In shipping port sector containers are the most dynamic and complex to manage. To provide adequate strategy for the increasing traffic, ports must either expand facilities or improve efficiency of operations. In investigating ways in which ports can improve efficiency, this paper outlines a container terminal simulation model and gives components architecture that are implemented with Java. The main goal of the present work is to be used as a help tool in a port decision support system. The object oriented software design using UML are deployed in this project. 1.