List<Book> list = Lists.newArrayList();
list.add(new Book("1", "sql基礎大全", 200));
list.add(new Book("2", "Java基礎", 500));
System.out.println(list);
List<String> nameList = list.stream().map(Book -> Book.getName()).collect(Collectors.toList());
System.out.println(nameList);
輸出結果：
