Thread: JTable visual glitch with more than 25-100 rows

You'd must set the row height manually, or embed a TableModelListener to re-calculate it upon modification.

public class RowResizer implements TableModelListener
{
	private JTable table;
	private int height;
 
	public RowResizer(JTable table) {
		this.table  = table;
		this.height = table.getRowHeight();
	}
 
	@Override
	public void tableChanged(TableModelEvent e) {
		int i;
		for (i = 0; i < table.getRowCount(); ++i) {
			TableCellRenderer renderer = table.getCellRenderer(0, 0);
			Component component = table.prepareRenderer(renderer, 0, 0);
			height = Math.max(height, (component.getPreferredSize()).height);
		}
		table.setRowHeight(height);
	}
}

table = new JTable();
model = (DefaultTableModel) table.getModel();
model.addTableModelListener(new RowResizer(table));

https://web.archive.org/web/20121022...RowHeight.html