Remove record in database from Jtable?

Question

I want to delete row in databse, but don't know how to add field to primary key Jtable like hidden field,
Can you show me or any difference way to solve this?

Answer 1

There are two ways to hide a column (that I know of):
1) Set the columns widths to 0. I don't like this approach because because the 'hidden' column still requires a tab.
2) Remove the TableColumn from the TableColumnModel. This is my preferred approach.
Here is a simple example using both approaches, You determine which approach you like best:
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableColumnHide extends JFrame
     public TableColumnHide()
          String[] columnNames = {"Identifier", "Student#", "Student Name", "Gender", "Grade", "Average"};
          Object[][] data =
               {new Integer(1), "Bob",   "M", "A", new Double(85.5) },
               {new Integer(2), "Carol", "F", "B", new Double(77.7) },
               {new Integer(3), "Ted",   "M", "C", new Double(66.6) },
               {new Integer(4), "Alice", "F", "D", new Double(55.5) }
          DefaultTableModel model = new DefaultTableModel(data, columnNames);
          //  Hide column by setting minimum width
          JTable table1 = new JTable(model);
          table1.getColumnModel().getColumn(0).setMinWidth(0);
          table1.getColumnModel().getColumn(0).setPreferredWidth(0);
          table1.setPreferredScrollableViewportSize(table1.getPreferredSize());
          JScrollPane scrollPane1= new JScrollPane( table1 );
          getContentPane().add( scrollPane1, BorderLayout.WEST );
          //  Remove columns from TableColumnModel
          JTable table2 = new JTable(model);
          TableColumnModel columnModel2 = table2.getColumnModel();
          columnModel2.removeColumn( columnModel2.getColumn( 0 ) );
          table2.setPreferredScrollableViewportSize(table2.getPreferredSize());
          JScrollPane scrollPane2 = new JScrollPane( table2 );
          getContentPane().add( scrollPane2, BorderLayout.EAST );
          JPanel north = new JPanel( new GridLayout(1, 2) );
          north.add( new JLabel("Width = 0") );
          north.add( new JLabel("Remove Table Column") );
          getContentPane().add(north, BorderLayout.NORTH );
     public static void main(String[] args)
          TableColumnHide frame = new TableColumnHide();
          frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
          frame.pack();
          frame.setVisible(true);
}Since we 'hid' the first column, try tabbing from the last column to the first. Notice which approach requires 2 tabs before the appropriate cell gets highlighted.