Adding one arraylist to another

Question

Here are my two Arraylists and how do I add one to the other

private ArrayList<String> myStringList= new ArrayList<String>();
private ArrayList<String> newStringList= new ArrayList<String>();

I would like to add all the strings which are in myStringList to newStringList.

Can anyone help me with this ?

• JanTheGun: Possible duplicate of Concatenate multiple arraylists references
• SomeJavaGuy: did you just ask this duplicate question to answer it for yourself?
• coder: @Kevin. Not really :) but found lately the mistake I have done and finally answered my own question here so that someone might go through it.
• SomeJavaGuy: @coder ok, it just looks confusing since the question and the answer are just 1 minute apart from each other

Answer 1

You can use the constructor which takes a collection like

private List<String> newStringList= new ArrayList<>(myStringList);

Or call List.addAll(Collection) like

newStringList.addAll(myStringList);

Answer 2

Got the answer:

Here is the way:

 myStringList.addAll(newStringList);

• coder: @Lathy- Please check the answered duration of mine and his. He has mentioned after I have done that :)

Answer 3

try this.Hope it helps

1. myStringList.addAll(newStringList);
2. you can loop and add to other.