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

程序2 :

// Java program to demonstrate the compareTo() methodimport 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+05:00Date2: 2015-12-12T13:30:30+05:00On comparing we get 3

程序3 :

// Java program to demonstrate the compareTo() methodimport 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+05:00Date2: 2015-12-12T13:30:30+05:00On comparing we get -2

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