Java.util.GregorianCalendar.get ActualMaximum() 方法 Java.util.EnumSet.copyOf() 方法 Java.util.EnumSet.copyOf() 方法示例 Java.util.GregorianCalendar.get ActualMaximum() 方法 package com.codingdict; import java.util.*; public class GregorianCalendarDemo { public static void main(String[] args) { // create a new calendar GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance(); // print the current date and time System.out.println("" + cal.getTime()); // get actual maximum for day_of_month int max = cal.getActualMaximum(GregorianCalendar.DAY_OF_MONTH); System.out.println("Actual Maximum:" + max); // get actual maximum for YEAR max = cal.getActualMaximum(GregorianCalendar.YEAR); System.out.println("Actual Maximum:" + max); } } Java.util.EnumSet.copyOf() 方法 Java.util.EnumSet.copyOf() 方法示例