Question

JAVA的作业，求大神的帮忙，急等谢谢！

编写程序，首先定义一个类Book，类的属性包括title、author、press、price，成员方法包括构造方法、各属性的get方法和set方法、显示全部属性的方法Display()；然后在主类的main()函数中定义Book类的一个对象book，对象的书名为“大数据技术”，作者为“黄宜华”，出版社为“高教出版社”，价格为89元，并调用对象的Display()方法显示对象的全部信息。

Answer 1

Java代码：

class Book {
	protected String title;
	protected String author;
	protected String press;
	protected double price;
	
	public Book(String title, String author, String press, double price) {
		this.title = title;
		this.author = author;
		this.press = press;
		this.price = price;
	}
	
	public String getTitle() {
		return this.title;
	}
	
	public void setTitle(String title) {
		this.title = title;
	}
	
	public String getAuthor() {
		return this.author;
	}
	
	public void setAuthor(String author) {
		this.author = author;
	}
	
	public String getPress() {
		return this.press;
	}
	
	public void setPress(String press) {
		this.press = press;
	}
	
	public double getPrice() {
		return this.price;
	}
	
	public void setPrice(double price) {
		this.price = price;
	}
	
	public void display() {
		System.out.println("Book info：");
		System.out.println("Title：\t" + title);
		System.out.println("Author：\t" + author);
		System.out.println("Press：\t" + press);
		System.out.println("Price：\t" + price);
	}
}

public class Test {
	public static void main(String[] args) {
		Book book = new Book("大数据技术", "黄宜华", "高教出版社", 89);
		book.display();
	}
}

运行效果：

Book info：

Title： 大数据技术

Author： 黄宜华

Press： 高教出版社

Price： 89.0

Answer 2

public class Book {
private String title;
private String author;
private String press;
private double price;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public String getPress() {
return press;
}
public void setPress(String press) {
this.press = press;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}

public void Display(){
System.out.println("title:"+this.title);
System.out.println("author:"+this.author);
System.out.println("press:"+this.press);
System.out.println("price:"+this.price);
}
public static void main(String[] args) {
Book book = new Book();
book.setAuthor("黄宜华");
book.setTitle("大数据技术");
book.setPress("高教出版社");
book.setPrice(89);
book.Display();
}
}

Answer 3

public class Book {
private String title;
private String author;
private String press;
private String price;

public Book(){}

/**
*
* @param title
* @param author
* @param press
* @param price
*/
public Book(String title,String author,String press,String price){
this.author=author;
this.title=title;
this.press=press;
this.price=price;
}

public void Display(){
System.out.println("书名："+this.title);
System.out.println("作者："+this.author);
System.out.println("出版社："+this.press);
System.out.println("价格："+this.price+"元");
}

public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

public String getAuthor() {
return author;
}

public void setAuthor(String author) {
this.author = author;
}

public String getPress() {
return press;
}

public void setPress(String press) {
this.press = press;
}

public String getPrice() {
return price;
}

public void setPrice(String price) {
this.price = price;
}

public static void main(String args[]) {
Book book=new Book("大数据技术","黄宜华","高教出版社","98");
book.Display();
}
}