public class dsd {
public static final User[] users = new User[100];
public static int usersLength = 0;
public static final Book[] books = new Book[100];
public static int booksLength = 0;
static{
users[0] = new User(User.ADMIN,"zs","123");
users[1] = new User(User.STUDENT,"ls","456");
users[2] = new User(User.STUDENT,"ww","123456");
users[3] = new User(User.STUDENT,"ds","521346");
books[0] = new Book("西游记","吴承恩",21,5);
books[1] = new Book("水浒传","施耐庵",25,3);
books[2] = new Book("红楼梦","曹雪芹",30,3);
books[3] = new Book("三国演义","罗贯中",40,10);
}
public static void main(String[] args) {
for (int i = 0; i <books.length; i++) {
System.out.println(books[i]);
}
}}
这些打完以后他就给我输出以下内容:
Book@182decdb
Book@7637f22
Book@4926097b
Book@762efe5d
后面的索引都是null了,因为后面我没有加内容
我想把数组里面的字段给输出出来