Java permits a class to replace (or override) a method that it has inherited. A subclass can define a method with the SAME signature as a superclass method.

Overloading

Two methods have the same name but DIFFERENT signatures — the parameter types and/or the number of parameters are different.

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public StringBuilder append (int a);
public StringBuilder append (String s);
public StringBuilder append (int a, int b);
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Overriding

A method in the subclass has the SAME signature as a method in the superclass.

Calling An Overridden Method Within a subclass definition, you can call the superclass method with the “super” reference.

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