HW4 Answers

 

 

 

Comments:

 

• Copy both the java files in the <src/SimpArc> directory.

<src> directory is the directory that contains all the java source code for devsJava project.

 

• Open the devsjava project that you have build earlier.

 

• Add the two files in the <SimpArc> package by right-clicking the <SimpArc> package in the project window (left frame) and then selecting <Add files/Packages/Classes>

 

• Run the SimView after Rebuilding the project

 

• In the GUI window choose <preyPredator> as the model

 

 

 

Atomic Model (preyPredator.java)

 

The description of the solution has been given in the previous solution (HW3 Answers). As this is the java code for the same solution, it should be understood with respect to HW3 Answer.

 

In this java implementation, apart from the usual functions of  initialize(), deltext(), deltint(), deltcon() and out(), a new function getTooltipText() is introduced. This function is very useful in showing the information contained in various variables inside the atomic model, when the mouse is brought over the particular atomic model. Its an “atomic” library function. As a result super.getTooltipText() is called to print the default values like modelName, phase, sigma, tL and tN. This method returns a String. So any other information that needs to be displayed is concatenated as String to this default display.

 

In this particular example, Values of prey and predator are added to the default String.