LIst的逆向遍歷

public class list_demo {

public static void main(String[] args) {
	// TODO Auto-generated method stub
     List list=new ArrayList<>();
     list.add("a");
     list.add("b");

     ListIterator l=list.listIterator();//子類對象
     while(l.hasNext()) {
    	System.out.println((String)l.next());
     }
     while(l.hasPrevious()) {
     System.out.println((String)l.previous());
     }
}

}