Definition   The SUPERFICIAL SIGNATURE of a Java program fragment is the fragment with...

1. All literals (constants) replaced by their type in angular brackets.
   
2. All objects referenced by variables replaced by the type of the object in angular brackets.
   

Given the code:
int x = 5;
double y = 3.5;
double p = x * y;
IO.println (``This product is ``+ p); 

The superficial signatures would be:
int x = < int >;
double y = < double >;
double p = < int > * < double >;
IO.println (< String > + < double >);