//日历类
1.日历类的获取
package com.hero;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class CalendarDemo {

public static<T> void sop(T t){
    
    System.out.println(t);
}

public static void main(String[] args) {
    Calendar c = Calendar.getInstance();//默认时区和语言环境获得一个日历
    
    String[] mons = {"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};
    
    String[] weks = {"星期一","星期二","星期三","星期四","星期五","星期六","星期日"};
    
    int index1 = c.get(Calendar.MONTH);//获得这个月,0代表1月
    
    int index2 = c.get(Calendar.DAY_OF_WEEK);//获得这个星期的第几天
    
    sop(c.get(Calendar.YEAR)+"年");//返回当前年
    
    sop(c.get(Calendar.MONTH)+1+"月");
    
    sop(mons[index1]);
    
    sop(c.get(Calendar.DAY_OF_MONTH));//返回这个月的天数
    
    sop(c.get(Calendar.HOUR)+"时");
    
    sop(c.get(Calendar.MINUTE)+"分");
    
    sop(c.get(Calendar.SECOND)+"秒");
    
    sop(weks[index2-2]);
    
    sop(c.get(Calendar.DAY_OF_WEEK));
    
    sop(c.getTimeInMillis());//获得当前类的毫秒数
    
    Date d = new Date();//格式化输出日期
    
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    
    String year = sdf.format(d);
    
    System.out.println("今天的日期为："+year);

}

}
2.日历类的设置
package com.hero;

import java.util.Calendar;

public class CalendarDemo2 {

public static<T> void sop(T t) {
    
    System.out.println(t);
}

public static void printCalendar(Calendar c){
    
    sop(c.get(Calendar.YEAR)+"年");
    
    sop(c.get(Calendar.MONTH)+"月");
    
    sop(c.get(Calendar.DAY_OF_MONTH)+"日");
    
    sop(c.get(Calendar.DAY_OF_WEEK)-1);
}

public static void main(String[] args) {
    
    Calendar c = Calendar.getInstance();
    
    c.set(2018,10,29);
    
    printCalendar(c);
    
}

}
//学习自云栖社区：吞吞吐吐的