JTable hide and show columns

Question

I want to add some columns to a table (Swing JTable). Some of them will have a default size (e.g. 250), others will be hidden (so their size will be 0). I use this code:

Answer 1

try this something like this for example:

myTableModel = new DefaultTableModel();
myTableModel.setColumnIdentifiers(new Object[]{"ID", "Name"});
JTable myTable = new JTable(myTableModel);

// remember to save the references
TableColumn myTableColumn0 = guiLoteryNumbersTable.getColumnModel().getColumn(0);
TableColumn myTableColumn1 = guiLoteryNumbersTable.getColumnModel().getColumn(1);
//...

// remove temporary the column ("hide")
myTable.getColumnModel().removeColumn(myTableColumn1);

// then you restore that column when you need it ("show")
myTable.getColumnModel().addColumn(myTableColumn1);

That's the best way I know to hide a column.

Answer 2

JTable#removeColumn remove Column only from JTable view, more in this example

Answer 3

I think you have named your methods incorrectly, when you want to hide a column you will set

column.setMinWidth(0);
column.setMaxWidth(0);
column.setPreferredWidth(0);

but in your code you are doing this when you want to show a column which is exactly opposite.

Also there is no need to call this "setWidth" method on a TableColumn, read TableColumn#setWidth(int).

Answer 4

    HashMap<String,TableColumn> hashMap_columns = new HashMap<String,TableColumn>();

    DefaultTableColumnModel defaultTableColumnModel = (DefaultTableColumnModel)jtable.getColumnModel();

    Enumeration<TableColumn> enumeration = defaultTableColumnModel.getColumns();

    while (enumeration.hasMoreElements())
    {
           TableColumn tableColumn = enumeration.nextElement();

           hashMap_columns.put((String)tableColumn.getIdentifier(),tableColumn);

    }


    public void setColumnVisible(String identifier, boolean setVisible)
    {
            TableColumn tableColumn = hashMap_columns.get(identifier);

            if (setVisible)
            {
                // using a sorted map removes the need to check column index/position
                SortedMap<Integer,TableColumn> sortedMap = new TreeMap<Integer,TableColumn>();

                // retreive all visible columns 
                Enumeration<TableColumn> enumeration = defaultTableColumnModel.getColumns();

                while (enumeration.hasMoreElements())
                {
                    TableColumn column = enumeration.nextElement();

                    sortedMap.put(column.getModelIndex(),column);
                }

                // add the column of interest to the sorted map
                sortedMap.put(tableColumn.getModelIndex(),tableColumn);

                // remove all visible columns
                for (TableColumn column: sortedMap.values())
                {
                    defaultTableColumnModel.removeColumn(column);
                }

                // add all previously visible columns as well as the column of interest
                for (TableColumn column: sortedMap.values())
                {
                    defaultTableColumnModel.addColumn(column);
                }
            }
            else
            {
                defaultTableColumnModel.removeColumn(tableColumn);
            }
        }

Answer 5

instead of re-inventing the wheel you might consider to use JXTable (in the SwingX project) which supports hidden columns, comlete with a ui-control to allow users hiding/showing them dynamically - and a bunch of other useful thingies :).

Answer 6

public class TableColumnHider {

    private final JTable table;
    private final TableColumnModel tcm;
    private final Map hiddenColumns;

    public TableColumnHider(JTable table) {
        this.table = table;
        tcm = table.getColumnModel();
        hiddenColumns = new HashMap();
    }

    public void hide(String columnName, String keySig) {
        int index = tcm.getColumnIndex(columnName);
        TableColumn column = tcm.getColumn(index);
        hiddenColumns.put(columnName, column);
        hiddenColumns.put(keySig + columnName, new Integer(index));
        tcm.removeColumn(column);
    }

    public void show(String columnName, String keySig) {
        Object o = hiddenColumns.remove(columnName);
        if (o == null) {
            return;
        }
        tcm.addColumn((TableColumn) o);
        o = hiddenColumns.remove(keySig + columnName);
        if (o == null) {
            return;
        }
        int column = ((Integer) o).intValue();
        int lastColumn = tcm.getColumnCount() - 1;
        if (column < lastColumn) {
            tcm.moveColumn(lastColumn, column);
        }
    }
}