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import java.util.ArrayList;
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import java.util.List;
/**
* 测试类
*
* @author 时间在流
*
*/
public class Test {
/**
* 这个属性用来模仿书房
*/
private ListListString room = new ArrayListListString();
/**
* 向书房里添加一个书架
*
* @return 新添加书架的索尘蠢搜引
*/
public int addBookShelf() {
room.add(new ArrayListString());
return room.size() - 1;
}
/**
* 向书架里添加一本书
*
* @param bookShelfIndex 书架索引
* @param book 书。这里就用一个字符串代表一本书了，你要愿意也可以单独创建一个派历书类
* @return 新添加书籍的索引
*/
public int addBook(int bookShelfIndex, String book) {
ListString shelf = room.get(bookShelfIndex);
shelf.add(book);
return shelf.size() - 1;
}
// 更新书架我就不写了。
/**
* 更新书架上的某本书
*
* @param bookShelfIndex 书架索引
* @param bookIndex 旧书索引
* @param newBook 新书
*/
public void setBook(int bookShelfIndex, int bookIndex, String newBook) {
ListString shelf = room.get(bookShelfIndex);
shelf.set(bookIndex, newBook);
}
/**
* 移除一个书架
*
* @param bookShelfIndex 书架索引
* @return 剩余档御书架的个数
*/
public int removeBookShelf(int bookShelfIndex) {
room.remove(bookShelfIndex);
return room.size();
}
/**
* 移除书架上的某本书
*
* @param bookShelfIndex 书架索引
* @param bookIndex 书籍索引
* @return 该书架剩余书的数量
*/
public int removeBook(int bookShelfIndex, int bookIndex) {
ListString shelf = room.get(bookShelfIndex);
shelf.remove(bookIndex);
return shelf.size();
}
/**
* 获得一个书架
*
* @param bookShelfIndex 书架索引
* @return 书架
*/
public ListString getBookShelf(int bookShelfIndex) {
return room.get(bookShelfIndex);
}
/**
* 获得书架上的某本书。在现实生活中拿走了一本书，书架上应该会少一本
*
* @param bookShelfIndex 书架索引
* @param bookIndex 书籍索引
* @return 书籍
*/
public String getBook(int bookShelfIndex, int bookIndex) {
ListString shelf = room.get(bookShelfIndex);
return shelf.get(bookIndex);
}
public static void main(String[] args) {
Test test = new Test();
int shelf1Index = test.addBookShelf();
int shelf2Index = test.addBookShelf();
int book1Index = test.addBook(shelf1Index, "鬼吹灯");
int book2Index = test.addBook(shelf1Index, "盗墓笔记");
int book3Index = test.addBook(shelf2Index, "斗破苍穹");
int book4Index = test.addBook(shelf2Index, "斗罗大陆");
test.setBook(shelf2Index, book4Index, "吞噬星空");
System.out.println("2号书架的第2本书是" + test.getBook(shelf2Index, book4Index));
System.out.println("移除了2号书架的第2本书，2号书架还剩" + test.removeBook(shelf2Index, book4Index) + "本书");
System.out.println("移除了第2个书架，现在还剩" + test.removeBookShelf(shelf2Index) + "个书架");
ListString shelf = test.getBookShelf(shelf1Index);
System.out.println("1号书架书籍列表：");
for (String book : shelf) {
System.out.println(book);
}
}
}
package com.hua.excep;
public class Libary {
private int id;
private String name;
private String shop;
private int num;
//两个构造方法
/答判并/无清迹参
public Libary() {
}
//四个参数
public Libary(int id, String name, String shop, int num) {
this.id = id;
this.name = name;
this.shop = shop;
this.num = num;
}
//输入图书信息
public void inputBook(int id,String name,String shop){
this.id=id;
this.name=name;
this.shop=shop;
}
//冲兄输出三个图书信息
public int getId() {
return id;
}
public String getName() {
return name;
}
public String getShop() {
return shop;
}
//修改库存
public void setNum(int num) {
this.num = num;
}
}
---------------------------------------------------
给你修改了三个地方：
1.borrowBooks方法中，将System.out.println("你要借吗？"); 改为：
System.out.println("你要借吗闷前？输入1表示借，其他数字表示不借。");
保证输入的时候输入的数字，否则会报裂隐出异常。
2.borrowBooks方法中，将self[score] = all[9]; 改为：self[score] = all[i];
如果是all[9]，那么就始终是最后一本书籍信息了。
3.have方法中，你是想将所借的书籍信息都打印出来。修改的比较多，下面注释代码是原来的。
void have(Books[] self) {
// for (int i = 0; i 2; i++) {
// self[i].showBookInfo();
// }
for (int i = 0; i 3; i++) {
if(self[i]!=null)
self[i].showBookInfo();
}
}
****************** 附上所有代码：*************************
import java.util.Scanner;
public class TestBook {
public static void main(String[] args) {
Books all[] = new Books[10];
Books self[] = new Books[3];
all[0] = new Books("java", 1, "12345", "tom", 34.0f, "人民出版社");
all[1] = new Books("c", 2, "12346", "tnn", 31.0f, "人民出版社");
all[2] = new Books("c++", 3, "12445", "mm", 35.0f, "人民出版社");
all[3] = new Books("c#", 4, "12365", "tt", 38.0f, "人民出版社");
all[4] = new Books("j2se", 5, "13345", "tosm", 31.1f, "人民出版社");
all[5] = new Books("j2ee", 6, "18345", "ttm", 32.0f, "人民出版社");
all[6] = new Books("jsp", 7, "12335", "cc", 33.0f, "人民出版社");
all[7] = new Books("net", 8, "12341", "bb", 36.0f, "人民出版社");
all[8] = new Books("ip", 9, "12343", "aa", 37.0f, "人民出版社");
all[9] = new Books("tcp", 10, "22345", "jj", 39.0f, "人民出版社");
Readers r = new Readers("xiaoming", 101, "1", 3);
r.searchAllBooks(all);
r.borrowBooks(all, self);
r.have(self);
r.give(all, self);
}
}
class Readers {
Scanner scan = new Scanner(System.in);
String names;
int nums;
String classes;
int grade;
int score = 0;
// Books self[]=new Books[3];
Readers(String n, int u, String c, int g) {
names = n;
nums = u;
classes = c;
grade = g;
}
void searchAllBooks(Books[] all) {/肆罩厅/ 查书
for (int i = 0; i 10; i++)
all[i].showBookInfo();
// self[score]=all[0];
}
void give(Books[] all, Books[] self) {// 还书
System.out.println("请输入您要还的书的书号");
int n = scan.nextInt();
for (int i = 0; i 10; i++) {
if (n == all[i].num) {
for (int j = 0; j 3; j++) {
if (self[j] == all[i]) {
self[j] = null;
System.out.println("还书成功");
}
}
}
}
}
void have(Books[] self) {
// for (int i = 0; i 2; i++) {
// self[i].showBookInfo();
// }
for (int i = 0; i 3; i++) {
if(self[i]!=null)
self[i].showBookInfo();
}
}
void giveMoney() {
}
void borrowBooks(Books[] all, Books[] self) {
System.out.println("请输入您要查找的书名：");
String n = scan.next();
int i;
for (i = 0; i 10; i++) {
if (n.equals(all[i].name)) {
all[i].showBookInfo();
break;
}
}
//System.out.println("你要借吗？");
System.out.println("你要借吗？输入1表示借，其他数字表示不借。");
int j;
j = scan.nextInt();
if (j == 1) {
System.out.println("借阅成功");
//self[score] = all[9];
self[score] = all[i];
score += 1;
}
if (score 4) {
System.out.println("您还可以借阅" + (3 - score) + "本");
} else {
System.out.println("对不起，一个人只能借3本");
}
}
}
class Books {
String name;
int num;
String ISBN;
String writer;
float price;
String publisher;
Books(String n, int u, String i, String w, float p, String l) {
name = n;
num = u;
ISBN = i;
writer = w;
price = p;
publisher = l;
}
void showBookInfo() {
System.out.println("**************************");
System.out.println("书名：" + name);
System.out.println("索书号：" + num);
System.out.println("ISBN号：" + ISBN);
System.out.println("价格：" + price);
System.out.println("出版社：" + publisher);
System.out.println("**************************");
}
}
----------------------------------------------------
使用java语言设计一款小型图书管理系统颂中，能够通过主卜漏界面根据关键字查询图书信息，能够型樱烂添加图书信息和删除过去图书信息