23 lines
402 B
Java
23 lines
402 B
Java
package chapter3.demo31;
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public class OrderItem {
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private final Book book;
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private final int num;
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// 有参构造方法
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public OrderItem(Book book, int num) {
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this.book = book;
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this.num = num;
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}
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// 获取图书对象
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public Book getBook() {
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return book;
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}
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// 获取订购图书数量
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public int getNum() {
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return num;
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}
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}
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