代码重构源码（包含重构前后代码）

package Du; import java.util.Enumeration; import java.util.Vector; import java.util.Enumeration; public class Customer { public Customer(String name) { super(); _name = name; } private String _name; // 姓名 public String getName() { return _name; } private Vector _rentals = new Vector(); // 租借記錄 public void addRental(Rental arg) { _rentals.addElement(arg); } public String statement(){ double totalAmount = 0; int frequentRenterPoints = 0; Enumeration rentalss = _rentals.elements(); String result = "Rental Record for" +" "+ getName()+"\n"; while(rentalss.hasMoreElements()) { double thisAmount = 0; Rental each = (Rental) rentalss.nextElement(); switch(each.getMovie().getPriceCode()) { case Movie.REGULAR: thisAmount += 2; if(each.getDaysRented()>2) thisAmount += (each.getDaysRented()-2)*1.5; break; case Movie.NEW_RELEASE: thisAmount += each.getDaysRented()*3; break; case Movie.CHILDRENS: thisAmount += 1.5; if(each.getDaysRented()>3) thisAmount += (each.getDaysRented()-3)*1.5; break; } //积分 每借一张加1个积分 frequentRenterPoints++; //积分累加条件 新版本的片子，借的时间大于1天 if((each.getMovie().getPriceCode()==Movie.NEW_RELEASE)&&each.getDaysRented()>1) { frequentRenterPoints++; } result +="\t" +each.getMovie().getTitle()+"\t" +String.valueOf(thisAmount)+"\n"; totalAmount += thisAmount; } result += "Amount owed is "+ String.valueOf(totalAmount)+"\n"; result +="You earned "+String.valueOf(frequentRenterPoints)+" " +"frequent renter points"; return result; } }