Collection interface demonstrated via an ArrayList object. - Java Collection Framework

Java examples for Collection Framework:List

  1. HOME
  2. Java
  3. Collection Framework
  4. List

Description

Collection interface demonstrated via an ArrayList object.

Demo Code

import java.util.List;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

public class Main 
{
   public static void main(String[] args)
   {/*  ww  w .  ja  va 2s.  c  o  m*/
      // add elements in colors array to list
      String[] colors = {"BLACK", "RED", "WHITE", "BLUE", "CYAN"};
      List<String> list = new ArrayList<String>();      

      for (String color : colors)
         list.add(color); // adds color to end of list      

      // add elements in removeColors array to removeList
      String[] removeColors = {"RED", "WHITE", "BLUE"};
      List<String> removeList = new ArrayList<String>();

      for (String color : removeColors)
         removeList.add(color); 

      // output list contents
      System.out.println("ArrayList: ");

      for (int count = 0; count < list.size(); count++)
         System.out.printf("%s ", list.get(count));

      // remove from list the colors contained in removeList
      removeColors(list, removeList);

      // output list contents
      System.out.printf("%n%nArrayList after calling removeColors:%n");

      for (String color : list)
         System.out.printf("%s ", color);
   } 

   // remove colors specified in collection2 from collection1
   private static void removeColors(Collection<String> collection1, 
      Collection<String> collection2)
   {
      // get iterator
      Iterator<String> iterator = collection1.iterator(); 

      // loop while collection has items
      while (iterator.hasNext())         
      {
         if (collection2.contains(iterator.next()))
            iterator.remove(); // remove current element
      } 
   } 
}

Related Tutorials