What is overloading
Overloading is when a name or symbol has different meanings in different contexts.
You overload a method or construtor when a class has have two methods (or constructors) with the same name but different number, type, order of parameters.
Java doesn’t allow programmer defined operator overloading (the way C++ and Python do), but there is (at least) one overloaded operator built into the definition of the language: the + operator means addition when its operands are numeric, but string concatenation when at least one of its operands is of type java.lang.String.
What is overriding
Overriding is when you override a method in a subclass that would otherwise be inherited from a superclass.
It is good practice to include the [annotation] @Override to indicate your intention to override the method. That way if you get the spelling, case, or method signature wrong (number and type of params), you’ll get a compiler error, and catch your mistake early.
More
http://www.programmerinterview.com/index.php/java-questions/method-overriding-vs-overloading/