我有一个构造函数,该构造函数接受一个String并将该String转换为日期。但是,当我运行主代码时,会得到不正确的随机日期。我做了一个测试类,只是为了测试构造函数中的代码,并且一切运行正常,我得到了适当的输出。但是,我的getter方法给我错误的日期。另外,if语句也不检查我的参数的有效性。不知道如何解决它。
import java.util.Calendar;
import java.util.Date;
import java.lang.Integer;
public class RealEstateSale{
private String country;
private double price;
private Date dateOfSale;
CurrencyConverter cc = new CurrencyConverter();
public String getCountry(){
return country;
}
public RealEstateSale(double price){
this.price = price;
if(price < 0){
country = null;
}
}
public double getPrice(){
return price;
}
public RealEstateSale(String country, String date){
this.country = country;
String [] tokens = date.split("/");
int month = Integer.parseInt(tokens[0]);
int day = Integer.parseInt(tokens[1]);
int year = Integer.parseInt(tokens[2]);
Calendar dateMaker = Calendar.getInstance();
dateMaker.set(year, month-1, day);
dateOfSale = dateMaker.getTime();
if(0 > year || 0 > month || 0 > day){
this.country = null;
} else if (month > 11){
this.country = null;
} else if(day > 31){
this.country = null;
} else if (!cc.countryCodes.contains(country)){
this.country = null;
}
}
public Date getDate(){
return dateOfSale;
}
}
所以可以说我输入日期1/10/1997,我得到日期4/20/0007。我不知道这个日期是哪里来的。
答案 0 :(得分:2)
如果您的Java版本支持它,我建议您使用LocalDate而不是Calendar / Date
private LocalDate dateOfSale;
...
public RealEstateSale(String country, String date){
this.country = country;
String [] tokens = date.split("/");
int month = Integer.parseInt(tokens[0]);
int day = Integer.parseInt(tokens[1]);
int year = Integer.parseInt(tokens[2]);
dateOfSale = LocalDate.of(year, month, day);
...
}
如果您需要将dateOfSale
声明为Date
,则仍然可以跳过Calendar
LocalDate localDate = LocalDate.of(year, month, day);
dateOfSale = Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant());
从this answer转换