Re: How do you implement global data?
Knute Johnson wrote:
I have some data that I need to have accessible to multiple classes. The
data is initialized from the constructor of one class by reading a
file. That same class has an editor that can modify that data.
Currently I'm just creating the variables as static in the one class.
Findbugs complains that this is "tricky (which it is) and bad practice".
How would you setup shared data under these conditions?
I'm not sure I understand the question completely.
You're saying you read some data from a file and stuff it in a static
variable?
class Editor {
static String myData;
public Editor( IOStreamReader file ) {
// read data into myData from file...
}
}
Yes, this is pretty evil. If you need direct access to the data, you
should at least go through a getter and a setter. JTextArea has, iirc, a
getText and a setText. So if a second class needs to modify myData, it
uses the getter, makes changes, then invokes the setter. However in any
case I'd ditch the static modifier. It's not needed and will probably
produce some really unexpected behavior eventually.
If you're asking something different, I'm not sure what it is. More info?
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