Java 中的 SimpleDateFormat 等于()方法，示例
原文:https://www . geesforgeks . org/simpledateform-equals-method-in-Java-with-examples/
简单日期格式类的等于()方法用于比较两个简单日期格式对象。如果此简单日期格式等于传递的对象，则方法返回真，否则返回假。
语法:
public boolean equals(Object *obj*)
参数:该方法采用对象类型的一个参数对象，并引用要与该简单日期格式对象进行比较的对象。
返回值:如果两个对象相等，则该方法返回布尔真，否则该方法返回假。
以下程序说明了简单日期格式的 equals()方法的工作: 示例 1:
// Java code to illustrate equals() method
import java.text.*;
import java.util.*;
public class SimpleDateFormat_Demo {
public static void main(String[] args)
throws InterruptedException, ParseException
{
// Initializing the first formatter
SimpleDateFormat SDFormat1
= new SimpleDateFormat();
// Initializing the second formatter
SimpleDateFormat SDFormat2
= new SimpleDateFormat();
// Displaying both the Formats
Date date = new Date();
String str_Date1
= SDFormat1.format(date);
System.out.println("First: "
+ (str_Date1));
String str_Date2
= SDFormat2.format(date);
System.out.println("Second: "
+ (str_Date2));
// Comparing both the objects
System.out.println("Equality: "
+ SDFormat1.equals(SDFormat2));
}
}
Output:
First: 1/30/19 9:59 AM
Second: 1/30/19 9:59 AM
Equality: true
例 2:
// Java code to illustrate equals() method
import java.text.*;
import java.util.*;
public class SimpleDateFormat_Demo {
public static void main(String[] args)
throws InterruptedException, ParseException
{
// Initializing the first formatter
SimpleDateFormat SDFormat1
= new SimpleDateFormat();
// Defining the SDFormat
SDFormat1.applyPattern("MMM");
// Initializing the second formatter
SimpleDateFormat SDFormat2
= new SimpleDateFormat();
// Displaying both the Formats
Date date = new Date();
String str_Date1
= SDFormat1.format(date);
System.out.println("First:
+ (str_Date1));
String str_Date2
= SDFormat2.format(date);
System.out.println("Second: "
+ (str_Date2));
// Comparing both the objects
System.out.println("Equality: "
+ SDFormat1.equals(SDFormat2));
}
}
Output:
First: Jan
Second: 1/30/19 10:00 AM
Equality: false
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