Java中的 SimpleDateFormat setDateFormatSymbols() 方法及示例

SimpleDateFormat 类的setDateFormatSymbols()方法用于设置该日期格式的日期时间格式符号。

句法：

public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols)

参数：该方法采用一个参数newFormatSymbols ，它指的是要设置此日期格式的新格式符号。

返回值：该方法返回void类型。

下面的程序说明了 SimpleDateFormat 的 setDateFormatSymbols() 方法的工作：
示例 1：

// Java code to illustrate
// DateFormatSymbols() method
  
import java.text.*;
import java.util.*;
  
public class SimpleDateFormat_Demo {
    public static void main(String[] args)
        throws InterruptedException, ParseException
    {
        // Initializing SimpleDateFormat
        SimpleDateFormat SDFormat
            = new SimpleDateFormat();
  
        // Setting the DateFormatSymbols
        DateFormatSymbols DFSymbols
            = new DateFormatSymbols(
                new Locale("en",
                           "US"));
  
        // Illustrating the set method
        SDFormat.setDateFormatSymbols(DFSymbols);
  
        // Displaying the formats
        Date date = new Date();
        String str_Date1 = SDFormat.format(date);
        System.out.println("The SimpleDateFormat: "
                           + (str_Date1));
  
        // Working of DFS
        String[] the_days
            = DFSymbols.getShortWeekdays();
        int i, j = 1;
        for (i = 1; i < the_days.length; i++) {
            System.out.print("Day" + j++ + " : "
                             + the_days[i] + "\n");
        }
    }
}

输出：

The SimpleDateFormat: 1/30/19 10:27 AM
Day1 : Sun
Day2 : Mon
Day3 : Tue
Day4 : Wed
Day5 : Thu
Day6 : Fri
Day7 : Sat

示例 2：

// Java code to illustrate
// DateFormatSymbols() method
  
import java.text.*;
import java.util.*;
  
public class SimpleDateFormat_Demo {
    public static void main(String[] args)
        throws InterruptedException, ParseException
    {
        // Initializing SimpleDateFormat
        SimpleDateFormat SDFormat
            = new SimpleDateFormat();
  
        // Setting the DateFormatSymbols
        DateFormatSymbols DFSymbols
            = new DateFormatSymbols(
                new Locale("es",
                           "XL"));
  
        // Illustrating the set method
        SDFormat.setDateFormatSymbols(DFSymbols);
  
        // Displaying the formats
        Date date = new Date();
        String str_Date1 = SDFormat.format(date);
        System.out.println("The SimpleDateFormat: "
                           + (str_Date1));
  
        // Working of DFS
        String[] the_days
            = DFSymbols.getShortWeekdays();
        int i, j = 1;
        for (i = 1; i < the_days.length; i++) {
            System.out.print("Day" + j++ + " : "
                             + the_days[i] + "\n");
        }
    }
}

输出：

The SimpleDateFormat: 1/30/19 10:28 AM
Day1 : dom
Day2 : lun
Day3 : mar
Day4 : mi?
Day5 : jue
Day6 : vie
Day7 : s?b