Win a copy of Rust Web Development this week in the Other Languages forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Tim Cooke
  • Campbell Ritchie
  • Ron McLeod
  • Liutauras Vilda
  • Jeanne Boyarsky
Sheriffs:
  • Junilu Lacar
  • Rob Spoor
  • Paul Clapham
Saloon Keepers:
  • Tim Holloway
  • Tim Moores
  • Jesse Silverman
  • Stephan van Hulst
  • Carey Brown
Bartenders:
  • Al Hobbs
  • Piet Souris
  • Frits Walraven

Point2d.Double and Point2d.float

 
Greenhorn
Posts: 23
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Point2d class is an abstract class and has Point2d.Float and Point2d.Double as inner classes. I saw in one book of Java by Igor Hortan i think where he created instances of inner classes with out creating a outer Object. He had code like new Point2d.Float().
 
Marshal
Posts: 74684
335
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Point2D.Float, not Point2d.Float. You have to be very careful about capital letters.

If you look through the API documentation for the Point2D class you will find you cannot instantiate Point2D anyway; you have to use one of the other three classes mentioned there. You can therefore write new Point2D.Float(1.0f, 99f);

I shall let you go through the API yourself to see what it says about not instantiating Point2D.
 
Manish Khurana
Greenhorn
Posts: 23
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
YOU WROTE : new Point2D.Float(1.0f, 99f);
i had looked at api before. This means you are calling the constructor on an inner class that extends the enclosing class. As I understand it is not possible to create a object of the inner class without an object of the outer class.
 
Ranch Hand
Posts: 226
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Looked up nested classes. There are 2 kinds of nested classes static and non-static (inner). Point2D uses static classes.
 
Let's get him boys! We'll make him read this tiny ad!
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop
https://coderanch.com/wiki/718759/books/Building-World-Backyard-Paul-Wheaton
reply
    Bookmark Topic Watch Topic
  • New Topic