The Java Developers Almanac 1.4

Home > List of Packages > javax.swing.table [62 examples] > Selection [6 examples]

e942. Getting the Selected Cells in a JTable Component

The method for determining the selected cells depends on whether column, row, or cell selection is enabled.

    JTable table = new JTable();
    
    if (table.getColumnSelectionAllowed()
            && !table.getRowSelectionAllowed()) {
        // Column selection is enabled
        // Get the indices of the selected columns
        int[] vColIndices = table.getSelectedColumns();
    } else if (!table.getColumnSelectionAllowed()
            && table.getRowSelectionAllowed()) {
        // Row selection is enabled
        // Get the indices of the selected rows
        int[] rowIndices = table.getSelectedRows();
    } else if (table.getCellSelectionEnabled()) {
        // Individual cell selection is enabled
    
        // In SINGLE_SELECTION mode, the selected cell can be retrieved using
        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        int rowIndex = table.getSelectedRow();
        int colIndex = table.getSelectedColumn();
    
        // In the other modes, the set of selected cells can be retrieved using
        table.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        table.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
    
        // Get the min and max ranges of selected cells
        int rowIndexStart = table.getSelectedRow();
        int rowIndexEnd = table.getSelectionModel().getMaxSelectionIndex();
        int colIndexStart = table.getSelectedColumn();
        int colIndexEnd = table.getColumnModel().getSelectionModel()
            .getMaxSelectionIndex();
    
        // Check each cell in the range
        for (int r=rowIndexStart; r<=rowIndexEnd; r++) {
            for (int c=colIndexStart; c<=colIndexEnd; c++) {
                if (table.isCellSelected(r, c)) {
                    // cell is selected
                }
            }
        }
    }