Loop a list by generic Iterator

 
import java.text.DateFormatSymbols;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;

public class OysterMonths {
  Collection<String> safeMonths;

  public Collection<String> filter(Collection<String> c) {

    Collection<String> filteredCollection = new ArrayList<String>();

    for (Iterator<String> i = c.iterator(); i.hasNext();) {
      String s = i.next();
      if (condition(s)) {
        filteredCollection.add(s);
      }
    }
    return filteredCollection;
  }

  public boolean condition(String s) {
    return s.contains("r");
  }

  public static void main(String[] args) {
    OysterMonths om = new OysterMonths();
    DateFormatSymbols dfs = new DateFormatSymbols();
    String[] monthArray = dfs.getMonths();
    Collection<String> months = Arrays.asList(monthArray);
    om.safeMonths = om.filter(months);
    System.out.println("The following months are safe for oysters:");
    System.out.println(om.safeMonths);
  }
}