Java 日历 equals()方法

java.util.Calendar.equals()是java.util包中 Calendar 类的一个方法。该方法将这个Calendar与指定的Object进行比较。如果这个对象与Object相等，该方法返回true。如果不是这样，也就是说，如果两个Calendars之间的参数有任何不同，那么就会返回false。

语法:

public boolean equals(Object object)

其中，object是对象要与之比较。

下面是一些例子，以更好地理解Calendar.equals()函数的实现。

例子 1 :

// Java code to show the use of// equals() method of Calendar classimport java.util.*;  class GFG {  // Driver codepublic static void main(String[] args)             throws InterruptedException {                      // creating calendar object    Calendar cal_obj1 = Calendar.getInstance();    Calendar cal_obj2 = cal_obj1;                      // printing current date    System.out.println("Time 1 : " + cal_obj1.getTime());                      // printing current date    System.out.println("Time 2 : " + cal_obj2.getTime());          // checking if 1st date is equal to 2nd date    // and printing the result    System.out.println(cal_obj1.equals(cal_obj2));    }}

输出:

Time 1 : Thu Mar 01 09:36:17 UTC 2018Time 2 : Thu Mar 01 09:36:17 UTC 2018true

例2：

// Java code to show the use of// equals() method of Calendar classimport 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);          // displaying the year    System.out.println("Year is " +                         cal_obj2.get(Calendar.YEAR));      // check if calendar date is equal to current date    System.out.println("Result : " +                         cal_obj1.equals(cal_obj2));    }}

输出:

Current date is : Thu Mar 01 09:39:30 UTC 2018Year is 2010Result : false