Java OffsetDateTime compareTo()方法及示例

Java中OffsetDateTime类的 compareTo() 方法将这个日期时间与另一个日期时间进行比较。
语法

public int compareTo(OffsetDateTime other)

参数： 该方法接受一个单一的参数 other ，指定与之比较的另一个日期时间，而不是null。
返回值： 它返回比较器的值，如果小于，则为负，如果大于，则为正。
以下程序说明了compareTo方法：
程序1 :

// Java program to demonstrate the compareTo() method
 
import java.time.OffsetDateTime;
import java.time.ZonedDateTime;
 
public class GFG {
    public static void main(String[] args)
    {
 
        // Parses the date1
        OffsetDateTime date1 = OffsetDateTime.parse("2018-12-12T13:30:30+05:00");
 
        // Parses the date2
        OffsetDateTime date2 = OffsetDateTime.parse("2018-12-12T13:30:30+05:00");
 
        // Prints both dates
        System.out.println("Date1: " + date1);
        System.out.println("Date2: " + date2);
 
        // Compare both
        System.out.println("On comparing we get " + date1.compareTo(date2));
    }
}

输出

Date1: 2018-12-12T13:30:30+05:00
Date2: 2018-12-12T13:30:30+05:00
On comparing we get 0

程序2 :

// Java program to demonstrate the compareTo() method
import java.time.OffsetDateTime;
import java.time.ZonedDateTime;
 
public class GFG {
    public static void main(String[] args)
    {
 
        // Parses the date1
        OffsetDateTime date1 = OffsetDateTime.parse("2018-12-12T13:30:30+05:00");
 
        // Parses the date2
        OffsetDateTime date2 = OffsetDateTime.parse("2015-12-12T13:30:30+05:00");
 
        // Prints both dates
        System.out.println("Date1: " + date1);
        System.out.println("Date2: " + date2);
 
        // Compare both
        System.out.println("On comparing we get " + date1.compareTo(date2));
    }
}

输出

Date1: 2018-12-12T13:30:30+05:00
Date2: 2015-12-12T13:30:30+05:00
On comparing we get 3

程序3 :

// Java program to demonstrate the compareTo() method
import java.time.OffsetDateTime;
import java.time.ZonedDateTime;
 
public class GFG {
    public static void main(String[] args)
    {
 
        // Parses the date1
        OffsetDateTime date1 = OffsetDateTime.parse("2013-12-12T13:30:30+05:00");
 
        // Parses the date2
        OffsetDateTime date2 = OffsetDateTime.parse("2015-12-12T13:30:30+05:00");
 
        // Prints both dates
        System.out.println("Date1: " + date1);
        System.out.println("Date2: " + date2);
 
        // Compare both
        System.out.println("On comparing we get " + date1.compareTo(date2));
    }
}

输出

Date1: 2013-12-12T13:30:30+05:00
Date2: 2015-12-12T13:30:30+05:00
On comparing we get -2

参考资料 : https://docs.oracle.com/javase/8/docs/api/java/time/temporal/TemporalAdjuster.html