日历构造函数 Java toString

问题描述

我要做的是将日期传递到日历中，以便它将格式化日期以供另一个构造函数使用.这样我以后可以使用日历提供的功能来使用它.

What I'm trying to do is pass a date into the Calendar so that it will format the date ready for use with another constructor. So that i can make use of it later using the functions that calendar has provides.

public class Top {
public static void main(String[] args) {
    Something st = new Something(getCalendar(20,10,2012));       
    System.out.println(st.toString());       
    }

public static Calendar getCalendar(int day, int month, int year){
    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.YEAR, year);
    cal.set(Calendar.MONTH, month);
    cal.set(Calendar.DAY_OF_MONTH, day);
    return cal;
    }
}

tostring 方法.

The tostring method.

public String toString(){
    String s = "nDate: " + DateD;
    return s;
}

日期:java.util.GregorianCalendar[time=?,areFieldsSet=false,areAllFieldsSet=true,lenient=true

Date: java.util.GregorianCalendar[time=?,areFieldsSet=false,areAllFieldsSet=true,lenient=true

而不是日期:20/10/2012

Rather than Date: 20/10/2012

推荐答案

假设 DateD 为 Calendar ，则默认为 toString() 实现.您需要调用 getTime() 来获取 date.

Assuming DateD is Calendar , it is default toString() implementation. You need to call getTime() to get the date out of it.

来自 日历#toString()

返回此日历的字符串表示形式.此方法仅用于调试目的，返回字符串的格式可能因实现而异.返回的字符串可能为空但不能为空.

Return a string representation of this calendar. This method is intended to be used only for debugging purposes, and the format of the returned string may vary between implementations. The returned string may be empty but may not be null.

您可以使用 SimpleDateFormat 进行转换它到 String

You can use SimpleDateFormat to convert it to String

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