求各位大神指条明路
car.java:33: error: constructor carloan in class carloan cannot be applied to given types;
carloan vn= new carloan(price, downpayment);
            ^
  required: no arguments
  found: double,double
  reason: actual and formal argument lists differ in length
1 error

这个是我的error.

import java.util.Scanner;



public class car{

	public static void main(String[] args){

		double price;

		double downpayment;

		double interest;

		int months;

		int payment;



	Scanner in= new Scanner(System.in);



System.out.print("Please enter the car price: ");

price=in.nextDouble();

System.out.println();



System.out.print("Please enter the amount of downpayment: ");

downpayment=in.nextDouble();

System.out.println();



System.out.print("Please enter the annual interest rate: ");

interest=in.nextDouble();

System.out.println();



System.out.print("Please enter the loan period in months: ");

months=in.nextInt();

System.out.println();



System.out.print("Please enter the number of payments you have paid: ");

payment=in.nextInt();

System.out.println();



carloan vn= new carloan(price, downpayment);



System.out.print("The amount borrowed is: "+ vn.getamountborrowed());

System.out.print("The monthly payment amount is: "+ vn.getmonthlyrate());

}}

public class carloan{

	private double price;

	private double downpayment;

	private double interest;

	private int months;



public double getamountborrowed(){

	return price-downpayment;

}



public double getmonthlyrate(){

			double P=price-downpayment;

			double R=interest/12;

			double B=1+R;

			double C= Math.pow(B,months);

			double D=R*C;

			double E=C-1;

			double F=D/E*P;

			return price;

}}

我想知道为什么会出现这样的error.
------解决方案--------------------
构造方法可以理解为是为了初始化数据，就是这样：

public carloan(double price,double downpayment)

	{

		this.price = price;

		this.downpayment = downpayment;

	}

学Java怎么会不知道构造方法呢？建议找本书看看，这是Java最基础的东西！