java.lang.NoClassDefFoundError: Failed resolution of: Ljava/awt/GraphicsEnvironment

• 问题描述
  在android上跑weka的时候找不到类了，应该是weka包的问题，在Stack Overflow上面找到了合适的解答

• 答案
  https://stackoverflow.com/questions/39198576/error-on-using-weka-library-on-android-want-to-implement-machine-learning-in-an

• 解决方法
  更换jar包为 wekaSTRIPPED.jar
  https://github.com/greedygrammar/Weka-for-Android

原作者github
https://github.com/rjmarsan/Weka-for-Android