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Library for computing the sunrise/sunset from GPS coordinates and a date, in Java.
Java Ruby
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README.markdown

Sunrise/SunsetLib - Java

Description

Java library to compute the local sunrise and sunset at a given latitude/longitue and date combination. Uses the algorithm found at http://williams.best.vwh.net/sunrise_sunset_algorithm.htm.

Dependencies

None

Installation

Download the jar or clone the repo and run $ mvn clean install to build from source.

Maven

You can now use Maven to pull in SunriseSunsetLib into your project, just add:

<dependency>
  <groupId>com.luckycatlabs</groupId>
  <artifactId>SunriseSunsetCalculator</artifactId>
  <version>1.2</version>
</dependency>

to your pom.xml.

If you use gradle, add the following to your build.gradle file:

repositories {
    mavenCentral()
}

dependencies {
    compile 'com.luckycatlabs:SunriseSunsetCalculator:1.2'
}

Usage

Create a SunriseSunsetCalculator with a location and time zone identifier:

Location location = new Location("39.9522222", "-75.1641667");
SunriseSunsetCalculator calculator = new SunriseSunsetCalculator(location, "America/New_York");

Then call the method for the type of sunrise/sunset you want to calculate:

String officialSunrise = calculator.getOfficialSunriseForDate(Calendar.getInstance());
Calendar officialSunset = calculator.getOfficialSunsetCalendarForDate(Calendar.getInstance());

Bug Reports

When filing a bug report, please include the following information:

  • Date sunrise/set calculation was being run for.
  • Latitude/longitute sunrise/set calculation was being run for.
  • Timezone (either "America/New_York" or GMT-0500)

Author

Mike Reedell

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License

Apache License, Version 2.0 http://www.apache.org/licenses/LICENSE-2.0

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