代码的其它写法public class Main { public static void main(String[] args) { BookShelf bookShelf = new BookShelf(4); bookShelf.appendBook(new Book("Around the World in 80 Days")); bookShelf.appendBook(new Book("Bible")); bookShelf.appendBook(new Book("Cinderella")); bookShelf.appendBook(new Book("Daddy-Long-Legs")); Iterator it = bookShelf.iterator(); while (it.hasNext()) { Book book = (Book)it.next(); System.out.println(book.getName()); } } }
时间: 2023-05-18 18:04:02 浏览: 52
这是一个使用迭代器模式的书架类,可以用来存储和遍历书籍。在main方法中,首先创建了一个容量为4的书架对象bookShelf,然后向其中添加了四本书籍,最后使用迭代器遍历书架中的所有书籍并输出书名。这段代码的另一种写法可能会使用不同的数据结构来存储书籍,或者使用不同的方式来遍历书籍。
相关问题
代码的其它写法详细public class Main { public static void main(String[] args) { BookShelf bookShelf = new BookShelf(4); bookShelf.appendBook(new Book("Around the World in 80 Days")); bookShelf.appendBook(new Book("Bible")); bookShelf.appendBook(new Book("Cinderella")); bookShelf.appendBook(new Book("Daddy-Long-Legs")); Iterator it = bookShelf.iterator(); while (it.hasNext()) { Book book = (Book)it.next(); System.out.println(book.getName()); } } }
你可以尝试使用Lambda表达式来简化代码,如下所示:
public class Main {
public static void main(String[] args) {
BookShelf bookShelf = new BookShelf(4);
bookShelf.appendBook(new Book("Around the World in 80 Days"));
bookShelf.appendBook(new Book("Bible"));
bookShelf.appendBook(new Book("Cinderella"));
bookShelf.appendBook(new Book("Daddy-Long-Legs"));
bookShelf.forEach(book -> System.out.println(book.getName()));
}
}
优化代码的详细public class Main { public static void main(String[] args) { BookShelf bookShelf = new BookShelf(4); bookShelf.appendBook(new Book("Around the World in 80 Days")); bookShelf.appendBook(new Book("Bible")); bookShelf.appendBook(new Book("Cinderella")); bookShelf.appendBook(new Book("Daddy-Long-Legs")); Iterator it = bookShelf.iterator(); while (it.hasNext()) { Book book = (Book)it.next(); System.out.println(book.getName()); } } }
为了优化这段代码,我们可以考虑使用Lambda表达式来简化迭代器的使用,如下所示:
public class Main {
public static void main(String[] args) {
BookShelf bookShelf = new BookShelf(4);
bookShelf.appendBook(new Book("Around the World in 80 Days"));
bookShelf.appendBook(new Book("Bible"));
bookShelf.appendBook(new Book("Cinderella"));
bookShelf.appendBook(new Book("Daddy-Long-Legs"));
bookShelf.forEach(book -> System.out.println(book.getName()));
}
}
这样,我们就可以直接使用forEach方法来遍历书架上的所有书籍,而不需要使用迭代器了。