Java Vector.removeAll(Collection <?> c)

public boolean removeAll(Collection <?> c)

//from   w  w  w .ja  v  a2s.  c o  m
import java.util.Vector;

public class Main {
   public static void main(String[] args) {
           
      Vector  vec = new Vector  (4);

      
      vec.add(4);
      vec.add(3);
      vec.add(2);
      vec.add(1);

      System.out.println(vec);
      System.out.println("Size of the vector: "+vec.size());
      
      // let us remove all the elements
      System.out.println("Removing all the elements"); 
      vec.removeAll(vec);
      System.out.println("Size of the vector: "+vec.size());       
   }     
}