Java Convert LocalTime to OffsetTime

Tags: Java LocalTime Java OffsetTime Java 8

In this Java core tutorial we learn how to convert a java.time.LocalTime object to an java.time.OffsetTime object in Java programming language.

How to convert LocalTime to OffsetTime in Java

To convert a LocalTime object to OffsetTime object we can combine the LocalTime with a time offset represent by ZoneOffset class. For example, in the following Java program we combine a LocalTime with a time offset from system time zone to create a new OffsetTime object.

ConvertLocalTimeToOffsetTimeExample1.java 

import java.time.Instant;
import java.time.LocalTime;
import java.time.OffsetTime;
import java.time.ZoneId;
import java.time.ZoneOffset;

public class ConvertLocalTimeToOffsetTimeExample1 {
    public static void main(String... args) {
        LocalTime localTime = LocalTime.of(20, 30, 50);
        ZoneOffset zoneOffset = ZoneId.systemDefault().getRules().getOffset(Instant.now());
        OffsetTime offsetTime = localTime.atOffset(zoneOffset);

        System.out.println("LocalTime: " + localTime);
        System.out.println("ZoneOffset: " + zoneOffset);
        System.out.println("OffsetTime: " + offsetTime);
    }
}
The output as below. 
LocalTime: 20:30:50
ZoneOffset: +07:00
OffsetTime: 20:30:50+07:00

In the following Java program we show how to combine LocalTime with UTC time offset to create OffsetTime in UTC time zone.

ConvertLocalTimeToOffsetTimeExample2.java 

import java.time.LocalTime;
import java.time.OffsetTime;
import java.time.ZoneOffset;

public class ConvertLocalTimeToOffsetTimeExample2 {
    public static void main(String... args) {
        LocalTime localTime = LocalTime.of(20, 30, 50);
        ZoneOffset zoneOffset = ZoneOffset.UTC;
        OffsetTime offsetTime = localTime.atOffset(zoneOffset);

        System.out.println("LocalTime: " + localTime);
        System.out.println("ZoneOffset: " + zoneOffset);
        System.out.println("OffsetTime: " + offsetTime);
    }
}
The output as below. 
LocalTime: 20:30:50
ZoneOffset: Z
OffsetTime: 20:30:50Z

Happy Coding 😊

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