Question

column header not visible in my JTable i have created a JPanel and added the JTable to the JPanel.

Object rowData[][] = { { "Row1-Column1", "Row1-Column2", "Row1-Column3"},
                { "Row2-Column1", "Row2-Column2", "Row2-Column3"} };
            Object columnNames[] = { "Column One", "Column Two", "Column Three"};
            JTable jTable = new JTable(rowData, columnNames); 

Answer 1

The API for JTable states:

“Note that if you wish to use a JTable in a standalone view (outside
of a JScrollPane) and want the header displayed, you can get it using
getTableHeader() and display it separately.”

Or just add the table to a scrollpane, and add your scrollpane to the panel…