circuit analysis - Current and voltage sources?

^{simulate this circuit – Schematic created using CircuitLab}

From what I understand, the magnitude and direction from an independent current source is constant. What would happen in the circuit above? If currents flow they way they're supposed to from the current source, KCL is violated. So how would the circuit above behave?

How about this one?

^{simulate this circuit}

Answer

In circuit 1 you get infinite voltages and in circuit 2 you get zero current.

EDIT due to wrong circuit posted in question - circuit 2 takes 45mA and I'm not inclined to feed the reasons on a plate to the OP because this sort of stuff should be reasoned through.