Using the static modifier on a field will cause it to associated with the class rather than to any object (world or actor). For constant values, use final as well: In a MyWorld class, this line can be used for the dimensions of all MyWorld objects: Declared public, as above, these values can be accessed from anywhere within your project using the name of the class where they are located: Constant fields (those declared final), by convention, are given names in all uppercase characters. Please note that any non-final (variable) static field will retain its current value when resetting the scenario (only re-compiling will reset the field to its initial value). So, your initial world should ensure it is set appropriately at the start of a run.