Adding a single row at the end of `ArrayList`

Question

folks, how can I add an additional row to the end of the 2D ArrayList? What is the technique for that? Or how should I approach it? I haven't written a code for that because I don't how to start it.

I have a 2D ArrayList which is

ArrayList<ArrayList<T>> myBoard = new ArrayList<ArrayList<T>>(); and would like to add an additional line to its end but do not know how to approach it. My 2D ArrayList looks like the following:

The number of rows is 6
The number of cols is 3
ABC
AAA
BAC
BEC
BEA
BAB

Could please smb help me?

public void addRowBottom(ArrayList<ArrayList<T>> myBoard){
      ArrayList<T> addRow = new ArrayList<T>();

}

Suresh Atta · Accepted Answer · 2015-09-06 03:01:53Z

3

List is ordered Collection. When you add to the list it already adds at end. That will the highest indexed element in the list.

public void addRowBottom(ArrayList<ArrayList<T>> myBoard){
      ArrayList<T> addRow = new ArrayList<T>();
      //add data to addRow
      myBoard.add(addRow);
}

answered Sep 6, 2015 at 3:01

Suresh Atta

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4 Comments

Suresh Atta Over a year ago

@Michael Yes. Try and see ;)

Michael Over a year ago

@SureshAtta, thanks for the response! One more question: to add a column in the end, should I run a loop through the myBoard and add an empty space in the end of each line? I'd appreciate it!

Suresh Atta Over a year ago

@Michael You should ask that as a new question. Anyways, what do you mean by empty space in the end of each line ?

Michael Over a year ago

@SureshAtta, I will ask it as a new question soon if I do not figure out it on my own. Thank you!

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