Introduction

In this demo I have used NetBeans IDE 8.2 for debugging purpose. But you can use any java programming language compiler as per your availability..

import java.util.ArrayList;
import java.util.Collections;
  public class Javacollectionexcercise {
  public static void main(String[] args) {
   ArrayList<String> Stringslist1= new ArrayList<String>();
          Stringslist1.add("Audi");
          Stringslist1.add("BMW");    
          Stringslist1.add("Bugatti");
          Stringslist1.add("Ford");
          Stringslist1.add("Honda");
 
          System.out.println("First array list: " + Stringslist1);
          ArrayList<String> Stringslist2= new ArrayList<String>();
          Stringslist2.add("Ferrari");
          Stringslist2.add("Fiat");
          Stringslist2.add("Honda");
          Stringslist2.add("Hyundai");
          System.out.println("Second array list: " + Stringslist2);
 
      // Let join above two list
        ArrayList<String> a = new ArrayList<String>();
        a.addAll(Stringslist1);
        a.addAll(Stringslist2);
        System.out.println("New array list: " + a);
 
 
     }
}

Result