java - 如果日期错误，则不会打印出错误消息

Question

如果交易日期大于计算日期，我想返回消息“Date is very wrong”。相反，它只打印“-1 天”。

import java.text.SimpleDateFormat;
import java.util.Date;

public class Age {

    public static long computeAge(String transDate, String computeDate){
        SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy");

        long lapseDays = 0;

        try {
            Date TDate = format.parse(transDate);
            Date CDate = format.parse(computeDate);

            long aging = CDate.getTime() - TDate.getTime();
            lapseDays = aging/(24*60*60*1000);

        }catch (Exception e){
            e.printStackTrace();
            System.out.print("Date is very wrong"); 
        }

        return lapseDays;
    }
    public static void main(String[] args) {

        String transaction = "10/01/2014";
        String computation = "09/30/2014";
        System.out.println(computeAge(transaction, computation)+ " days");
    }
 }

Answer 1

如果我理解你的问题，你可以调用方法 Date.after(Date)和类似的东西

Date TDate = format.parse(transDate);
Date CDate = format.parse(computeDate);
if (TDate.after(CDate)) {
  System.out.print("Date is very wrong");
  return -1;
}