Automaters: Full Stack QA_SDET: How to Add/Join/Combine two arraylist? Core java Interview question? Top 5 programming qus on Arraylist?

Monday 25 November 2019

How to Add/Join/Combine two arraylist? Core java Interview question? Top 5 programming qus on Arraylist?

Let there are two array list and we need to add value of both arraylist into one:

// use import java.util.ArrayList;

public class AddTwoArrayList
{
    public static void main(String [] args)
    {
        //First ArrayList
        ArrayList<String> arraylist01=new ArrayList<String>();
        arraylist01.add("Kist1");
        arraylist01.add("Kist2");
        arraylist01.add("Kist3");

        //Second ArrayList
        ArrayList<String> arraylist02=new ArrayList<String>();
        arraylist02.add("Nist1");
        arraylist02.add("Nist2");
        arraylist02.add("Nist3");

        //Combined ArrayList
        ArrayList<String> arraylistCombined= new ArrayList<String>();
        arraylistCombined.addAll(arraylist01);
        arraylistCombined.addAll(arraylist02);

        //Displaying elements of the joined ArrayList
        for(String temp: arraylistCombined){
            System.out.println(temp);
        }
    }
}