JAVADOC – Use of <code>

Since JDK1.5 these constructs can be replaced to give additional
functionality.
Long ending in ‘l’ instead of ‘L’

Replaced lowercase with uppercase to prevent confusion.
Import from Same Package

No need to import from within the same package in which you currently
reside. Removed unneeded imports.
java.lang Import

No need to import java.lang when it is automatically imported...
PERFORMANCE – Concatenation with Empty String

String.valueOf() is more efficient.