List books=new ArrayList();
        books.add("轻量级java");
        books.add("疯狂java");
        books.add("疯狂android");
        for(int i=0;i<books.size();i++){
            System.out.println(books.get(i));
        }
        Iterator it=books.iterator();
        while(it.hasNext()){
            String book=(String) it.next();
            System.out.println(book);
            if(book.equals("疯狂java")){
                //it.remove();
                //books.remove(book);
            }
        }
        for(Object obj:books){
            String book=(String) obj;
            System.out.println(book);
        }

待续