Last Updated : 02 Jan, 2019
This method appends all of the elements in the specified collection to the end of this list, in the order that they are returned by the specified collection's iterator.
Syntax:boolean addAll(Collection c)Parameters:
This function has a single parameter, i.e, Collection c, whose elements are to be appended to the list.
Returns:It returns true if the elements of specified list is appended and list changes. Below programs show the implementation of this method.
Program 1: Java
// Java code to show the implementation of
// addAll method in list interface
import java.util.*;
public class GfG {
// Driver code
public static void main(String[] args)
{
// Initializing a list of type arraylist
List<Integer> l = new ArrayList<>();
l.add(10);
l.add(15);
l.add(20);
System.out.println(l);
// Initializing a collection to be appended to list
ArrayList<Integer> arr = new ArrayList<Integer>();
arr.add(100);
arr.add(200);
arr.add(300);
System.out.println(arr);
l.addAll(arr);
System.out.println(l);
}
}
Output:
[10, 15, 20] [100, 200, 300] [10, 15, 20, 100, 200, 300]Program 2:
Below is the code to show implementation of list.addAll() using Linkedlist.
Java
// Java code to show the implementation of
// addAll method in list interface
import java.util.*;
public class GfG {
// Driver code
public static void main(String[] args)
{
// Initializing a list of type Linkedlist
List<Integer> l = new LinkedList<>();
l.add(10);
l.add(15);
l.add(20);
System.out.println(l);
// Initializing a collection to be appended to list
ArrayList<Integer> arr = new ArrayList<Integer>();
arr.add(100);
arr.add(200);
arr.add(300);
System.out.println(arr);
l.addAll(arr);
System.out.println(l);
}
}
Output:
[10, 15, 20] [100, 200, 300] [10, 15, 20, 100, 200, 300]Reference: Oracle Docs
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4