Calendar类方法演示
获取当前的时间,按照自定义的方法来输出
import java.util.Calendar; public class ClenderDemos {/** *Calendar 类是一个抽象类,它为特定瞬间与一组诸如YEAR、MONTH、DAY_OF_MONTH、HOUR *等日历字段之间的转换提供了一些方法,并为操作日历字段(例如获得下星期的日期)提供了一些方法*/ public static void main(String[] args) { //创建一个Calendar实现对象 Calendar c = Calendar.getInstance(); method1(c); } private static void method1(Calendar c) { // int year = c.get(Calendar.YEAR); int month = c.get(Calendar.MONTH) + 1; int day = c.get(Calendar.DAY_OF_MONTH); int week = c.get(Calendar.DAY_OF_WEEK); System.out.println(year + "年\t" + month + "月\t" + day + "日\t" + getWeek(week)); } private static String getWeek(int week) { // TODO Auto-generated method stub String[] weeks = { "","星期日" ,"星期一" ,"星期二" ,"星期三" ,"星期四" ,"星期五" ,"星期六" }; return weeks[week]; } }
对其进行一些简单的设置
import java.util.Calendar; public class ClenderDemos {/** *Calendar 类是一个抽象类,它为特定瞬间与一组诸如YEAR、MONTH、DAY_OF_MONTH、HOUR *等日历字段之间的转换提供了一些方法,并为操作日历字段(例如获得下星期的日期)提供了一些方法*/ public static void main(String[] args) { //创建一个Calendar实现对象 Calendar c = Calendar.getInstance(); c.set(2015,6,17); c.add(Calendar.YEAR,-2); method1(c);//2013年 7月 17日 星期三 } private static void method1(Calendar c) { // int year = c.get(Calendar.YEAR); int month = c.get(Calendar.MONTH) + 1; int day = c.get(Calendar.DAY_OF_MONTH); int week = c.get(Calendar.DAY_OF_WEEK); System.out.println(year + "年\t" + month + "月\t" + day + "日\t" + getWeek(week)); } private static String getWeek(int week) { // TODO Auto-generated method stub String[] weeks = { "","星期日" ,"星期一" ,"星期二" ,"星期三" ,"星期四" ,"星期五" ,"星期六" }; return weeks[week]; } }
获取每年的二月有多少天
import java.util.Calendar; public class ClenderDemos {/** *Calendar 类是一个抽象类,它为特定瞬间与一组诸如YEAR、MONTH、DAY_OF_MONTH、HOUR *等日历字段之间的转换提供了一些方法,并为操作日历字段(例如获得下星期的日期)提供了一些方法*/ public static void main(String[] args) { //创建一个Calendar实现对象 Calendar c = Calendar.getInstance(); int year = 2016; method2(c,year);//2016年 2月 29日 星期一 } private static void method2(Calendar c,int year) { // TODO Auto-generated method stub c.set(year,2,1); c.add(Calendar.DAY_OF_MONTH,-1); int years = c.get(Calendar.YEAR); int month = c.get(Calendar.MONTH) + 1; int day = c.get(Calendar.DAY_OF_MONTH); int week = c.get(Calendar.DAY_OF_WEEK); System.out.println(years + "年\t" + month + "月\t" + day + "日\t" + getWeek(week)); }
时间: 2024-12-22 12:22:39