Implement a queue using a linked list
There is no point in having the constructor for Node require the 'next' node. It is never part of the constructor, in your code.
The default constructor is useless code here. You may as well remove it, it does nothing.
the method getCount should be called size to be conformant with other classes.
I prefer when people use just one signal for the system state. In your code, you use size == 0 in some places to determine if the queue is empty, and in other places you use front == null


Otherwise the code looks functional, and neat.