根据数据库的值改变 JTable 行的颜色

Question

tblApplicant = new javax.swing.JTable(){
    public Component prepareRenderer(TableCellRenderer renderer, int row, int column)
    {
    Component c = super.prepareRenderer(renderer, row, column);

    //  Alternate row color
    String value = (String) tblApplicant.getValueAt(row, 4);
    if (value == "Single" && !isRowSelected(row))
    c.setBackground(Color.LIGHT_GRAY);

    return c;
}

};

This is my New Codes im trying to get the value of column 4 and equal it to single if its true the background is change. but this is not working

Answer 1

Overriding the prepareRender(...) method of the JTable allows your to customize rendering for the entire row based on a value in one of the columns.

The basic logic would be something like:

public Component prepareRenderer(TableCellRenderer renderer, int row, int column)
{
    Component c = super.prepareRenderer(renderer, row, column);

    //  Color row based on a cell value

    if (!isRowSelected(row))
    {
        c.setBackground(getBackground()); // set default background

        int modelRow = convertRowIndexToModel(row);
        String value = (String)getModel().getValueAt(modelRow, ???);

        if ("Single".equals(value)) c.setBackground(Color.GREEN);
    }

    return c;
}

Check outTable Row Rendering for more information and working examples.