Calendar日历的使用

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package test;import java.sql.Date;import java.text.SimpleDateFormat;import java.util.Calendar;/** * @author M子C虫M * 当前时间showNow(); * 2016年10月26日14:27星期三 */public class MyCalendar{    //获取日期    public String getDate(){        //str="2016年10月26日"   get月份+1        Calendar cdar = Calendar.getInstance();        String str = cdar.get(Calendar.YEAR)+"年"+(cdar.get(Calendar.MONTH)+1)+"月"+cdar.get(Calendar.DAY_OF_MONTH)+"日";//      //long 1477463302141L//      long sDate = Calendar.getInstance().getTimeInMillis();//      //Date 2016-10-26//      Date d = new Date(sDate);//      //str="20161026"//      SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");//      String str = sdf.format(d);        return str;    }    //获取时间    public String getTime(){        //Wed Oct 26 14:27:28 CST 2016        String time = ""+Calendar.getInstance().getTime();        return time.substring(11,16);    }    //获取时间加上秒    public String getTimeAndSecond(){        return String.valueOf(Calendar.getInstance().getTime()).substring(11,19);    }    //获取星期    public String getWeekdays(){        String week = null;        //星期三,4,一周的第一天是sunday        int weekdays = Calendar.getInstance().get(Calendar.DAY_OF_WEEK);        switch (weekdays) {            case 1: week="星期日"; break;            case 2: week="星期一"; break;            case 3: week="星期二"; break;            case 4: week="星期三"; break;            case 5: week="星期四"; break;            case 6: week="星期五"; break;            case 7: week="星期六"; break;        default:            break;        }        //Wed//      week = String.valueOf(Calendar.getInstance().getTime()).substring(0,3);        return week;    }    public void showNow(){        System.out.println( getDate()+getTime()+getWeekdays() );    }    //设置日历时间    public void setTime(){        Calendar c = Calendar.getInstance();//      c.setTimeInMillis(1478787010186L);        c.set(Calendar.YEAR, 2016);        c.set(Calendar.MONTH, 10);        c.set(Calendar.DAY_OF_MONTH, 10);        c.set(Calendar.HOUR, 10);        c.set(Calendar.MINUTE, 10);        c.set(Calendar.SECOND, 10);        //Date Thu Nov 10 22:10:10 CST 2016        System.out.println(c.getTime());        //long 1478787010186L        System.out.println(c.getTimeInMillis());    }}
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