Download file using Google drive api v3 in java

Question

I try to use google drive api v3 to download file in java with this code i get it from github from this link this link of java file in github

package drive.sample;


import ...

public class MainActivity extends AppCompatActivity {

    
    private static ByteArrayOutputStream downloadFile(String realFileId) throws IOException{
        /* Load pre-authorized user credentials from the environment.
        TODO(developer) - See https://developers.google.com/identity for
        guides on implementing OAuth2 for your application.*/
        GoogleCredentials credentials = GoogleCredentials.getApplicationDefault().createScoped(Arrays.asList(DriveScopes.DRIVE_FILE));
        HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
        credentials);
        
        // Build a new authorized API client service.
        Drive service = new Drive.Builder(new NetHttpTransport(),
        GsonFactory.getDefaultInstance(),
        requestInitializer)
        .setApplicationName("Drive samples")
        .build();
        
        try {
            OutputStream outputStream = new ByteArrayOutputStream();
            
            service.files().get(realFileId)
            .executeMediaAndDownloadTo(outputStream);
            
            return (ByteArrayOutputStream) outputStream;
            }catch (GoogleJsonResponseException e) {
            // TODO(developer) - handle error appropriately
            System.err.println("Unable to move file: " + e.getDetails());
            throw e;
        }
    }
}
// [END drive_download_file]

But when run app it show me this error

Error : type of HttpCredentialsAdapter (com. google . auth.Credentials) is erroneous

How i can solve this problem ?