java的equals方法_Java Date equals（）方法与示例

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 Date
import 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