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via Oracle Community by 807587, 1 year ago
This exception has no message.
java.lang.ClassCastException at joyconn.MyTreeCellRenderer.getTreeCellRendererComponent(Frame1.java:275) at javax.swing.plaf.basic.BasicTreeUI$NodeDimensionsHandler.getNodeDimensions(BasicTreeUI.java:2751) at javax.swing.tree.AbstractLayoutCache.getNodeDimensions(AbstractLayoutCache.java:475) at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.updatePreferredSize(VariableHeightLayoutCache.java:1342) at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.getPreferredWidth(VariableHeightLayoutCache.java:1159) at javax.swing.tree.VariableHeightLayoutCache.getMaxNodeWidth(VariableHeightLayoutCache.java:990) at javax.swing.tree.VariableHeightLayoutCache.getPreferredWidth(VariableHeightLayoutCache.java:291)