import java.io.File;
import java.net.URI;
import java.nio.file.StandardCopyOption;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;


public class TestNIO2
{
  public static void main( String args[] )
    throws Exception
  {
    if ( ( args == null ) || ( args.length != 1 ) )
    {
      System.err.println( "Must specify file to add to zip" );
      System.exit( 1 );
		}

    final File  file = new File( "MyTestZip.zip" );

    final Map<String,String>  env = new HashMap<>();
    if ( !file.isFile() )
      env.put( "create", "true" );

    final URI  fileUri = file.getAbsoluteFile().toURI();
    final URI  uri = URI.create( "jar:" + fileUri );

    try ( FileSystem zipfs = FileSystems.newFileSystem( uri, env ) )
    {
      Path externalFile = Paths.get( args[0] );
      Path pathInZipfile = zipfs.getPath( "/" + externalFile.getFileName() );
      Files.copy( externalFile, pathInZipfile, StandardCopyOption.REPLACE_EXISTING );
    }
  }
}