java.util.Calendar after()方法

java.util.Calendar.after(Object when) 如果此Calendar表示的时间晚于when对象表示的时间，则此方法返回true 。如果不是这种情况，则返回false。

1 语法

public boolean after(Object when)  

2 参数

when：将要比较的时间对象。

3 返回值

如果此日历表示的时间晚于when对象表示的时间，则为true；否则为true。否则为false。

4 示例1 

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 * java.util.Calendar after()方法的例子
 */
import java.util.*;  
public class CalendarafterExample1{  
   public static void main(String[] args) {     
      // create calendar objects.  
       Calendar cal = (Calendar) Calendar.getInstance();  
      Calendar future = (Calendar) Calendar.getInstance();  
      // print the current date  
      System.out.println("Current date: " + cal.getTime());  
      // change year in future calendar  
      future.set(Calendar.YEAR, 2015);  
      System.out.println("Year is " + future.get(Calendar.YEAR));  
      // check if calendar date is after current date  
      Date time = future.getTime();        
      if (!future.after(cal)) {  
         System.out.println("Date " + time + " is before current date.");  
      }  
   }  
}  

输出结果为：

Current date: Sun Jul 29 07:50:47 PDT 2018
Year is 2015
Date Wed Jul 29 07:50:47 PDT 2015 is before current date.

5 示例2

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 * java.util.Calendar after()方法的例子
 */
import java.util.Calendar;  
import java.util.Date;  
public class  CalendarafterExample2 {     
public static void main(String[] args) {     
      // create calendar objects.  
       Calendar cal = (Calendar) Calendar.getInstance();  
      Calendar cal2 = (Calendar) Calendar.getInstance();  
      // print the current date  
      System.out.println("Current date: " + cal.getTime());  
      // change year in future calendar  
      cal2.set(Calendar.MONTH, 10);  
      System.out.println("Year is " + cal2.get(Calendar.MONTH));  
      // check if calendar date is after current date  
      Date time = cal2.getTime();       
      if (cal2.after(cal)) {  
         System.out.println("Date " + time + " is after current date.");  
      }  
   }  
} 

输出结果为：

Current date: Sun Jul 29 07:52:17 PDT 2018
Year is 10
Date Thu Nov 29 07:52:17 PST 2018 is after current date.

6 示例3

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 * java.util.Calendar after()方法的例子
 */
import java.util.Calendar;  
import java.util.Date;  
public class CalendarafterExample3 {      
public static void main(String[] args) {    
      // create calendar objects.  
       Calendar cal = (Calendar) Calendar.getInstance();  
      Calendar cal3 = (Calendar) Calendar.getInstance();  
      // print the current date  
      System.out.println("Current date: " + cal.getTime());  
      // change year in future calendar  
      cal3.set(Calendar.DAY_OF_MONTH, 30);  
      System.out.println("Year is " + cal3.get(Calendar.DAY_OF_MONTH));  
      // check if calendar date is after current date  
      Date time = cal3.getTime();       
      if (cal3.after(cal)) {  
         System.out.println("Date " + time + " is after current date.");  
      }  
   }  
}  

输出结果为：

Current date: Sun Jul 29 07:53:23 PDT 2018
Year is 30
Date Mon Jul 30 07:53:23 PDT 2018 is after current date.

7 示例4

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 * java.util.Calendar after()方法的例子
 */
import java.util.Calendar;  
import java.util.Date;  
public class CalendarafterExample4 {      
public static void main(String[] args) {     
      // create calendar objects.  
      Calendar cal = (Calendar) Calendar.getInstance();  
      Calendar cal3 = (Calendar) Calendar.getInstance();  
      // print the current date  
      System.out.println("Current date: " + cal.getTime());  
      // change year in future calendar  
      cal3.set(Calendar.HOUR, 30);  
      System.out.println("Now date is  " + cal3.getTime());  
       cal3.set(Calendar.MINUTE, 60);  
      System.out.println("Now date is  " + cal3.getTime());       
       cal3.set(Calendar.SECOND, 30);  
      System.out.println("Now date is  " + cal3.getTime());      
      // check if calendar date is after current date  
      Date time = cal3.getTime();        
      if (cal3.after(cal)) {  
         System.out.println("Date " + time + " is after current date.");  
      }  
   }  
}  

输出结果为：

Output
Current date: Sun Jul 29 07:54:14 PDT 2018
Now date is  Mon Jul 30 06:54:14 PDT 2018
Now date is  Mon Jul 30 07:00:14 PDT 2018
Now date is  Mon Jul 30 07:00:30 PDT 2018
Date Mon Jul 30 07:00:30 PDT 2018 is after current date.