Hi Alexander, > Could you send a code snippet from your application that reproduces the > NPE? > I think we should investigate first why the JTable.prepareRenderer() > returns null in this case.
Sorry for the lag - I have been on vacation. I'll prepare something tomorrow. Regards, Clemens > > Thanks, > Alexandr. > > > On 4/18/2013 9:37 AM, Miguel Muñoz wrote: >> >> JTable.prepareRenderer() should never return null. There's nothing in the >> API to suggest that null is a valid return value. I have found (and >> reported) at least one bug in Nimbus where it returns a null renderer when >> the column class is Icon. I think that's fixed, but I wouldn't be surprised >> if there are others. >> >> — Miguel Muñoz >> >> >> On Apr 16, 2013, at 7:55 AM, Alexander Scherbatiy wrote: >> >>> On 4/13/2013 2:19 PM, Clemens Eisserer wrote: >>>> >>>> Hi, >>>> >>>> When testing a legacy application which was using Metal LnF previously >>>> with Nimbus I ran into the following problem: >>>> >>>> Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException >>>> at >>>> javax.swing.plaf.synth.SynthTableUI.paintCell(SynthTableUI.java:685) >>>> at >>>> javax.swing.plaf.synth.SynthTableUI.paintCells(SynthTableUI.java:581) >>>> ...... >>>> >>>> the code in question is: >>>> >>>> TableCellRenderer renderer = table.getCellRenderer(row, column); >>>> Component component = table.prepareRenderer(renderer, row, column); >>>> Color b = component.getBackground(); >>> >>> >>> Could you check that returning the null component is the correct >>> behavior in this case? >>> So there is no the real bug that does not allow to return the right >>> component. >>> >>>> >>>> I've written a patch to simply check for "component" to be non-null: >>>> http://cr.openjdk.java.net/~ceisserer/nimbusnpe/ >>>> <http://cr.openjdk.java.net/%7Eceisserer/nimbusnpe/> >>>> >>>> Unfortunately I don't have a bug number, as the old bug-submission >>> >>> There are 2 issues with the NPE in paintCell chain call in JTable: >>> 6582564 JTable with rowHeader and sorting given NPE when inserting a >>> new row >>> http://bugs.sun.com/view_bug.do?bug_id=6582564 >>> 6429812 NPE after calling JTable.updateUI() when using a header >>> renderer + XP L&F >>> http://bugs.sun.com/view_bug.do?bug_id=6429812 >>> >>> This issue is different so I can create the new one. >>> >>> Thanks, >>> Alexandr. >>> >>>> system seems to be dead. >>>> >>>> Please let me know what you think. >>>> >>>> Regards, Clemens >>> >>> >> >> ------------------------------------------- >> >> Miguel Muñoz >> [email protected] <mailto:[email protected]> >> 323/225-7285 >> >> ------------------------------------------- >> >> /The Sun, with all those planets revolving around it and dependent on it, >> can still ripen a vine of grapes like it had nothing else to do in the >> world./ >> >> -- Galileo >> >> ------------------------------------------- >> / >> / >> /There are seven sins in the world./ >> / Wealth without work./ >> ///Pleasure without conscience./ >> ///Knowledge without character./ >> ///Commerce without morality./ >> ///Science without humanity./ >> ///Worship without sacrifice./ >> ///Politics without principle./// >> / >> / >> -- Mohandas Gandhi >> >> ------------------------------------------- >> >> /If tyranny and oppression come to this land, it will come in the guise of >> fighting a foreign enemy./ >> >> -- James Madison >> >> >> >
