How do I list values of an arrays in a comma seperted list

[nmvictor]

HI everyone, I am working on an application to help students in our university register units(well don't mind units, something like subjects to be undertaken in a particular semester) on-line.Now I have everything working up to the point of registration so definitely it would be a good idea to tell the student of not only the successful unit registration but also list the successfully registered units.During the registration, the students input is a line containing the following information

 CAMPUSNAME REG-NUMBER UNIT1-UNIT2-UNIT3-...-UNIT8.

I split the above with the code below

System.out.println("Enter CAMPUSNAME REG-NUMBER UNIT1-UNIT2-UNIT3-...-UNIT8 the  units MUST not exceed 8: ")
String studentsInput = new Scanner(System.in).nextLine( );
String inputParts [ ]  = studentsInput.split( " ") ;
/*campus, regNumber units and unitCodes [ ] were  declared as instance fields somewhere up there ^ /*
campus = inputParts[ 0 ]; 
regNumber = inpuParts[ 1 ];
units = inputParts[ 2 ] ;

Since units is our point of interest here, i'll ignore the rest.So the units is something like SMA100-SCH300-SBC400-SPH100-SCH200 .I further split the units with '-' as the delimiter,

unitCodes  = units.split ( "-") ;

Now I have the students campus, regNumber and an array of unitCodes the student wishes to register, just what the function below

 registerUnits (String _campus, String _regNumber, String _unitCodes [] )

needs, so I call the function and passes the parameters to it, and the rest is up to me.Now here is what you might be up to,Apparently the function registerUnits( ) { } does everything right and now I have to tell the student that the unit registration was successful.I can easily do that, with ...

System.out.println(regNumber+": You successfully registered  "+unitCodes.length +" units.");

However, I would really appreciate listing the units in a coma separated list, so I worked this out but it just isn't taking me nowhere,

for(int i = 0;i<unitCodes.length;i++)
       String  registeredUnits = unitCodes[ i ]+",";

then i would append the registeredUnits to the message that I would tell the student

System.out.println("You successfully registered the units: "+registeredUnits+".Thanks for using this service.");

But like I said the output of the above isn't the best several modifications have just appended either the first unit (unitCodes[ 0 ]") or the first and the last (unitCodes[unitCodes.length]) units to the output,which isn't encouraging to a young programmer.Anyone with a better idea on how I would go about this?

[ocean]

Oo you double posted =) Still missing { } on the loop =) dont you?

[Eranga]

Please don't post the same question more than once next time, even in different sub-forums.