Re: How to emluate "properties" in Java?

"Mike Schilling" <>
Tue, 2 Mar 2010 00:00:53 -0800
Peter Duniho wrote:

Arved Sandstrom wrote:

Direction to good web articles or even a book or two is fine, and
they can be as advanced as you think is necessary. I have in fact
been following everything you've said in this thread, and the
closest I see to any kind of explanation is a post of yours from
about 2115 on the 25th of Feb. There you made two points: one about
"more robust data binding", and one about the help that properties
provides to GUI designers. I'm not particularly concerned about GUI
designers, but perhaps you could direct me to some material that
expands on the first point.

You can infer conclusions about both points once you actually know
what really happens when you write a property in C# (i.e. as
opposed to forming an opinion about properties in C# without actually
know what they are or how they work). For example, this method
becomes possible:
That's the GetProperties() method from the System.Type class
(equivalent to Java's java.lang.Class class). There's simply no way
to write that method in Java simply by implementing properties as
conventionally named methods. I assume that you, or any other
reader, can correctly infer the value in such a method.

The Java Beans infrastructure does exactly that: it assumes that methods
that follow the conventions of

    public T getX();
    public void setX(T);

define properties, and uses reflection to find them.

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