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Java Quick Syntax Reference
book

Java Quick Syntax Reference

by Mikael Olsson
January 2018
Intermediate to advanced content levelIntermediate to advanced
115 pages
1h 37m
English
Apress
Content preview from Java Quick Syntax Reference
© Mikael Olsson 2018
Mikael OlssonJava Quick Syntax Referencehttps://doi.org/10.1007/978-1-4842-3441-9_13

13. Overriding

Mikael Olsson1 
(1)
Hammarland, Länsi-Suomi, Finland
 

A member in a subclass can redefine a member in its superclass. This is most often done to give instance methods new implementations.

Overriding members

In the following example, Rectangle’s getArea method is overridden in Triangle by redeclaring it there with the same method signature. The signature includes the name, parameters, and return type of the method. However, the access level may be changed to allow for more access than the method being overridden:

class Rectangle
{
  public int w = 10, h = 10;
  public int getArea() { return w * h; }
}
class Triangle extends Rectangle
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