import java.io.IOException;
import java.nio.channels.FileChannel;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;

public class ChannelForceTest {

    public static void main(String args[]) {
        if (args.length != 1) {
            System.out.println("Run with arg[0] being an absolute path to a webdav-mounted directory");
            System.exit(1);
        }

        String javaVersion = System.getProperty("java.version");
        String osName = System.getProperty("os.name");
        String osVersion = System.getProperty("os.version");
        Path p = Paths.get(args[0]);
        try (FileChannel ch = FileChannel.open(p, StandardOpenOption.WRITE,
            StandardOpenOption.CREATE)) {
            ch.force(true); // fails
            //System.out.println("No exception under JDK 8");
            System.out.format("No exception under JDK %s on %s %s%n",
                javaVersion, osName, osVersion);
        } catch (IOException e) {
            //System.out.println("Exception under JDK 9+");
            System.out.format("Exception under JDK %s on %s %s%n",
                javaVersion, osName, osVersion);
            e.printStackTrace();
        }
    }

}