Three-dimensional modeling is one of the core issues in three-dimensional Geographic Information System (3D GIS). The paper is focused on 3D modeling based on boundary representation based on Java 3D. using primitive elements such as nodes, edges and faces, we present in this paper a new set of algorithms to model primitive objects by the combination of these primitive elements based on java 3D including quadrilateral faces, walls, pillars, etc and something useful is obtained.