Java Calendar compareTo() 方法

2024年11月3日 | 阅读 2 分钟

Calendar 类的 compareTo() 方法用于比较两个 Calendar 对象之间的时间值（以毫秒为单位）。

语法

参数

anotherCalendar - 要比较的 Calendar 对象。

返回值

返回一个整数值，可以是 0、1 或 -1

抛出

NullPointerException - 如果指定的 Calendar 为 null。

IllegalArgumentException - 如果无法获取指定 Calendar 对象的时间值

示例 1

import java.util.Calendar;
public class CalendarComparetoExample1 {    
public static void main(String[] args) {
      // create two calendar at the different dates
        Calendar cal1 =  (Calendar) Calendar.getInstance();
      Calendar cal2 = (Calendar) Calendar.getInstance();;
      // compare the time values represented by two calendar objects.
       cal2.add(Calendar.HOUR, 10);
       cal2.add(Calendar.MINUTE, 10);
       cal2.add(Calendar.SECOND, 10);
      int i = cal2.compareTo(cal1);
       // It should return a positive integer(usually 1),
      //if the current triggering object is greater than the passed one
      System.out.println("The result is :"+i);      
   }
}

输出

The result is :1

示例 2

import java.util.Calendar;
public class CalendarComparetoExample2 {
    public static void main(String[] args) {
      // create two calendar at the different dates
       Calendar cal1 =  (Calendar) Calendar.getInstance();
      Calendar cal2 = (Calendar) Calendar.getInstance();;
      // compare the time values represented by two calendar objects.
       cal2.add(Calendar.HOUR, 10);
       cal2.add(Calendar.MINUTE, 10);
       cal2.add(Calendar.SECOND, 10);
       int z = cal1.compareTo(cal2);
      // It should return a negative integer( -1),
      //if the current triggering object is less than the passed one
      System.out.println("The result is :" + z);
   }
}

输出

The result is :-1

示例 3

import java.util.Calendar;
public class CalendarComparetoExample3 {   
public static void main(String[] args) {
      // create two calendar at the different dates
       Calendar cal1 =  (Calendar) Calendar.getInstance();
     Calendar cal2 = (Calendar) Calendar.getInstance();;
      // compare the time values represented by two calendar objects.
       cal2.add(Calendar.HOUR, 10);
       cal2.add(Calendar.MINUTE, 10);
       cal2.add(Calendar.SECOND, 10);
      // compare again but with the two calendars swapped
      int j = cal1.compareTo(cal1);
      // It should return 0 ,
      //if the current triggering object is less equal to the  passed one
      System.out.println("The result is :" + j);
      }
}

输出

The result is :0

下一主题Java-calendar-complete-method

Java Calendar compareTo() 方法

语法

参数

返回值

抛出

示例 1

示例 2

示例 3

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Java Calendar compareTo() 方法

语法

参数

返回值

抛出

示例 1

示例 2

示例 3

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