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ArrayListAddAllListExample.java
import java.util.ArrayList; /* * Example of addAll(Collection<? extends E> c) method */ public class ArrayListAddAllListExample { public static void main(String[] args) { ArrayList<String> arrayList1 = new ArrayList<String>(); arrayList1.add("Ram"); arrayList1.add("Dave"); arrayList1.add("Peter"); System.out.println("arrayList 1 : " + arrayList1); ArrayList<String> ArrayList2 = new ArrayList<String>(); ArrayList2.add("Julia"); ArrayList2.add("Akram"); System.out.println("ArrayList 2 : " + ArrayList2); /* * Adding ArrayList2 collection elements to the arrayList1 collection */ arrayList1.addAll(ArrayList2); System.out .println("After adding ArrayList2 collection elements to the arrayList1 collection "); System.out.println("arrayList 1 : " + arrayList1); } }
arrayList 1 : [Ram, Dave, Peter] ArrayList 2 : [Julia, Akram] After adding ArrayList2 collection elements to the arrayList1 collection arrayList 1 : [Ram, Dave, Peter, Julia, Akram]
ArrayListAddAllSetExample.java
import java.util.ArrayList; import java.util.HashSet; import java.util.List; import java.util.Set; /* * Example of addAll(Collection<? extends E> c) method */ public class ArrayListAddAllSetExample { public static void main(String[] args) { List<String> list = new ArrayList<String>(); list.add("Ram"); list.add("Dave"); list.add("Peter"); System.out.println("List : " + list); Set<String> set = new HashSet<String>(); set.add("Julia"); set.add("Akram"); System.out.println("Set : " + set); /* * Adding Set collection elements to the list collection */ list.addAll(set); System.out.println("List : " + list); } }
List : [Ram, Dave, Peter]
Set : [Julia, Akram]
List : [Ram, Dave, Peter, Julia, Akram]
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