在 Java 中使用 SimpleDateFormat('yyyy') 来显示年份


使用 SimpleDateFormat(“yyyy”) 显示年份 −

// displaying year
Format f = new SimpleDateFormat("yyyy");
String strYear = f.format(new Date());
System.out.println("Year = "+strYear);

由于我们已经使用了上面的 Format 和 SimpleDateFormat 类,因此需要导入以下程序包。除此之外,我们还使用了 Date −

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

以下是一个示例 −

示例

 实时演示

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("E, dd MMM yyyy HH:mm:ss Z");
      System.out.println("Today's date and time = "+simpleformat.format(cal.getTime()));
      // displaying date
      Format f = new SimpleDateFormat("dd/MMMM/yyyy");
      String strDate = f.format(new Date());
      System.out.println("Current Date = "+strDate);
      // displaying year
      f = new SimpleDateFormat("yyyy");
      String strYear = f.format(new Date());
      System.out.println("Year = "+strYear);
      // current time
      f = new SimpleDateFormat("HH.mm.ss Z");
      String strTime = f.format(new Date());
      System.out.println("Current Time = "+strTime);
      // 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 and time = Mon, 26 Nov 2018 09:19:54 +0000
Current Date = 26/November/2018
Year = 2018
Current Time = 09.19.54 +0000
Current Hour = 9
Current Minutes = 19
Current Seconds = 54

更新于:2019-07-30

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