Java 日历 setTimeZone()方法及示例

Calendar类中的 setTimeZone(TimeZone time_zone) 方法接受一个时区值作为参数，并修改或设置该日历所代表的时区。

语法

public void setTimeZone(TimeZone time_zone)

参数： 该方法需要一个日期类型的参数 time_zone ，指的是要设置的给定日期。

返回值： 该方法不返回任何值。

下面的程序说明了日历类的setTimeZone()方法的工作原理：

例1 :

// Java code to illustrate
// setTime() method
  
import java.util.*;
  
public class Calendar_Demo {
    public static void main(String[] args)
    {
  
        // Creating calendar object
        Calendar calndr = Calendar.getInstance();
  
        // Displaying the current time zone
        String tz_name = calndr.getTimeZone()
                             .getDisplayName();
  
        System.out.println("The Current Time"
                           + " Zone: " + tz_name);
  
        TimeZone time_zone
            = TimeZone.getTimeZone("GMT");
  
        // Modifying the time zone
        calndr.setTimeZone(time_zone);
  
        // Displaying the modified zone
        System.out.println("Modified Zone: "
                           + calndr.getTimeZone()
                                 .getDisplayName());
    }
}

输出:

The Current Time Zone: Coordinated Universal Time
Modified Zone: Greenwich Mean Time

例2 :

// Java code to illustrate
// setTimeZone() method
  
import java.util.*;
  
public class Calendar_Demo {
    public static void main(String[] args)
    {
  
        // Creating calendar object
        Calendar calndr = Calendar.getInstance();
  
        // Displaying the current time zone
        String tz_name = calndr.getTimeZone()
                             .getDisplayName();
  
        System.out.println("The Current Time"
                           + " Zone: " + tz_name);
  
        TimeZone time_zone
            = TimeZone.getTimeZone("Pacific/Tahiti");
  
        // Modifying the time zone
        calndr.setTimeZone(time_zone);
  
        // Displaying the modified zone
        System.out.println("Modified Zone: "
                           + calndr.getTimeZone()
                                 .getDisplayName());
    }
}

输出:

The Current Time Zone: Coordinated Universal Time
Modified Zone: Tahiti Time

**参考资料: **https://docs.oracle.com/javase/7/docs/api/java/util/Calendar.html#setTimeZone(java.util.TimeZone)