Programmatically Making Selections in a JTable Component
To select columns, setColumnSelectionInterval(),
addColumnSelectionInterval(), and
removeColumnSelectionInterval() are available. However, these
only work if columnSelectionAllowed is true and
rowSelectionAllowed is false. This also applies to rows.
To select individual cells or blocks of cells, use
changeSelection(). However, both columnSelectionAllowed and
rowSelectionAllowed must be false.
These selection methods observe the setting of the selection
mode. For example, if the selection mode is SINGLE_SELECTION,
only a single row, column, or cell can be made. See
Enabling Single or Multiple Selections in a JTable Component for more information on
selection modes.
int rows = 10;
int cols = 5;
JTable table = new JTable(rows, cols);
// Use this mode to demonstrate the following examples
table.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
// The following column selection methods work only if these
// properties are set this way
table.setColumnSelectionAllowed(true);
table.setRowSelectionAllowed(false);
// Select a column - column 0
table.setColumnSelectionInterval(0, 0);
// Select an additional range of columns - columns 1 to 2
table.addColumnSelectionInterval(1, 2);
// Deselect a range of columns - columns 0 to 1
table.removeColumnSelectionInterval(0, 1);
// The following row selection methods work only if these
// properties are set this way
table.setColumnSelectionAllowed(false);
table.setRowSelectionAllowed(true);
// Select a row - row 0
table.setRowSelectionInterval(0, 0);
// Select an additional range of rows - rows 1 to 2
table.addRowSelectionInterval(1, 2);
// Deselect a range of rows - rows 0 to 1
table.removeRowSelectionInterval(0, 1);
// The following cell selection methods work only if these
// properties are set this way
table.setColumnSelectionAllowed(true);
table.setRowSelectionAllowed(true);
// Select a cell: cell (2,1)
int row = 2;
int col = 1;
boolean toggle = false;
boolean extend = false;
table.changeSelection(row, col, toggle, extend);
// Extend the selection to include all cells between (2,1) to (5,3)
row = 5;
col = 3;
toggle = false;
extend = true;
table.changeSelection(row, col, toggle, extend);
// Deselect a cell: cell (3,2)
// All cells in the row and column containing (3,2) are deselected.
row = 3;
col = 2;
toggle = true;
extend = false;
table.changeSelection(row, col, toggle, extend);
// This method actually toggles the selection state so that
// if it were called again, it exactly reverses the first call.
// Select cell (3,2) as well as the other cells that
// were deselected in the first call.
toggle = true;
extend = false;
table.changeSelection(row, col, toggle, extend);
// Select all cells
table.selectAll();
// Deselect all cells
table.clearSelection();
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