compilation error - missing return statement

I have written following code which is giving me compilation error as " Missing return statement" , what could be the reason?

class SchoolStd {

int TotalDiv = 1;
int TotalStudents=0;

void CountDiv (int Value) {
TotalDiv= Value;
}

void CountStudent (int Value) {
TotalStudents= Value;
}


void FirstStdPrintState ( ) {
System.out.println (" Total No of Divisions for First standard" TotalDiv );
System.out.println ("Total no of students" TotalStudents );
}


Void SecondStdPrintState () {
System.out.println (" Total No of Divisions for First standard" TotalDiv );
System.out.println ("Total no of students" TotalStudents);
}
}

Here you don't have main function. So how can it be execute?

Make a class in which declare the main method and call the above mentioned method.