Problem with JPopupMenu (I think...)

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hiwa - 19 Jan 2005 23:40 GMT

One of the top five worst practices for GUI programming:
-Instantiating a component in an event listener.

It also belongs to the top five never-do-it practices for GUI programming.

BTW, is accessing client's System.out in an applet legal? I'm
not so sure about it.

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Andrew Thompson - 20 Jan 2005 08:54 GMT

> BTW, is accessing client's System.out in an applet legal?

No[1], not unless it is signed.

[1] <http://mindprod.com/jgloss/applet.html#RESTRICTIONS>

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Roland - 21 Jan 2005 11:02 GMT

>>BTW, is accessing client's System.out in an applet legal?
>
> No[1], not unless it is signed.
>
> [1] <http://mindprod.com/jgloss/applet.html#RESTRICTIONS>

I think that needs some further clarification.

In an unsigned applet you *can* print to System.out/System.err (using
System.out.println(), System.err.print(foo) etc.). The output will show
up in the Java console.
But you cannot change System.out/System.err to your own PrintStream.
Calling System.setOut(PrintStream) or System.setErr(PrintStream) in an
unsigned applet (with default security permissions) will throw a
security exception.

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blue - 20 Jan 2005 15:07 GMT

I tried changing the code so that no components are instantiated in the
event listeners, this did not help.

Thanks for the insight? though.

Frank

> One of the top five worst practices for GUI programming:
> -Instantiating a component in an event listener.
[quoted text clipped - 3 lines]
> BTW, is accessing client's System.out in an applet legal? I'm
> not so sure about it.

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RC - 20 Jan 2005 21:54 GMT

All System.out will go to Java console for Applets.

> I tried changing the code so that no components are instantiated in the
> event listeners, this did not help.
[quoted text clipped - 10 lines]
> > BTW, is accessing client's System.out in an applet legal? I'm
> > not so sure about it.

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Problem with JPopupMenu (I think...)

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