FontConfig fails when optional system library is missing

Phil Race philip.race at
Mon Jul 18 22:14:27 UTC 2011

Ah you said it was AIX, not Linux. Still,  it should have that library 
even if the de-ref is fixed.


On 7/18/2011 3:12 PM, Phil Race wrote:
> Steve,
> There's no attachment .. and this should be discussed on 2d-dev, not 
> core-libs.
> I do see in the code where the null de-ref can happen. This is some 
> new JDK 7 code.
> Although a system where the library is missing is basically DOA for 
> client use.
> I'd suspect you are running 32 bit JDK on a 64 bit Linux which hasn't had
> the 32 bit libs installed. If so, likely you'll run into other 
> problems too.
> -phil.
> On 7/18/2011 2:37 PM, Steve Poole wrote:
>> Hi all, a problem was discovered on JDK7 when using the Nimbus L&F on 
>> a system where was not installed (On AIX actually 
>> but in theory on any unix system)
>> Under the covers Nimbus uses the sun.font.FontConfigManager to 
>> retrieve fonts. sun.font.FontConfigManager in turn is intended to use 
>> (for a unix system) the system library if present.
>> The code is intended to cope with the library being missing but it 
>> unfortunately doesn't. A array is referenced without checking if it 
>> is null. On systems where the system library is present this array is 
>> never null but in this specific case the array is null and the 
>> reference fails as follows.
>>>> Exception in thread "main" java.lang.NullPointerException
>> at 
>> sun.font.FontConfigManager.getFontConfigFont(
>> at sun.awt.X11FontManager.getFontConfigFUIR(
>> at sun.font.FontUtilities.getFontConfigFUIR(
>> at javax.swing.plaf.nimbus.NimbusDefaults.<init>(
>> at 
>> javax.swing.plaf.nimbus.NimbusLookAndFeel.<init>(
>> at Nimbus.main(
>> The fix is trivial (see attached) and probably just tactical.
>> Cheers,
>> Steve

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