day06-面向对象的案例
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package com.inmind.test04;
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/*
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定义一个图书Book类。
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- 属性:图书编号,书名,价格,出版日期
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- 构造方法:
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- 无参构造方法,满参构造方法
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- 成员方法:
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- get/set方法
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- showBook方法,输出图书信息
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*/
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public class Book {
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//属性:图书编号,书名,价格,出版日期
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private String bookId;
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private String name;
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private double price;
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private String publishDate;
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//无参构造方法:创建书对象,对属性赋了默认值
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public Book() {
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}
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//满参构造方法:创建书对象,并给所有属性赋值
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public Book(String bookId, String name, double price, String publishDate) {
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this.bookId = bookId;
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this.name = name;
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this.price = price;
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this.publishDate = publishDate;
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}
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//get/set方法
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public String getBookId() {
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return this.bookId;
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}
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public void setBookId(String bookId) {
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this.bookId = bookId;
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}
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public String getName() {
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return this.name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public double getPrice() {
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return this.price;
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}
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public void setPrice(double price) {
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this.price = price;
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}
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public String getPublishDate() {
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return this.publishDate;
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}
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public void setPublishDate(String publishDate) {
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this.publishDate = publishDate;
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}
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//自定义成员方法
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public void showBook(){
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System.out.println("编号:"+this.bookId+",书名:"+this.name+",价格:"+this.price+",出版日期:"+this.publishDate);
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}
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}
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@@ -1,4 +1,6 @@
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package com.inmind.test04;
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/*
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* 最贵的书。
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* 定义一个图书Book类。
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@@ -13,4 +15,29 @@ package com.inmind.test04;
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* 定义测试类,使用满参构造方法,创建三(多)个Book对象,判断价格最贵的图书(存放书的数组的遍历),并输出图书信息。
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*/
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public class Test05 {
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public static void main(String[] args) {
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//使用满参构造方法,创建三(多)个Book对象
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Book b1 = new Book("B001", "java从入门到崩溃", 99.9, "2020-01-01");
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Book b2 = new Book("C003", "数据库从删库到跑路", 59.9, "2022-01-01");
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Book b3 = new Book("D005", "python-AI大模型开发", 299.9, "2025-01-01");
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//判断价格最贵的图书(存放书的数组的遍历)
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//定义一个存放图书的数组
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// Book[] bookArr = new Book[]{b1,b2,b3};
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Book[] bookArr = {b1,b2,b3};
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//遍历数组,求最贵的图书
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Book maxBook = bookArr[0];
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for (int i = 1; i < bookArr.length; i++) {
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//获取当前遍历的图书
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Book book = bookArr[i];
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/*double currentPrice = book.getPrice();
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double maxBookPrice = maxBook.getPrice();
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if (currentPrice > maxBookPrice){*/
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if (book.getPrice() > maxBook.getPrice()){
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//将当前的书,修改为,最贵的书
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maxBook = book;
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}
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}
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//遍历结束,最贵的书就是maxBook
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maxBook.showBook();
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}
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}
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