Java Collection Tutorial - Java Collections.addAll(Collection <? super T> c, T... elements)

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Syntax

Collections.addAll(Collection <? super T> c, T... elements) has the following syntax.

@SafeVarargs public static <T> boolean addAll(Collection <? super T> c,    T... elements)

Example

In the following code shows how to use Collections.addAll(Collection <? super T> c, T... elements) method.

//from w ww . j  a va2s .c om
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Main {
   public static void main(String args[]) {
      List<String> arrlist = new ArrayList<String>();
      
      arrlist.add("A");
      arrlist.add("B");
      arrlist.add("C");  
      arrlist.add("from java2s.com");
      
      System.out.println(arrlist);
      
      // add values to this collection
      boolean b = Collections.addAll(arrlist, "1","2","3");
      
      System.out.println(arrlist);
   }    
}

The code above generates the following result.

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