Java 中的 ChronoZonedDateTime compareTo()方法,带示例

原文:https://www . geeksforgeeks . org/chronozoneddatetime-compare to-method-in-Java-with-examples/

Java 方法中时区数据时间接口的 compareTo() 方法将此日期与另一个日期进行比较。

语法 :

default int compareTo(ChronoZonedDateTime other)

参数:该方法接受一个参数其他,该参数指定要比较的其他日期,并且不是特别空。

返回值:它返回比较器值,比较器值小则为负,大则为正。

下面的程序说明了 Java 中的 ChronoZonedDateTime 的 compareTo()方法:

节目 1 :

// Program to illustrate the compareTo() method

import java.util.*;
import java.time.*;
import java.time.chrono.*;

public class GfG {
    public static void main(String[] args)
    {
        // First date
        ChronoZonedDateTime dt
            = ZonedDateTime.parse(
                "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]");

        System.out.println(dt);

        // Second date
        ChronoZonedDateTime dt1
            = ZonedDateTime.parse(
                "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]");

        System.out.println(dt1);

        try {
            // Compare both dates
            System.out.println(dt1.compareTo(dt));
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出:

2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
0

节目 2 :

// Program to illustrate the compareTo() method

import java.util.*;
import java.time.*;
import java.time.chrono.*;

public class GfG {
    public static void main(String[] args)
    {
        // First date
        ChronoZonedDateTime dt
            = ZonedDateTime.parse(
                "2018-10-25T23:12:31.123+02:00[Europe/Paris]");

        System.out.println(dt);

        // Second date
        ChronoZonedDateTime dt1
            = ZonedDateTime.parse(
                "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]");

        System.out.println(dt1);

        try {
            // Compare both dates
            System.out.println(dt1.compareTo(dt));
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出:

2018-10-25T23:12:31.123+02:00[Europe/Paris]
2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
1

参考:https://docs . Oracle . com/javae/9/docs/API/Java/time/chrono/chronitoredatetime . html # share-Java . time . chrono . chronitoredatetime-