Java中的 ZoneOffsetTransition compareTo() 方法与示例

Java.time.zone.ZoneOffsetTransition类的compareTo()方法用于比较 ZoneOffsetTransition 类型的两个对象。比较是基于过渡时刻进行的。
句法：

public int compareTo(ZoneOffsetTransition transition)

参数：此方法采用 ZoneoffsetTransition 类型的过渡，并将其与此过渡进行比较。
返回值：如果 ZoneOffsetTransition 的两个对象相等，则此方法返回零，如果传递的转换小于此转换，则返回负值，如果传递的转换大于此转换，则返回正值。
以下是说明compareTo()方法的示例：
示例 1：

Java

// Java program to demonstrate
// compareTo() method
 
import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
import java.time.zone.*;
 
public class GFG {
    public static void main(String[] argv)
    {
 
        // Creating and initializing the
        // object of LocalDateTime
        LocalDateTime loc
            = LocalDateTime.of(
                1999, 04, 25, 03,
                24, 45, 0);
 
        // Creating and initializing the
        // object of ZoneOffset
        ZoneOffset off1
            = ZoneOffset.ofTotalSeconds(
                8);
 
        // Creating and initializing the
        // object of ZoneOffset
        ZoneOffset off2
            = ZoneOffset.ofTotalSeconds(
                12);
 
        // Creating and initializing
        // ZoneOffsetTransition Object
        ZoneOffsetTransition zonetrans1
            = ZoneOffsetTransition.of(
                loc, off1, off2);
 
        // Creating and initializing
        // ZoneOffsetTransition Object
        ZoneOffsetTransition zonetrans2
            = ZoneOffsetTransition.of(
                loc, off1, off2);
 
        // Comparing both object using
        // compareTo() method
        int status
            = zonetrans1.compareTo(
                zonetrans2);
 
        // Display the result
        if (status == 0)
            System.out.println(
                "zonetrans1 is equal to zonetrans2");
        else if (status > 0)
            System.out.println(
                "zonetrans1 is greater than zonetrans2");
        else
            System.out.println(
                "zonetrans1 is lesser than zonetrans2");
    }
}

输出：

zonetrans1 is equal to zonetrans2

示例 2：

Java

// Java program to demonstrate
// compareTo() method
 
import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
import java.time.zone.*;
 
public class GFG {
    public static void main(String[] argv)
    {
 
        // Creating and initializing the
        // object of LocalDateTime
        LocalDateTime loc
            = LocalDateTime.of(
                1999, 04, 25, 03,
                24, 45, 0);
 
        // Creating and initializing the
        // object of ZoneOffset
        ZoneOffset off1
            = ZoneOffset.ofTotalSeconds(
                8);
 
        // Creating and initializing the
        // object of ZoneOffset
        ZoneOffset off2
            = ZoneOffset.ofTotalSeconds(
                12);
 
        // Creating and initializing
        // ZoneOffsetTransition Object
        ZoneOffsetTransition zonetrans1
            = ZoneOffsetTransition.of(
                loc, off1, off2);
 
        // Creating and initializing
        // ZoneOffsetTransition Object
        ZoneOffsetTransition zonetrans2
            = ZoneOffsetTransition.of(
                loc, off2, off1);
 
        // Comparing both object using
        // compareTo() method
        int status
            = zonetrans1.compareTo(
                zonetrans2);
 
        // Display the result
        if (status == 0)
            System.out.println(
                "zonetrans1 is equal to zonetrans2");
        else if (status > 0)
            System.out.println(
                "zonetrans1 is greater than zonetrans2");
        else
            System.out.println(
                "zonetrans1 is lesser than zonetrans2");
    }
}

输出：

zonetrans1 is greater than zonetrans2

参考： https://docs.oracle.com/javase/9/docs/api/ Java/time/zone/ZoneOffsetTransition.html#compareTo-java.time.zone.ZoneOffsetTransition-