Answer:
The program writes out:
I recognize the vestiges of an old flame.
The code is syntactically correct and will compile and run, but what it does might not be what the 
author intended. (The author probably intended to write out a substring of the phrase.)

Strings are Immutable!

Programmers often forget that String objects are immutable. Once a String object has been constructed, it cannot be changed. This line of code:

str.substring( 16 );

creates a new object, containing a substring of the characters of the original object. However, the original object is not changed. Since the reference variable str continues to point to the original object, the new object immediately becomes garbage. The next statement

System.out.println( str );

writes out the characters in the original object.

Question 2:
How would you modify the program so that the new substring is written?