--- PASS: THESE LINES SHOULD MATCH ---
"Hi," said Rover.
This is a "really fun" lab exercise.  I "like it" a lot.
Brits call them "inverted commas."

--- FAIL: THESE LINES SHOULD NOT MATCH ---
I 'like' Ike
One quote mark " is not enough
An empty string in Java is "".
The previous line fails because it needs something between the " quotes.