Java NIO Filesystems

import java.io.IOException;
import java.net.URI;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.util.HashMap;
import java.util.Map;


public class FileSystemsExample {

    public static void main(String ... strings){
        FileSystem fs = FileSystems.getDefault();
        System.out.println(fs.provider().getScheme());

        Map<String, String> env = new HashMap<>();
        env.put("capacity", "10G");
        env.put("blockSize", "4k");

        try {
            FileSystem fs1 = FileSystems.newFileSystem(URI.create("memory:///?name=logfs"), env);
            System.out.println(fs.toString());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}