Welcome GridCity is an add-on to Java that allows new programmers to write Java programs that control vehicles in a graphical world.
Programs typically instruct vehicles to move around as well as to pickup and deliver parcels.
Also, different programming paradigms can be explored such as stepwise refinement and object-oriented programming. Below is an example of a GridCity program in operation. Click on the run button and the vehicles will arrange parcels to spell hi . A primary advantage of this approach is that programmed actions are visible on the screen during operation. This approach is in sharp contrast to traditional programming where programmed actions take place inside the computer and are not easily visible.