Java Calendar compareTo()方法
Calendar类的compareTo()方法比较两个日历对象之间的时间值(毫秒偏移量)。
语法
public int compareTo(Calendar anotherCalendar)
参数
anotherCalendar-要比较的Calendar对象。
返回
返回0，1或-1的整数值
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:
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:
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:
