public Component getTreeCellRendererComponent( JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) { Component c = super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus); if (value instanceof VariableNode) { VariableNode node = (VariableNode) value; tooltipText = node.getToolTipText(); if (node.var instanceof Structure) { Structure s = (Structure) node.var; setIcon(structIcon); tooltipText = s.getNameAndAttributes(); } else tooltipText = node.getToolTipText(); } else if (value instanceof DimensionNode) { DimensionNode node = (DimensionNode) value; tooltipText = node.getToolTipText(); setIcon(dimIcon); } else if (value instanceof GroupNode) { GroupNode node = (GroupNode) value; tooltipText = node.getToolTipText(); } return c; }