This is because jMemorize overrides the JTable.columnMarginChanged that is fired from the JTable constructor, when the user - derived class is not yet initialised. This can be easily fixed by initialising the table column model befor the table listeners are installed on it, I have comitted such patch. Unfortunately, this brings us to the second exception, related to the JFreeChart: java.lang.ClassCastException: gnu/java/awt/peer/gtk/GdkGraphics at org.jfree.chart.ChartPanel.paintComponent (ChartPanel.java:905) at javax.swing.JComponent.paint (JComponent.java:1583) at javax.swing.JComponent.paintChildren (JComponent.java:1700) at javax.swing.JComponent.paint (JComponent.java:1585) at javax.swing.JComponent.paintChildren (JComponent.java:1700) at javax.swing.JSplitPane.paintChildren (JSplitPane.java:538) at javax.swing.JComponent.paint (JComponent.java:1585) at javax.swing.JComponent.paintChildren (JComponent.java:1700) at javax.swing.JComponent.paint (JComponent.java:1585) at javax.swing.JComponent.paintChildren (JComponent.java:1700) at javax.swing.JSplitPane.paintChildren (JSplitPane.java:538) at javax.swing.JComponent.paint (JComponent.java:1585) at javax.swing.JComponent.paintChildren (JComponent.java:1700) at javax.swing.JComponent.paint (JComponent.java:1585) at javax.swing.JComponent.paintChildren (JComponent.java:1700) at javax.swing.JComponent.paint (JComponent.java:1585) at javax.swing.JLayeredPane.paint (JLayeredPane.java:647) at javax.swing.JComponent.paintChildren (JComponent.java:1700) Probably our JFreeChart experts could look at this. Regards Audrius. Robert Schuster wrote: >Hi, >I added jMemorize[0] to the list of Free Swing apps. I just stumbled over the >app and tried to run it but it fails with a NPE: > >java.lang.reflect.InvocationTargetException > at java.lang.reflect.Method.invokeNative (Native Method) > at java.lang.reflect.Method.invoke (Method.java:355) > at jamvm.java.lang.JarLauncher.main (JarLauncher.java:50) >Caused by: java.lang.NullPointerException > at jmemorize.gui.swing.CardTable.columnMarginChanged (Unknown Source) > at javax.swing.table.DefaultTableColumnModel.fireColumnMarginChanged >(DefaultTableColumnModel.java:493) > at javax.swing.table.DefaultTableColumnModel.setColumnMargin >(DefaultTableColumnModel.java:171) > at javax.swing.JTable.setIntercellSpacing (JTable.java:2950) > at javax.swing.JTable.initializeLocalVars (JTable.java:1720) > at javax.swing.JTable.<init> (JTable.java:1664) > at javax.swing.JTable.<init> (JTable.java:1582) > at jmemorize.gui.swing.CardTable.<init> (Unknown Source) > at jmemorize.gui.swing.FindFrame.<init> (Unknown Source) > at jmemorize.gui.swing.MainFrame.<init> (Unknown Source) > at jmemorize.core.Main.run (Unknown Source) > at jmemorize.core.Main.main (Unknown Source) > at java.lang.reflect.Method.invokeNative (Native Method) > ...2 more > >Since there are some Swing hackers who frequently work on JTable this might be a >low hanging fruit for them. > >cya >Robert > >[0] - http://riad.de/jmemorize > >
