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StringWorker and UtilityWorker.
The StringWorker has static methods which are used to convert a given
String to a List containing the commands to be executed. The command string
is of this format: "LOGO>FD 10\nLOGO>fd 10 rt 10". So
the StringWorker has two methods lastCommand(), which will parse out the
last command entered by the user, and lastCommandArr(), which parses the
string to a list containing the command and associated values.
public static String lastCommand(String s){
…….
public static List lastCommandArr(String s){
……..
The UtilityWorker class has three methods. The doIt method takes a List(of
commands entered by user) and a DrawArea, and runs the users command on
the DrawArea. doIt1 is a private method used by doIt() for fulfilling
its job.
public static void doIt(DrawArea dw, java.util.List ll) {
……..
private static List doIt1(DrawArea dw, java.util.List l){
…………
upDateText is method which updates text relating to GUI.
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