java.util.Calendar.after()方法
java.util.Calendar.after()是 java.util 包的 Calendar 类中的一个方法。如果此日历表示的时间在对象出现时表示的时间之后，则该方法返回真。如果不是，则返回假。
语法:
public boolean after(Object when)
Where, when is the Object
that is to be compared.
下面是一些例子，可以更好地理解 Calendar.after()函数的实现:
例 1 :
// Java code show the usage of
// after() method of Calendar class
import java.util.*;
class GFG {
// Driver code
public static void main(String[] args)
throws InterruptedException {
// creating calendar object
Calendar cal_obj1 = Calendar.getInstance();
// printing current date
System.out.println("Time 1 : " + cal_obj1.getTime());
// creating Calendar object
Calendar cal_obj2 = Calendar.getInstance();
// printing current date
System.out.println("Time 2 : " + cal_obj2.getTime());
// checking if 1st date is after 2nd date
// and printing the result
System.out.println(cal_obj1.after(cal_obj2));
}
}
输出:
Time 1 : Thu Mar 01 09:26:04 UTC 2018
Time 2 : Thu Mar 01 09:26:04 UTC 2018
false
例 2 :
// Java code to show the usage of
// after() method of Calendar class
import java.util.*;
class GFG {
// Driver code
public static void main(String[] args)
{
// creating calendar objects
Calendar cal_obj1 = Calendar.getInstance();
Calendar cal_obj2 = Calendar.getInstance();
// displaying the current date
System.out.println("Current date is : " + cal_obj1.getTime());
// changing year in cal_obj2 calendar
cal_obj2.set(Calendar.YEAR, 2010);
// check if calendar date is after current date
System.out.println("Result : " + cal_obj1.after(cal_obj2));
}
}
输出:
Current date is : Thu Mar 01 09:27:19 UTC 2018
Result : true
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