[ JAVA ] Google Oauth2 - java.lang.NoClassDefFoundError

pom.xml

When occurs this error below, use the next steps:

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/appengine/api/urlfetch/HTTPMethod
at com.google.api.client.extensions.appengine.http.UrlFetchTransport.buildRequest(UrlFetchTransport.java:125)

You need to replace this dependency:

    <dependency>
      <groupId>com.google.api-client</groupId>
      <artifactId>google-api-client-servlet</artifactId>
      <version>1.20</version>
    </dependency>
    
For that:

    <dependency>
      <groupId>com.google.api-client</groupId>
      <artifactId>google-api-client-appengine</artifactId>
      <version>1.20</version>
    </dependency>