import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.Map.Entry;

public class Book {
    /**
     * 第二题
     */
    private String name;// 书名
    private int page;// 页数

    public Book(String name, int page) {// 有参构造
        super();
        this.name = name;
        this.page = page;
    }

    public String getName() {// setter getter方法
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getPage() {
        return page;
    }

    public void setPage(int page) {
        this.page = page;
    }

    public static Map<String, Book> map = new HashMap<String, Book>();

    public void initMap() {
        map.put("SA001", new Book("SOFT_A", 1));// 初始化
        map.put("SA002", new Book("SOFT_B", 3));
        map.put("SA003", new Book("SOFT_C", 5));
        map.put("SA004", new Book("SOFT_D", 7));
        map.put("SA005", new Book("SOFT_E", 9));
        map.put("SA006", new Book("SOFT_F", 11));
        map.put("SA007", new Book("SOFT_G", 13));
        map.put("SA008", new Book("SOFT_H", 15));
        map.put("SA009", new Book("SOFT_I", 17));
        map.put("SA010", new Book("SOFT_J", 19));
    }

    public static void printAllBookInf() {
        System.out.println("编号\t书名\t页数");
        Set<Entry<String, Book>> set = map.entrySet();
        for (Iterator iterator = set.iterator(); iterator.hasNext();) {// 迭代输出对象
            Entry<String, Book> entry = (Entry<String, Book>) iterator.next();
            System.out.println(entry.getKey() + "\t"
                    + entry.getValue().getName() + "\t"
                    + entry.getValue().getPage());
        }// 打印出所有图书信息
    }

    public static void printOneBookInf() {
        Random ran = new Random();
        int i = ran.nextInt(10) + 1;// 随机产生书号
        String str = String.valueOf(i);
        String id = "SA0" + str;
        System.out.println("该编号对应的书名：" + map.get(id).getName() + " 页数为："
                + map.get(id).getPage());
    }// 打印随机产生书号的信息

    public static void main(String[] args) {
        Book.printAllBookInf();// 调用打出所有图书的方法
        Book.printOneBookInf();// 调用打出随机产生图书的方法
    }
}

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Random;
import java.util.Set;

public class Book {
    /**
     * 第二题
     */
    private String name;// 书名
    private int page;// 页数

    public Book(String name, int page) {// 有参构造
        super();
        this.name = name;
        this.page = page;
    }

    public String getName() {// setter getter方法
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getPage() {
        return page;
    }

    public void setPage(int page) {