JAVA5的新特性收集

??? listOld.add("Java");?
??? String strOld = "";?
??? for(Iterator iter = listOld.iterator();iter.hasNext();){?
??? String strTemp = (String)iter.next();?
??? strOld += strTemp;?
??? }?
??? System.out.println(strOld);?
}?

----------------new-----------------?
void testListNew(){?
???? List<String> listNew = new ArrayList<String>();?
???? listNew.add("Agile");?
???? listNew.add(" ");?
???? listNew.add("Java");?
??? String str = "";?
??? for(String strTemp:listNew){?
???? str += strTemp;?
??? }?
??? System.out.println(str);?
}?

?