Java 日历 set()方法及实例

Calendar类中的 set(int calndr_field , int new_val) 方法用于将calndr_field的值设置为new_val。这个日历的旧字段会被新字段所取代。

语法

public void set(int calndr_field, int new_val)

参数： 该方法需要两个参数。

• calndr_field : 这是日历类型的，指的是要改变的日历字段。
• new_val : 这指的是要被替换的新值。

返回值： 该方法不返回任何值。

下面的程序说明了日历类的set()方法的工作原理：

示例1 :

// Java code to illustrate
// set() method
  
import java.util.*;
public class Calendar_Demo {
    public static void main(String args[])
    {
  
        // Creating a calendar
        Calendar calndr = Calendar.getInstance();
  
        // Displaying the month
        System.out.println("The Current Month is: "
                           + calndr.get(
                                 Calendar.MONTH));
  
        // Replacing with a new value
        calndr.set(Calendar.MONTH, 11);
  
        // Displaying the modified result
        System.out.println("Altered Month is: "
                           + calndr.get(
                                 Calendar.MONTH));
    }
}

输出:

The Current Month is: 1
Altered Month is: 11

例2 :

// Java code to illustrate
// set() method
  
import java.util.*;
public class Calendar_Demo {
    public static void main(String args[])
    {
  
        // Creating a calendar
        Calendar calndr = Calendar.getInstance();
  
        // Displaying the Year
        System.out.println("The Current year is: "
                           + calndr.get(
                                 Calendar.YEAR));
  
        // Replacing with a new value
        calndr.set(Calendar.YEAR, 1996);
  
        // Displaying the modified result
        System.out.println("Altered year is: "
                           + calndr.get(
                                 Calendar.YEAR));
    }
}

输出:

The Current year is: 2019
Altered year is: 1996

参考资料: https://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#set-int-int-