In later modules, we can do more advanced enhancements of this basic program:

• put this in a package,org.wikibooks.java.distance, instead of the default package
• Change the type ofa,b fields to java.awt.Point2D
• Overload the constructor with a Distance(Point2D, Point2D) constructor
  • first constructor calls this((Point2D, Point2D)
  • copy arguments defensively since Point/Point2D are mutable.
• Change Point to Point2D.Double and change the constructor to take doubles not ints and change main to parse doubles not ints.
• define a new Point3D interface (extends Point2D) and Point3D.Double (extends Point2D.Double?)class to show how the Distance program can work with other Points
• Add exception handling around the String->number parsing and array indexing in main
• use number formats for the points, distance
• use internationalization/resource bundles for the text, number formats

--djb18:26, 28 January 2006 (UTC)Reply

Could this example be a bit confusing to newbies to the language? --Mattylaws (talk)12:44, 10 March 2010 (UTC)Reply

How do you use the distance program in eclipse? It isn't obvious how points can be entered the command prompt seems unresponsive.

jc@JCMAIN:~/java$ javac Distance.java Distance.java:1: 'class' or 'interface' expected{^1 error

- Any ideas?161.112.83.10210:40, 7 October 2007 (UTC)Reply

This didn't compile for me until I changed:

...

privatestaticintintValue(Stringdata){returnInteger.parseInt(data);}}

To:

privatestaticintintValue(Stringdata){returnjava.lang.Integer.parseInt(data);}}

That said I really don't know what I'm doing here, and just got the idea to try that off of some random googling. Should the page be changed, or maybe there's a better fix. --Keithonearth (talk)19:09, 21 August 2009 (UTC)Reply

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