Easy Java Simulations (EJS) is a software tool to simplify the creation of Java simulations of physical systems. It provides a simple interface for creating simulations, where the user needs only to enter the equations of motion for the physical system being modeled. Only limited programming experience is needed to create the simulations. Importantly, the visualization of the model is greatly simplified through a drag-and-drop interface. Examples and instructions are provided. Source code is available as this is part of the Open Source Physics project.