使用 Java 中的 SimpleDateFormat('d') 显示日期数字
java 8object oriented programmingprogramming
要显示日期数字，请使用 SimpleDateFormat('d')，如下所示 −
Format f = new SimpleDateFormat("d");
String strDay = f.format(new Date());
System.out.println("Day Number = "+strDay);
由于我们在上面使用了 Format 和 SimpleDateFormat 类，因此导入以下包。同时，我们还使用了 Date −
import java.text.Format; import java.text.SimpleDateFormat; import java.util.Date;
下面是一个例子 −
示例
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Calendar;
public class Demo {
public static void main(String[] args) throws Exception {
// displaying current date and time
Calendar cal = Calendar.getInstance();
SimpleDateFormat simpleformat = new SimpleDateFormat("dd/MMMM/yyyy hh:mm:s");
System.out.println("Today's date = "+simpleformat.format(cal.getTime()));
// current time
Format f = new SimpleDateFormat("HH.mm.ss Z");
String strResult = f.format(new Date());
System.out.println("Time = "+strResult);
// displaying day number
f = new SimpleDateFormat("d");
String strDay = f.format(new Date());
System.out.println("Day Number = "+strDay);
// displaying hour
f = new SimpleDateFormat("H");
String strHour = f.format(new Date());
System.out.println("Current Hour = "+strHour);
// displaying minutes
f = new SimpleDateFormat("mm");
String strMinute = f.format(new Date());
System.out.println("Current Minutes = "+strMinute);
// displaying seconds
f = new SimpleDateFormat("ss");
String strSeconds = f.format(new Date());
System.out.println("Current Seconds = "+strSeconds);
}
}
输出
Today's date = 26/November/2018 08:57:31 Time = 08.57.31 +0000 Day Number = 26 Current Hour = 8 Current Minutes = 57 Current Seconds = 31
