java 对象属性的传递和打印1

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


  public Book(String title,String author,double price){
this.title = title;
this.author = author;
this.price = price;
}
public String getTitle(){
return this.title;
}
public String getAuthor(){
return author;/*这个author 指的是成员变量，所以返回的是成员变量的值*/
}
public double getPrice(){
return price;
}


public static void main(String[]args){
Book book1 = new Book("<<Java 入门>>", "杨鹏" ,50);
Book book2 = new Book("<<C 入门>>","小马",2);
System.out.println("书名:" + book1.getTitle());
System.out.println("作者:" + book1.getAuthor());
System.out.println("价格:" + book1.getPrice());
System.out.println("书名:" + book2.getTitle());
System.out.println("作者:" + book2.getAuthor());
System.out.println("价格:" + book2.getPrice());
book1.price = 1;
System.out.println(book1.price);
}



}
可以使用构造方法，把对象的属性传给class.Book book1 = new Book("<<Java 入门>>", "杨鹏" ,50);

2.
import java.util.Scanner;
public class CelsiusConverter {
public double getFahrenheit(double celsius){
return  1.8 * celsius + 32;
//return fahrenheit;
}
public static void main(String[]args){
System.out.println("请输入要转换的温度（单位：摄氏度）");
Scanner input = new Scanner(System.in);
double celsiu = input.nextDouble();
CelsiusConverter converter = new CelsiusConverter();
System.out.println("转换完成的温度（单位：华氏度）" +  converter.getFahrenheit(celsiu));

}

}

可以用scanner的方法去输入，在主函数里一般要打印相应的值的，一般写出相应的方法converter.getFahrenheit(celsiu)，book2.getPrice()