package com.sise.java.lab3.test;

import com.sise.java.lab3.Book;

public class BookTest {

 public static void main(String args[]){
  Book bk1=new Book("Java核心编程技术","张屹","大连理工大学出版社","978-7-5611-5767-1",45);
  System.out.println("访问器输出图书信息：");
  System.out.println(bk1.getBookname());
  System.out.println(bk1.getAuthor());
  System.out.println(bk1.getPress());
  System.out.println(bk1.getIsbn());
  System.out.println(bk1.getPrice());
  
  System.out.println("ntoString()方法输出图书信息：");
  System.out.println(bk1.toString());
  
  Book bk2=new Book();
  bk2.setBookname("Web前端开发技术--HTML、CSS、JavaScript");
  bk2.setAuthor("聂常红");
  bk2.setIsbn("987-7-115-42666-6");
  bk2.setPrice(54.0f);
  System.out.println("n对象.display()方法：");
  bk2.display(bk2);
  System.out.println("n类名.display()方法：");
  Book.display(bk2);

  System.out.println("ntoString()方法输出图书信息：");
  Book bk3= new Book("前端HTMl+CSS修炼之道","聂常红","987-7-115-46167-4",89);
  System.out.println(bk3.toString());
  System.out.println("n对象.count方法：");
  System.out.println("现在有"+bk3.count+"本图书");
  System.out.println("n类名.count方法：");
  System.out.println("现在有"+Book.count+"本图书");
  }
}

package com.sise.java.lab3.test;

public class Book{
  private String bookname;
  private String author;
  private String press;
  private String isbn;
  private float price;
  public static int count;
  
  public void setBookname(String bookname){
   this.bookname=bookname;
  }
  public void setAuthor(String author){
   this.author=author;
  }
  public void setPress(String press){
   this.press=press;
  }
  public void setIsbn(String isbn){
   this.isbn=isbn;
  }
  public void setPrice(float price){
   this.price=price;
  }
  public String getBookname(){
   return bookname;
  }
  public String getAuthor(){
   return author;
  }
  public String getPress(){
   return press;
  }
  public String getIsbn(){
   return isbn;
  }
  public float getPrice(){
   return price;
  }
  
  //5参构造器
  public Book(String bookname,String author,String press,String isbn,float price){
   this.bookname=bookname;
   this.author=author;
   this.press=press;
   this.isbn=isbn;
   this.price=price;
   count++;
  }

  //默认构造器
  public Book(){
   press="人民邮电出版社";
   count++;
  }
  //4参构造器
  public Book(String bookname,String author,String isbn,float price){
   this.bookname=bookname;
   this.author=author;
   press="人民邮电出版社";
   this.isbn=isbn;
   this.price=price;
   count++;
  }
  //重写toString()方法,返回图书的各项信息
  public String toString(){
   return ("书名："+bookname+"n作者："+author+"n出版社："+press+"nISBN："+isbn+"n价格："+price);
  }
  //display()方法输出图书信息
  public static void display(Book bk){
   if(bk!=null)
    System.out.println("书名："+bk.getBookname()+"n作者："+bk.getAuthor()+"n出版社："+bk.getPress()+"nISBN号："+bk.getIsbn()+"n价格："+bk.getPrice());
  }
}