File body = new File();
        body.setTitle("ringeeapp");
        body.setDescription("file uploadings");
        body.setMimeType("text/plain");
        body.setParents(Arrays.asList(new ParentReference().setId(folderId)));
        java.io.File fileContent = new java.io.File("G:\document.txt");
        FileContent mediaContent = new FileContent("text/plain", fileContent);
        File file = service.files().insert(body,mediaContent).execute();
        System.out.print("file id is :" + file.getId());
        Permission newPermission = new Permission();
        // for showing files in browser that reason only using additional
        // permission
        newPermission.setValue("");
        newPermission.setType("anyone");
        newPermission.setRole("reader");
        service.permissions().insert(file.getId(), newPermission).execute();
        return file;