我按照https://github.com/louismullie/stanford-core-nlp给出的所有说明进行操作，然后按照随附文章中的建议安装了 JRE 1.6。
但现在我收到一个错误，上面写着
java.lang.NullPointerException
我是 Ruby 的新手，并且在所有地方都尝试过了解正在发生的事情。
actionpack (3.2.1) lib/action_controller/metal/rescue.rb:32:in rescue in process_action'
actionpack (3.2.1) lib/action_controller/metal/rescue.rb:29:inprocess_action' actionpack (3.2.1) lib/action_controller/metal/instrumentation.rb:30:in block in process_action'
activesupport (3.2.1) lib/active_support/notifications.rb:123:inblock in instrument' activesupport (3.2.1) lib/active_support/notifications/instrumenter.rb:20:ininstrument'
activesupport (3.2.1) lib/active_support/notifications.rb:123:in仪器'动作包 (3.2.1) lib/action_controller/metal/instrumentation.rb:29:in process_action'
actionpack (3.2.1) lib/action_controller/metal/params_wrapper.rb:205:inprocess_action' activerecord (3.2.1) lib/active_record/railties/controller_runtime。 rb:18:in process_action'
actionpack (3.2.1) lib/abstract_controller/base.rb:121:inprocess' actionpack (3.2.1) lib/abstract_controller/rendering.rb:45:in process'
actionpack (3.2.1) lib/action_controller/metal.rb:203:indispatch' actionpack (3.2.1) lib/action_controller/metal/rack_delegation.rb:14:in dispatch'
actionpack (3.2.1) lib/action_controller/metal.rb:246:inblock in action' actionpack (3.2.1) lib/action_dispatch/routing/route_set.rb:66:in call'
actionpack (3.2.1) lib/action_dispatch/routing/route_set.rb:66:indispatch' actionpack (3.2.1) lib/action_dispatch/routing/route_set.rb:30：在call'
journey (1.0.4) lib/journey/router.rb:68:in阻塞呼叫'旅程（1.0.4）lib/journey/router.rb:56:in call'actionpack each'
journey (1.0.4) lib/journey/router.rb:56:in（3.2.1）lib/action_dispatch/routing/route_set.rb:589:in call'
omniauth (1.1.1) lib/omniauth/strategy.rb:177:incall！' omniauth (1.1.1) lib/omniauth/strategy.rb:157:in call'
omniauth (1.1.1) lib/omniauth/builder.rb:48:incall' actionpack (3.2.1) lib/action_dispatch/middleware/best_standards_support.rb:17:in call'
rack (1.4.1) lib/rack/etag.rb:23:incall' rack (1.4.1) lib/rack/ conditionalget.rb:25:in call'
actionpack (3.2.1) lib/action_dispatch/middleware/head.rb:14:incall' actionpack (3.2.1) lib/action_dispatch/middleware/params_parser.rb:21:in call'
actionpack (3.2.1) lib/action_dispatch/middleware/flash.rb:242:incall' rack (1.4.1) lib/rack/session/abstract/id.rb:205:在context'
rack (1.4.1) lib/rack/session/abstract/id.rb:200:in调用中'actionpack (3.2.1) lib/action_dispatch/middleware/cookies.rb:338:in call'
activerecord (3.2.1) lib/active_record/query_cache.rb:64:incall' activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:443:in call'
actionpack (3.2.1) lib/action_dispatch/middleware/callbacks.rb:28:inblock in call' activesupport (3.2.1) lib/active_support/callbacks.rb:405:_run__3528916854062403214__call__361791269275604860__callbacks'
activesupport (3.2.1) lib/active_support/callbacks.rb:405:in__run_callback' activesupport (3.2.1) lib/active_support/callbacks.rb:385:in _run_call_callbacks'
activesupport (3.2.1) lib/active_support/callbacks.rb:81:inrun_callbacks' actionpack (3.2.1) lib/action_dispatch/middleware/callbacks.rb:27:in call'
actionpack (3.2.1) lib/action_dispatch/middleware/reloader.rb:65:incall' actionpack (3.2.1) lib/ action_dispatch/middleware/remote_ip.rb:31:in call'
actionpack (3.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:16:incall' actionpack (3.2.1) lib/action_dispatch/middleware/show_exceptions.rb:56:in call'
railties (3.2.1) lib/rails/rack/logger.rb:26:incall_app' railties (3.2.1) lib/rails/rack/logger.rb: 16:in call'
actionpack (3.2.1) lib/action_dispatch/middleware/request_id.rb:22:incall' rack (1.4.1) lib/rack/methodoverride.rb:21:in call'
rack (1.4.1) lib/rack/runtime.rb:17:incall' activesupport (3.2.1) lib/active_support/cache/strategy/local_cache.rb:72:in call'
rack (1.4.1) lib/rack/lock.rb:15:incall' actionpack (3.2 .1) lib/action_dispatch/middleware/static.rb:53:in call'
railties (3.2.1) lib/rails/engine.rb:479:incall' railties (3.2.1) lib/rails/application.rb:220:in call'
rack (1.4.1) lib/rack/content_length.rb:14:incall' railties (3.2.1) lib/rails/rack/log_tailer .rb:14:incall'
rack (1.4.1) lib/rack/handler/webrick.rb:59:in服务' /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:111:in service'
/usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:70:inrun' /usr/local/lib/ruby/1.9.1/webrick/server.rb:183:in `block在 start_thread'