Calendar.DAy_OF_WEEK的打印,该怎么处理

Calendar.DAy_OF_WEEK的打印
本帖最后由 u012432248 于 2013-12-03 12:09:51 编辑

public class CalendarTest
{
public static void main(String[] args)
{
GregorianCalendar d = new GregorianCalendar();
int today = d.get(Calendar.DAY_OF_MONTH);
int month = d.get(Calendar.MONTH);
d.set(Calendar.DAY_OF_MONTH, 1);
int weekday = d.get(Calendar.DAY_OF_WEEK);
System.out.println("   " + weekday); // 打印出来的是1 12月1日星期天
System.out.println("hjahah" + Calendar.DAY_OF_WEEK); 
// 打印出来的是7，d.set屏蔽掉直接打印Calendar.DAY_OF_WEEK也是7 为什么？不一样，这里的和
//上一句打印的不是同一内容，麻烦大神们给解释下.
}
}

[解决办法]

GregorianCalendar d = new GregorianCalendar();
int weekday = d.get(Calendar.DAY_OF_WEEK);
System.out.println("   " + weekday);
d.set(Calendar.DAY_OF_MONTH, 1);
System.out.println("hjahah" + d.get(Calendar.DAY_OF_WEEK));

System.out.println("hjahah" + Calendar.DAY_OF_WEEK); //这样是打印Calendar的一个常量：DAY_OF_WEEK，当然是7了。
[解决办法]
Calendar.DAY_OF_WEEK、、

DAY_OF_WEEK
public static final int DAY_OF_WEEKget 和 set 的字段数字，指示一个星期中的某天。该字段可取的值为 SUNDAY、MONDAY、TUESDAY、WEDNESDAY、THURSDAY、FRIDAY 和 SATURDAY。

楼主查一下API
[解决办法]
楼主没有看Calendar类的实现吧，下面是一段代码：

/**
     * Field number for &lt;code&gt;get&lt;/code&gt; and &lt;code&gt;set&lt;/code&gt; indicating the
     * era, e.g., AD or BC in the Julian calendar. This is a calendar-specific
     * value; see subclass documentation.
     *
     * @see GregorianCalendar#AD
     * @see GregorianCalendar#BC
     */
    public final static int ERA = 0;

    /**
     * Field number for &lt;code&gt;get&lt;/code&gt; and &lt;code&gt;set&lt;/code&gt; indicating the
     * year. This is a calendar-specific value; see subclass documentation.
     */
    public final static int YEAR = 1;

    /**
     * Field number for &lt;code&gt;get&lt;/code&gt; and &lt;code&gt;set&lt;/code&gt; indicating the
     * month. This is a calendar-specific value. The first month of
     * the year in the Gregorian and Julian calendars is
     * &lt;code&gt;JANUARY&lt;/code&gt; which is 0; the last depends on the number
     * of months in a year.
     *
     * @see #JANUARY
     * @see #FEBRUARY
     * @see #MARCH
     * @see #APRIL
     * @see #MAY
     * @see #JUNE
     * @see #JULY
     * @see #AUGUST
     * @see #SEPTEMBER
     * @see #OCTOBER
     * @see #NOVEMBER
     * @see #DECEMBER
     * @see #UNDECIMBER
     */
    public final static int MONTH = 2;

    /**
     * Field number for &lt;code&gt;get&lt;/code&gt; and &lt;code&gt;set&lt;/code&gt; indicating the
     * week number within the current year.  The first week of the year, as
     * defined by &lt;code&gt;getFirstDayOfWeek()&lt;/code&gt; and 
 
     * &lt;code&gt;getMinimalDaysInFirstWeek()&lt;/code&gt;, has value 1.  Subclasses define
     * the value of &lt;code&gt;WEEK_OF_YEAR&lt;/code&gt; for days before the first week of
     * the year.
     *
     * @see #getFirstDayOfWeek
     * @see #getMinimalDaysInFirstWeek
     */
    public final static int WEEK_OF_YEAR = 3;

    /**
     * Field number for &lt;code&gt;get&lt;/code&gt; and &lt;code&gt;set&lt;/code&gt; indicating the
     * week number within the current month.  The first week of the month, as
     * defined by &lt;code&gt;getFirstDayOfWeek()&lt;/code&gt; and
     * &lt;code&gt;getMinimalDaysInFirstWeek()&lt;/code&gt;, has value 1.  Subclasses define
     * the value of &lt;code&gt;WEEK_OF_MONTH&lt;/code&gt; for days before the first week of
     * the month.
     *
     * @see #getFirstDayOfWeek
     * @see #getMinimalDaysInFirstWeek
     */
    public final static int WEEK_OF_MONTH = 4;

    /**
     * Field number for &lt;code&gt;get&lt;/code&gt; and &lt;code&gt;set&lt;/code&gt; indicating the
     * day of the month. This is a synonym for &lt;code&gt;DAY_OF_MONTH&lt;/code&gt;.
     * The first day of the month has value 1.
     *
     * @see #DAY_OF_MONTH
     */
    public final static int DATE = 5;

    /**
     * Field number for &lt;code&gt;get&lt;/code&gt; and &lt;code&gt;set&lt;/code&gt; indicating the
     * day of the month. This is a synonym for &lt;code&gt;DATE&lt;/code&gt;.
     * The first day of the month has value 1.
     *
     * @see #DATE
     */
    public final static int DAY_OF_MONTH = 5;

    /**
     * Field number for &lt;code&gt;get&lt;/code&gt; and &lt;code&gt;set&lt;/code&gt; indicating the day
     * number within the current year.  The first day of the year has value 1.
     */
    public final static int DAY_OF_YEAR = 6;

    /**
     * Field number for &lt;code&gt;get&lt;/code&gt; and &lt;code&gt;set&lt;/code&gt; indicating the day
     * of the week.  This field takes values &lt;code&gt;SUNDAY&lt;/code&gt;,
     * &lt;code&gt;MONDAY&lt;/code&gt;, &lt;code&gt;TUESDAY&lt;/code&gt;, &lt;code&gt;WEDNESDAY&lt;/code&gt;,
     * &lt;code&gt;THURSDAY&lt;/code&gt;, &lt;code&gt;FRIDAY&lt;/code&gt;, and &lt;code&gt;SATURDAY&lt;/code&gt;.
     *
     * @see #SUNDAY
     * @see #MONDAY
     * @see #TUESDAY
     * @see #WEDNESDAY
     * @see #THURSDAY
     * @see #FRIDAY
     * @see #SATURDAY
     */
    public final static int DAY_OF_WEEK = 7;

Calendar类里面有一系列的int类型的常量，这些常量是配合get和set方法使用的一种标志，比如我去用一个Calendar的实例去get的时候，那么我们就需要传入一个标志，比如我们传DAY_OF_WEEK，是告诉jvm我们想从Calendar对象中获取对象所封装的天在星期中是第几天。如果单纯用Calendar类去调用这些常量的时候，就是返回的一个固定标识。
不知道我讲清楚了吗，希望楼主学习进步~

Calendar.DAy_OF_WEEK的打印,该怎么处

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