The Java Developers Almanac 1.4


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Home > List of Packages > javax.swing.table  [62 examples] > Editing  [8 examples]

e956. Programmatically Starting and Stopping Cell Editing in a JTable Component

Normally, the table component automatically starts and stops the editing of table cells based on user input. However, when building table commands, it may be necessary to programmatically enable and disable editing of cells. The following code demonstrates how to set a cell in edit mode:
    // Create table
    int rows = 10;
    int cols = 5;
    JTable table = new JTable(rows, cols);
    
    // Enable the ability to select a single cell
    table.setColumnSelectionAllowed(true);
    table.setRowSelectionAllowed(true);
    
    // Set the cell on the 2nd row, 4th column in edit mode
    int row = 1;
    int col = 3;
    boolean success = table.editCellAt(row, col);
    if (success) {
        // Select cell
        boolean toggle = false;
        boolean extend = false;
        table.changeSelection(row, col, toggle, extend);
    } else {
        // Cell could not be edited
    }
The following code saves the current value in the cell being edited and stops the editing process:
    if (table.getCellEditor() != null) {
        table.getCellEditor().stopCellEditing();
    }
The following code discards any changes made by the user and stops the editing process:
    if (table.getCellEditor() != null) {
        table.getCellEditor().cancelCellEditing();
    }

 Related Examples
e953. Creating a Custom Table Cell Editor in a JTable Component
e954. Preventing Invalid Values in a Cell in a JTable Component
e955. Setting the Activation Click Count for a Table Cell Editor in a JTable Component
e957. Creating a Text Field That Mirrors the Value in the Anchor Cell in a JTable Component
e958. Disabling User Edits in a JTable Component
e959. Using a JComboBox in a Cell in a JTable Component
e960. Using a List JSpinner as a Cell Editor in a JTable Component

See also: Cells    Column Heads    Columns    Events    Layout    Rows    Scrolling    Selection    Sorting    Table Model    Tool Tips   


© 2002 Addison-Wesley.