•HLine
paintOn messages in HLine unit test (main)
–line
106: hline1.paintOn(screen)
–line
108: hline1.paintOn(screen, 0, 1)
•Two
declarations for paintOn in HLine.java:
–line
39: paintOn(Screen, int, int)
–line
52: paintOn(Screen)
– line 54 delegates work to first paintOn
(could use this)
•JVM
uses shape of message to select method
• Signature: method name & types of
parameters
•