Javra is a Java package for handling VRML scene graph. Javra is based upon the external authoring interface(EAI).As programming tool between Java and VRML,Script node and EAI have some weaknesses,which can be overcome by Javra,for example,.after a user acted,VRML events generated real-time can be caught and handled in Javra.The combination of Javra and a VRML browser forms an effective start for generating 3D interactive applications.