Id: collect.tex,v 1.2 2003/12/18 23:39:38 joe Exp
interface Collection { boolean add (Object o); Iterator iterator (); } |
interface Iterator { boolean hasNext (); Object next (); } |
interface Set extends Collection { } |
class TreeSet implementes Set |
String [] a = { "eins", "zwei", "drei", "vier" }; TreeSet t; for (int k = 0; k < a.length; k++ ) { t.add (a [k]); } Iteraror it = t.iterator (); while (it.hasNext()) { System.out.print (it.next() + " "); }