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Looks like race condition. Should be called from AWT thread. java.lang.NullPointerException at com.sun.java.swing.plaf.nimbus.NimbusStyle.init(NimbusStyle.java:418) at com.sun.java.swing.plaf.nimbus.NimbusStyle.validate(NimbusStyle.java:359) at com.sun.java.swing.plaf.nimbus.NimbusStyle.getValues(NimbusStyle.java:927) at com.sun.java.swing.plaf.nimbus.NimbusStyle.getInsets(NimbusStyle.java:605) at javax.swing.plaf.synth.SynthStyle.installDefaults(SynthStyle.java:896) at javax.swing.plaf.synth.SynthLookAndFeel.updateStyle(SynthLookAndFeel.java:276) at javax.swing.plaf.synth.SynthTextFieldUI.updateStyle(SynthTextFieldUI.java:62) at javax.swing.plaf.synth.SynthTextFieldUI.installDefaults(SynthTextFieldUI.java:218) at javax.swing.plaf.basic.BasicTextUI.installUI(BasicTextUI.java:765) at javax.swing.plaf.synth.SynthTextFieldUI.installUI(SynthTextFieldUI.java:235) at javax.swing.JComponent.setUI(JComponent.java:673) at javax.swing.text.JTextComponent.setUI(JTextComponent.java:322) at javax.swing.text.JTextComponent.updateUI(JTextComponent.java:332) at javax.swing.text.JTextComponent.<init>(JTextComponent.java:306) at javax.swing.JTextField.<init>(JTextField.java:212) at javax.swing.JTextField.<init>(JTextField.java:153) at org.netbeans.modules.exceptions.ReportPanel.initComponents(ReportPanel.java:76) at org.netbeans.modules.exceptions.ReportPanel.<init>(ReportPanel.java:60) at org.netbeans.modules.uihandler.Installer$SubmitInteractive.createDialog(Installer.java:1802) at org.netbeans.modules.uihandler.Installer$Submit.run(Installer.java:1493) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:577) [catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1030)
From nbusers: I confirm that: Windows XP & Java JDK 1.6.0_14-b08 : Netbeans 6.7 crashes when started with "-laf Nimbus" parameter (same log like Rhizomorph posted) and when you preview a form file in the NB designer with Nimbus LaF, the form doesn't show.
there's a similar report even when the component has been created on AWT thread: http://www.netbeans.org/issues/show_bug.cgi?id=168636
*** Issue 170468 has been marked as a duplicate of this issue. ***
*** This bug has been marked as a duplicate of bug 168636 ***