepted Answer · 2011-08-26 21:06:43Z

1

The followList seems to be not initialized. You should call initialize it with new ArrayList<people>() before adding to or removing from it.

answered Aug 26, 2011 at 21:06

Michael

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Braden · Accepted Answer · 2011-08-26 20:44:35Z

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Are you sure that you have instantiated the ArrayList followList, and that there is in fact a element at pList[position]?

answered Aug 26, 2011 at 20:44

Braden

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1 Comment

Michael Over a year ago

If there was no element at the specified position then IndexOutOfBoundsException would be thrown.

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