java.lang.OutOfMemoryError: Java heap space
   at java.awt.image.DataBufferInt.<init>(DataBufferInt.java:75)
   at com.sun.java.swing.plaf.gtk.GTKEngine.finishPainting(GTKEngine.java:589)
   at com.sun.java.swing.plaf.gtk.GTKEngine.finishPainting(GTKEngine.java:580)
   at com.sun.java.swing.plaf.gtk.GTKPainter.paintViewportBorder(GTKPainter.java:630)
   at javax.swing.plaf.synth.SynthScrollPaneUI$ViewportBorder.paintBorder(SynthScrollPaneUI.java:255)
   at javax.swing.JComponent.paintBorder(JComponent.java:946)
   at javax.swing.JComponent.paint(JComponent.java:1054)
   at javax.swing.JComponent.paintChildren(JComponent.java:886)
   at javax.swing.JComponent.paint(JComponent.java:1062)
   at javax.swing.JComponent.paintChildren(JComponent.java:886)
   at javax.swing.JComponent.paint(JComponent.java:1062)
   at javax.swing.JComponent.paintChildren(JComponent.java:886)
   at javax.swing.JComponent.paint(JComponent.java:1062)
   at javax.swing.JLayeredPane.paint(JLayeredPane.java:586)
   at javax.swing.JComponent.paintChildren(JComponent.java:886)
   at javax.swing.JComponent.paint(JComponent.java:1062)
   at javax.swing.JComponent.paintChildren(JComponent.java:886)
   at javax.swing.JComponent.paint(JComponent.java:1062)
   at org.netbeans.core.windows.view.ui.MainWindow$1.paint(MainWindow.java:189)
   at javax.swing.JComponent.paintChildren(JComponent.java:886)
   at javax.swing.JComponent.paint(JComponent.java:1062)
   at javax.swing.JLayeredPane.paint(JLayeredPane.java:586)
   at javax.swing.JComponent.paintChildren(JComponent.java:886)
   at javax.swing.JComponent.paint(JComponent.java:1062)
   at javax.swing.JComponent.paintToOffscreen(JComponent.java:5223)
   at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:290)
   at javax.swing.RepaintManager.paint(RepaintManager.java:1265)
   at javax.swing.JComponent._paintImmediately(JComponent.java:5171)
   at javax.swing.JComponent.paintImmediately(JComponent.java:4982)
   at javax.swing.RepaintManager$4.run(RepaintManager.java:824)
   at javax.swing.RepaintManager$4.run(RepaintManager.java:807)
   at java.security.AccessController.doPrivileged(AccessController.java:0)