import java.nio.file.FileStore;
import java.nio.file.FileSystems;
import java.nio.file.FileSystem;
import java.io.IOException;

public class GetFileStores {

    public static void main(String[] args) {
      FileSystem fileSystem = FileSystems.getDefault();
      Iterable<FileStore> stores = fileSystem.getFileStores();
      long gigabyte = 1_073_741_824L;
      for(FileStore store:stores){
        try {
        System.out.format("\nStore: %-20s %-5s      Capacity: %5dgb      Unallocated: %6dgb",
                                     store.name(),
                                     store.type(),
                                     store.getTotalSpace()/gigabyte,
                                     store.getUnallocatedSpace()/gigabyte);
        } catch(IOException e) {
          e.printStackTrace();
        }
      }
    }
}