java的equals方法

日期类equals()方法 (Date Class equals() method)

• equals() method is available in java.util package.

  equals()方法在java.util包中可用。

• equals() method is used to check whether this date and the given object (o) are equals or not.

  equals()方法用于检查此日期和给定对象(o)是否相等。

• equals() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  equals()方法是一种非静态方法，仅可通过类对象访问，如果尝试使用类名访问该方法，则会收到错误消息。

• equals() method does not throw an exception at the time checking equality of this date object with the given object (o).

  在检查此日期对象与给定对象(o)的相等性时， equals()方法不会引发异常。

Syntax:

句法：

public boolean equals(Object o);

Parameter(s):

参数：

• Object o – represents the object to be compared with this date.

  对象o –表示要与此日期进行比较的对象。

Return value:

返回值：

The return type of this method is boolean, it returns true when two date objects are equals otherwise it returns false.

此方法的返回类型为boolean ，当两个日期对象相等时返回true，否则返回false。

Example:

例：

// Java program to demonstrate the example // of boolean equals(Object o) method of Dateimport java.util.*;public class EqualsOfDate {
       public static void main(String[] args) {
           // create two Date object with two dates        Date this_date = new Date(2016, 8, 20);        Date given_date = new Date(2010, 11, 30);        // By using equals() method is to check         // equality of this_date and the given_date        boolean status = this_date.equals(given_date);        // Display status        System.out.println("this_date.equals(given_date): " + status);    }}

Output

输出量

this_date.equals(given_date): false

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java的equals方法