gregoriancalendar.html

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     System.exit(0);

  // begin output
 System.out.println("Current Time");

 // create a Pacific Standard Time time zone
 SimpleTimeZone pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, ids[0]);

 // set up rules for daylight savings time
 pdt.setStartRule(Calendar.APRIL, 1, Calendar.SUNDAY, 2 * 60 * 60 * 1000);
 pdt.setEndRule(Calendar.0ctober, -1, Calendar.SUNDAY, 2 * 60 * 60 * 1000);

 // create a GregorianCalendar with the Pacific Daylight time zone
 // and the current date and time
 Calendar calendar = new GregorianCalendar(pdt);
 Date trialTime = new Date();
 calendar.setTime(trialTime);

 // print out a bunch of interesting things
 System.out.println("ERA: " + calendar.get(Calendar.ERA));
 System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
 System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
 System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
 System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
 System.out.println("DATE: " + calendar.get(Calendar.DATE));
 System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
 System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
 System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
 System.out.println("DAY_OF_WEEK_IN_MONTH: "
                    + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
 System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
 System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
 System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
 System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
 System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
 System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
 System.out.println("ZONE_OFFSET: "
                    + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000)));
 System.out.println("DST_OFFSET: "
                    + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000)));

 System.out.println("Current Time, with hour reset to 3");
 calendar.clear(Calendar.HOUR_OF_DAY); // so doesn't override
 calendar.set(Calendar.HOUR, 3);
 System.out.println("ERA: " + calendar.get(Calendar.ERA));
 System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
 System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
 System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
 System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
 System.out.println("DATE: " + calendar.get(Calendar.DATE));
 System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
 System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
 System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
 System.out.println("DAY_OF_WEEK_IN_MONTH: "
                    + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
 System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
 System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
 System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
 System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
 System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
 System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
 System.out.println("ZONE_OFFSET: "
        + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000))); // in hours
 System.out.println("DST_OFFSET: "
        + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); // in hours
 </pre>
 </blockquote>
<P>

<P>
<DL>
<DT><B>从以下版本开始：</B></DT>
  <DD>JDK1.1</DD>
<DT><B>另请参见：</B><DD><A HREF="TimeZone.html" title="java.util 中的类"><CODE>TimeZone</CODE></A>, 
<A HREF="../../serialized-form.html#java.util.GregorianCalendar">序列化表格</A></DL>
<HR>

<P>
<!-- =========== FIELD SUMMARY =========== -->

<A NAME="field_summary"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>字段摘要</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="GregorianCalendar.html#AD">AD</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<code>ERA</code> 字段的值指示公元后（耶稣纪元后）的时期（也称为 CE）。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="GregorianCalendar.html#BC">BC</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<code>ERA</code> 字段的值指示公元前（Christ 前）的时期（也称为 BCE）。</TD>
</TR>
</TABLE>
&nbsp;<A NAME="fields_inherited_from_class_java.util.Calendar"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>从类 java.util.<A HREF="Calendar.html" title="java.util 中的类">Calendar</A> 继承的字段</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="Calendar.html#AM">AM</A>, <A HREF="Calendar.html#AM_PM">AM_PM</A>, <A HREF="Calendar.html#APRIL">APRIL</A>, <A HREF="Calendar.html#areFieldsSet">areFieldsSet</A>, <A HREF="Calendar.html#AUGUST">AUGUST</A>, <A HREF="Calendar.html#DATE">DATE</A>, <A HREF="Calendar.html#DAY_OF_MONTH">DAY_OF_MONTH</A>, <A HREF="Calendar.html#DAY_OF_WEEK">DAY_OF_WEEK</A>, <A HREF="Calendar.html#DAY_OF_WEEK_IN_MONTH">DAY_OF_WEEK_IN_MONTH</A>, <A HREF="Calendar.html#DAY_OF_YEAR">DAY_OF_YEAR</A>, <A HREF="Calendar.html#DECEMBER">DECEMBER</A>, <A HREF="Calendar.html#DST_OFFSET">DST_OFFSET</A>, <A HREF="Calendar.html#ERA">ERA</A>, <A HREF="Calendar.html#FEBRUARY">FEBRUARY</A>, <A HREF="Calendar.html#FIELD_COUNT">FIELD_COUNT</A>, <A HREF="Calendar.html#fields">fields</A>, <A HREF="Calendar.html#FRIDAY">FRIDAY</A>, <A HREF="Calendar.html#HOUR">HOUR</A>, <A HREF="Calendar.html#HOUR_OF_DAY">HOUR_OF_DAY</A>, <A HREF="Calendar.html#isSet">isSet</A>, <A HREF="Calendar.html#isTimeSet">isTimeSet</A>, <A HREF="Calendar.html#JANUARY">JANUARY</A>, <A HREF="Calendar.html#JULY">JULY</A>, <A HREF="Calendar.html#JUNE">JUNE</A>, <A HREF="Calendar.html#MARCH">MARCH</A>, <A HREF="Calendar.html#MAY">MAY</A>, <A HREF="Calendar.html#MILLISECOND">MILLISECOND</A>, <A HREF="Calendar.html#MINUTE">MINUTE</A>, <A HREF="Calendar.html#MONDAY">MONDAY</A>, <A HREF="Calendar.html#MONTH">MONTH</A>, <A HREF="Calendar.html#NOVEMBER">NOVEMBER</A>, <A HREF="Calendar.html#OCTOBER">OCTOBER</A>, <A HREF="Calendar.html#PM">PM</A>, <A HREF="Calendar.html#SATURDAY">SATURDAY</A>, <A HREF="Calendar.html#SECOND">SECOND</A>, <A HREF="Calendar.html#SEPTEMBER">SEPTEMBER</A>, <A HREF="Calendar.html#SUNDAY">SUNDAY</A>, <A HREF="Calendar.html#THURSDAY">THURSDAY</A>, <A HREF="Calendar.html#time">time</A>, <A HREF="Calendar.html#TUESDAY">TUESDAY</A>, <A HREF="Calendar.html#UNDECIMBER">UNDECIMBER</A>, <A HREF="Calendar.html#WEDNESDAY">WEDNESDAY</A>, <A HREF="Calendar.html#WEEK_OF_MONTH">WEEK_OF_MONTH</A>, <A HREF="Calendar.html#WEEK_OF_YEAR">WEEK_OF_YEAR</A>, <A HREF="Calendar.html#YEAR">YEAR</A>, <A HREF="Calendar.html#ZONE_OFFSET">ZONE_OFFSET</A></CODE></TD>
</TR>
</TABLE>
&nbsp;
<!-- ======== CONSTRUCTOR SUMMARY ======== -->

<A NAME="constructor_summary"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>构造方法摘要</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="GregorianCalendar.html#GregorianCalendar()">GregorianCalendar</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在具有默认语言环境的默认时区内使用当前时间构造一个默认的 <code>GregorianCalendar</code>。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="GregorianCalendar.html#GregorianCalendar(int, int, int)">GregorianCalendar</A></B>(int&nbsp;year,
                  int&nbsp;month,
                  int&nbsp;dayOfMonth)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在具有默认语言环境的默认时区内构造一个带有给定日期设置的 <code>GregorianCalendar</code>。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="GregorianCalendar.html#GregorianCalendar(int, int, int, int, int)">GregorianCalendar</A></B>(int&nbsp;year,
                  int&nbsp;month,
                  int&nbsp;dayOfMonth,
                  int&nbsp;hourOfDay,
                  int&nbsp;minute)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;为具有默认语言环境的默认时区构造一个具有给定日期和时间设置的 <code>GregorianCalendar</code>。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="GregorianCalendar.html#GregorianCalendar(int, int, int, int, int, int)">GregorianCalendar</A></B>(int&nbsp;year,
                  int&nbsp;month,
                  int&nbsp;dayOfMonth,
                  int&nbsp;hourOfDay,
                  int&nbsp;minute,
                  int&nbsp;second)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;为具有默认语言环境的默认时区构造一个具有给定日期和时间设置的 GregorianCalendar。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="GregorianCalendar.html#GregorianCalendar(java.util.Locale)">GregorianCalendar</A></B>(<A HREF="Locale.html" title="java.util 中的类">Locale</A>&nbsp;aLocale)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在具有给定语言环境的默认时区内构造一个基于当前时间的 <code>GregorianCalendar</code>。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="GregorianCalendar.html#GregorianCalendar(java.util.TimeZone)">GregorianCalendar</A></B>(<A HREF="TimeZone.html" title="java.util 中的类">TimeZone</A>&nbsp;zone)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在具有默认语言环境的给定时区内构造一个基于当前时间的 <code>GregorianCalendar</code>。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="GregorianCalendar.html#GregorianCalendar(java.util.TimeZone, java.util.Locale)">GregorianCalendar</A></B>(<A HREF="TimeZone.html" title="java.util 中的类">TimeZone</A>&nbsp;zone,
                  <A HREF="Locale.html" title="java.util 中的类">Locale</A>&nbsp;aLocale)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在具有给定语言环境的给定时区内构造一个基于当前时间的 <code>GregorianCalendar</code>。</TD>
</TR>
</TABLE>
&nbsp;
<!-- ========== METHOD SUMMARY =========== -->

<A NAME="method_summary"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>方法摘要</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="GregorianCalendar.html#add(int, int)">add</A></B>(int&nbsp;field,
    int&nbsp;amount)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;根据日历规则，将指定的（有符号的）时间量添加到给定的日历字段中。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../lang/Object.html" title="java.lang 中的类">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="GregorianCalendar.html#clone()">clone</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;创建并返回此对象的一个副本。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="GregorianCalendar.html#computeFields()">computeFields</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;将时间值（从 <a
 href="Calendar.html#Epoch">Epoch</a> 至现在的毫秒偏移量）转换为日历字段值。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="GregorianCalendar.html#computeTime()">computeTime</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;将日历字段值转换为时间值（从 <a href="Calendar.html#Epoch">Epoch</a> 至现在的毫秒偏移量）。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="GregorianCalendar.html#equals(java.lang.Object)">equals</A></B>(<A HREF="../lang/Object.html" title="java.lang 中的类">Object</A>&nbsp;obj)</CODE>