Sudoku Solver in Java

After some fiddling with XCode and C++, I finally got it compiling my Hello World. To my pleasure, the syntax in C++ is somewhat similar with Java, but there are still many differences.

In Java, to start a class we use:
public class fileName
{
}
In a command line C++ program, the following lines are needed:
#include <iostream>
using namespace std;
iostream [...]