Java LocalDateTime compareTo()用法及代码示例

Java中的LocalDateTime类的compareTo()方法用于将此日期时间与作为参数传递的日期时间进行比较。

用法:

public int compareTo(ChronoLocalDateTime anotherDate)

参数：此方法接受参数anotherDate，该参数指定要与之进行比较的另一个日期时间。它不能为空。

返回值：该函数返回一个整数值，它是比较后的比较器值。

以下示例程序旨在说明LocalDateTime.compareTo()方法：

示例1:

// Program to illustrate the compareTo() method 
  
import java.util.*; 
import java.time.*; 
  
public class GfG { 
    public static void main(String[] args) 
    { 
        // Parses the date 
        LocalDateTime dt1 
            = LocalDateTime 
                  .parse("2018-11-03T12:45:30"); 
  
        // Prints the date 
        System.out.println("Date 1: " + dt1); 
  
        // Parses the date 
        LocalDateTime dt2 
            = LocalDateTime 
                  .parse("2015-01-05T12:45:30"); 
  
        // Prints the date 
        System.out.println("Date 2: " + dt2); 
  
        // Compares the date 
        System.out.println("After comparison: "
                           + dt2.compareTo(dt1)); 
    } 
}

输出：

Date 1: 2018-11-03T12:45:30
Date 2: 2015-01-05T12:45:30
After comparison: -3

示例2:

// Program to illustrate the compareTo() method 
  
import java.util.*; 
import java.time.*; 
  
public class GfG { 
    public static void main(String[] args) 
    { 
        // Parses the date 
        LocalDateTime dt1 
            = LocalDateTime 
                  .parse("2010-12-05T12:50:30"); 
  
        // Prints the date 
        System.out.println("Date 1: " + dt1); 
  
        // Parses the date 
        LocalDateTime dt2 
            = LocalDateTime 
                  .parse("2012-05-10T12:50:30"); 
  
        // Prints the date 
        System.out.println("Date 2: " + dt2); 
  
        // Compares the date 
        System.out.println("After comparison: "
                           + dt2.compareTo(dt1)); 
    } 
}

输出：

Date 1: 2010-12-05T12:50:30
Date 2: 2012-05-10T12:50:30
After comparison: 2

参考： https://docs.oracle.com/javase/10/docs/api/java/time/LocalDateTime.html#compareTo(java.time.chrono.ChronoLocalDateTime)

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注：本文由纯净天空筛选整理自gopaldave大神的英文原创作品 LocalDateTime compareTo() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。