java书名作者出版社_Java 面向对象封装的代码练习
public class BookTest {
// 测试方法
public static void main(String[] args) {
//实例化对象，调用相关方法实现运行效果
Book bk = new Book("红楼梦","曹雪芹");
bk.setPress("人民文学出版社");
bk.setPrice(10);
bk.showInfo();
System.out.println("===============");
Book bk2 = new Book("小李飞刀","古龙");
bk2.setPress("中国长安出版社");
bk2.setPrice(55.5);
bk2.showInfo();
}
}
public class Book {
private String name,author,press;
private double price;
//通过构造方法实现属性赋值
public Book(){
}
public Book(String name,String author){
this.name = name;
this.author = author;
}
/*通过公有的get/set方法实现属性的访问，其中：
1、限定图书价格必须大于10，如果无效需进行提示，并强制赋值为10
*/
public void setPress(String press){
this.press = press;
}
public void setPrice(double price){
if(price<=10){
this.price=10;
System.out.println("图书价格最低10元");
}
else
this.price = price;
}
public String getName(){
return name;
}
public String getAuthor(){
return author;
}
public String getPress(){
return press;
}
public double getPrice(){
return price;
}
//信息介绍方法，描述图书所有信息
public void showInfo(){
System.out.println("书名:"+this.name);
System.out.println("出版社:"+this.press);
System.out.println("价格:"+this.price+"元");
}
}
public class BookTest { // 测试方法 public static void main(String[] args) { //实例化对象，调用相关方法实现运行效果 Book bk = new Book("红楼梦","曹雪芹"); bk.setPress("人民文学出版社"); bk.setPrice(10); bk.showInfo(); System.out.println("==============="); Book bk2 = new Book("小李飞刀","古龙"); bk2.setPress("中国长安出版社"); bk2.setPrice(55.5); bk2.showInfo(); } } public class Book { private String name,author,press; private double price; //通过构造方法实现属性赋值 public Book(){ } public Book(String name,String author){ this.name = name; this.author = author; } /*通过公有的get/set方法实现属性的访问，其中： 1、限定图书价格必须大于10，如果无效需进行提示，并强制赋值为10 */ public void setPress(String press){ this.press = press; } public void setPrice(double price){ if(price<=10){ this.price=10; System.out.println("图书价格最低10元"); } else this.price = price; } public String getName(){ return name; } public String getAuthor(){ return author; } public String getPress(){ return press; } public double getPrice(){ return price; } //信息介绍方法，描述图书所有信息 public void showInfo(){ System.out.println("书名:"+this.name); System.out.println("出版社:"+this.press); System.out.println("价格:"+this.price+"元"); } }