InventivetalentDev / Spiget-Update

SpigetUpdate updater = new SpigetUpdate(this, 12345);

// This compares versions just by checking if they are equal
// This means that older versions will also be treated as updates
updater.setVersionComparator(VersionComparator.EQUAL);

// This converts a semantic version to an integer and checks if the updated version is greater
updater.setVersionComparator(VersionComparator.SEM_VER);

updater.checkForUpdate(new UpdateCallback() {
	@Override
	public void updateAvailable(String newVersion, String downloadUrl, boolean hasDirectDownload) {
		//// A new version is available
		// newVersion - the latest version
		// downloadUrl - URL to the download
		// hasDirectDownload - whether the update is available for a direct download on spiget.org
	}

	@Override
	public void upToDate() {
		//// Plugin is up-to-date
	}
});

final SpigetUpdate updater = new SpigetUpdate(this, 12345);
updater.checkForUpdate(new UpdateCallback() {
	@Override
	public void updateAvailable(String newVersion, String downloadUrl, boolean hasDirectDownload) {
		// First check if there is a direct download available
		// (Either the resources is hosted on spigotmc.org, or Spiget has a cached version to download)
		// external downloads won't work if they are disabled (by default) in spiget.properties
		if (hasDirectDownload) {
			if (updater.downloadUpdate()) {
				// Update downloaded, will be loaded when the server restarts
			} else {
				// Update failed
				getLogger().warning("Update download failed, reason is " + updater.getFailReason());
			}
		}
	}

	@Override
	public void upToDate() {
	}
});