CollectionsPredicateFilterSample.java

import static java.lang.System.out;
import static java.util.Arrays.asList;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.Predicate;

public class ListTests {
   public static void main( String[] args ) {
      List<String> names = asList( "Ted", "Fred", "Jed", "Ned" );
      out.println( names );
      List<String> shortNames = new ArrayList<String>();
      shortNames.addAll( names );
      CollectionUtils.filter( shortNames, new Predicate(){
         public boolean evaluate( Object input ) {
            return ((String) input).length() < 4;
         }
      } );
      out.println( shortNames.size() );
      for( String s : shortNames )
         out.println( s );
   }
}