java同一文件不能有两个类？
《重构》中的开始的代码如下：
/*
* Main.java
*
* Created on 2008年6月5日, 下午6:25
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package statement;
import java.util.Enumeration;
import java.util.Vector;
/**
*
* @author Administrator
*/
public class Main {
/** Creates a new instance of Main */
public Main() {
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
}
}
public class Movie
{
public static final int CHILDRENS = 2;
public static final int REGULAR = 0;
public static final int NEW_RELEASE = 1;
private String _title; //名称
private int _priceCode; //价格（代号）
public Movie(String title, int priceCode)
{
_title = title;
_priceCode = priceCode;
}
public int getPriceCode()
{
return _priceCode;
}
public void setPriceCode(int arg)
{
_priceCode = arg;
}
public String getTitle()
{
return _title;
}
}
class Rental
{
private Movie _movie;
private int _daysRented;
public Rental(Movie movie,int daysRented)
{
_movie = movie;
_daysRented = daysRented;
}
public int getDaysrented()
{
return _daysRented;
}
public Movie getMovie()
{
return _movie;
}
}
class Customer
{
private String _name; //姓名
private Vector _rentals = new Vector(); //租赁记录
public Customer(String name)
{
_name = name;
}
public void addRental(Rental arg)
{
_rentals.addElement(arg);
}
public String getName()
{
return _name;
}
public String statement()
{
double totalAmount = 0; //总消费金额
int frequentRenterPoints = 0;
Enumeration rentals = _rentals.elements();
String result = "Rental Record for" + getName() + "\n";
while(rentals.hasMoreElements())
{
double thisAmount = 0;
Rental each = (Rental) rentals.nextElement();
//determine amounts ofr each line
switch(each.getMovie().getPriceCode())
{
case Movie.REGULAR: //普通片
thisAmount += 2;
if(each.getDaysrented()>2)
thisAmount += (each.getDaysrented()-2)*1.5;
break;
case Movie.NEW_RELEASE: //新片
thisAmount += each.getDaysrented()*3;
break;
case Movie.CHILDRENS: //儿童片
thisAmount += 1.5;
if(each.getDaysrented()>3)
thisAmount += (each.getDaysrented()-3)*1.5;
break;
}
//add frequent renter points (累加 常客积点)
frequentRenterPoints++;
//add bonus for a two day new release rental
if((each.getMovie().getPriceCode() == Movie.NEW_RELEASE) &&
each.getDaysrented() >1)
frequentRenterPoints ++;
result += "\t"+each.getMovie().getTitle()+"\t" +
String.valueOf(thisAmount) + "\n";
totalAmount += thisAmount;
}
//add footer lines (结尾打印)
result += "Amount owed is " + String.valueOf(totalAmount) + "\n";
result += "You earned" + String.valueOf(frequentRenterPoints) +
"frequent renter points \n";
return result;
}
}
用NetBeans编译，为什么提示说 movie class应在文件中声明？
如何改正，还有这个没有主函数的程序能运行吗？
[解决办法]
如何改正，还有这个没有主函数的程序能运行吗？
－－－－－－－－－－－－－－－－－－－－－－－－
Main class里面不是有主函数吗，在里面写
Customer c=new Customer("123");
c.***
不就运行起来了。
[解决办法]
就把
public class Movie
改掉就可以了,你的两个问题是一个嘛,
没有主函数当然不能运行.
