Question: Referencing a Java Object
I think I'm suffering from an attack of the 'stupids'. I can't figure out how to do this and I'm sure it's something simple. Any help would be appreciated. I'm simplifying this and I hope I don't mess it up as a result.
I have 4 classes, each written by a different programmer (so no one knows what another person called something). These classes are: MyFrame (extends JFrame), MyData (a data storage object that contains the method 'setData1 (int x)'), MyPanel1 (extends JPanel), and MyPanel2 (extends JPanel).
When the program is run, MyFrame makes 2 objects: Data1 (from MyData) and Panel1 (from MyPanel). In its constructor, MyPanel makes object Panel2 (from MyPanel2).
Now... the question. At some point, Panel2 wants to write something to Data1. What is the proper syntax and/or mechanisms to do this? Remember, in this example, the MyData object is named Data1, but in 'reality' the object can be called anything the programmer wants
I hope this makes sense.
Thanks
MistWing SilverTail
You'll need to pass references around (usually in the constructors), but since you (I'm assuming) can't change/rewrite the classes.... I don't think it could be done.
Even if MyData was declared public, Panel2 can't see MyFrame.
Good luck,
Radish21
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I met a problem as demo in my code below when i use XTream to persist my Java Object;
How can I use XStream to persist complicated Java Object to XML & backward??
See
[1] main code
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private LocationTest location;
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}[2].
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}[3].
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g2.setPaint(Color.red);
g2.fill(ball);
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int h = getHeight();
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}OK, My questions are:
[1]. what I generated XML by XSTream is very complicated, especially for object LocationTest, Can we make it as simple as others such as Person object??
[2]. after I run it, LocationTest will popup and a red ball in a panel will dsiplay, after I change red ball's position, I hope to persist it to xml, then when I read it back, I hope to get same picture, ie, red ball stiil in old position, How to do that??
Thanks a lot!!Positive feedback? Then please take this in a positive way: if you want to work on persisting Java objects into XML, then GUI programming is irrelevant to that goal. The 1,000 lines of code you posted there appeared to me to have a whole lot of GUI code in it. You should produce a smaller (much smaller) example of what you want to do. Calling the working code from your GUI program should come later.
-
How to parse XML to Java object... please help really stuck
Thank you for reading this email...
If I have a **DTD** like:
<!ELEMENT person (name, age)>
<!ATTLIST person
id ID #REQUIRED
>
<!ELEMENT name ((family, given) | (given, family))>
<!ELEMENT age (#PCDATA)>
<!ELEMENT family (#PCDATA)>
<!ELEMENT given (#PCDATA)>
the **XML** like:
<person id="a1">
<name>
<family> Yoshi </family>
<given> Samurai </given>
</name>
<age> 21 </age>
</person>
**** Could you help me to write a simple parser to parse my DTD and XML to Java object, and how can I use those objects... sorry if the problem is too basic, I am a beginner and very stuck... I am very confuse with SAXParserFactory, SAXParser, ParserAdapter and DOM has its own Factory and Parser, so confuse...
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A bit more question for dear people:
In the notes, it's mainly focus on JAXB,
1. Is that mean JAXB is most popular parser for
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Of course the above essay leaves out lots and lots of detail, but I think that it touches the most important points.
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When parser job is done,
what kind of Java Object we will get? (String,
InputStream or ...)See above, typically it's an object whose type is defined as a class (and interface in 1.0) within the sources that JABX generates. Or it can be a String or one of the primitive types - you tell the "compiler" in the schema (xjs file in EA) what you want!
2. If we want to use JAXB, we have to contain a
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I am very new to XML, is there any simpler way to get
around them? It has already take me 4 days to find a
simple parser which give it XML and DTD, then return
to me Java objects ... I mean if that kind of parser
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DipeshCross post!
http://forum.java.sun.com/thread.jsp?forum=32&thread=260589 -
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"ag" <[email protected]> wrote:
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thanksCan you clarify this question?
I'm going to give an initial answer, based on a guess as to what you meant:
BCEL lets you access the internals of a compiled Java class file (aka, the bytecode, aka the object code).
Maybe you are looking for
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