Failed to set column width to zero, i.e. do not make the column invisible

Question

I am trying to make one column from JTable invisible by setting the width to zero, but this could not happen and it will remain visible for width = 15. Here is the code -

 public void restoreColumnWithWidth(int column, int width) { try { TableColumn tableColumn = table.getColumnModel().getColumn(column); table.getTableHeader().setResizingColumn(tableColumn); tableColumn.setWidth(width); tableColumn.setMaxWidth(width); tableColumn.setMinWidth(width); tableColumn.setPreferredWidth(width); } catch (Exception ex) { } } 

What is wrong with the code?

Answer 1

• no, never remove the TableColumn from the TableModel , this is the wrong sentence, and not use the built-in JTable # removeColumn (TableColumn aColumn)

• notice, this method only removes the column from the view, is still present in the remote column of the model, and you can return that visible remote column using JTable # addColumn (TableColumn aColumn)

EDIT

 import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Stack; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.WindowConstants; import javax.swing.table.DefaultTableModel; import javax.swing.table.TableColumn; import javax.swing.table.TableColumnModel; public class TableRowHeight { private static final long serialVersionUID = 1L; private JFrame frame = new JFrame("p*s*s*s*s*t*t"); private String[] columnNames = {"one", "two", "Playing with", "four", "five",}; private String[][] data = { {"aaaaaa", "bbbbbb", "cccccc", "dddddd", "eeeeeee",}, {"bbbbbb", "cccccc", "dddddd", "eeeeeee", "aaaaaa",}, {"cccccc", "dddddd", "eeeeeee", "aaaaaa", "bbbbbb",}, {"dddddd", "eeeeeee", "aaaaaa", "bbbbbb", "cccccc",}, {"eeeeeee", "aaaaaa", "bbbbbb", "cccccc", "dddddd",}}; private JTable table = new JTable(new DefaultTableModel(data, columnNames)); private TableColumnModel tcm = table.getColumnModel(); private Stack<TableColumn> colDeleted = new Stack<TableColumn>(); private JButton restoreButton = new JButton("Restore Column Size"); private JButton hideButton = new JButton("Set Column Size to Zero"); private JButton deleteButton = new JButton("Delete Column"); private JButton addButton = new JButton("Restore Column"); public TableRowHeight() { table.setRowMargin(4); table.setRowHeight(30); table.setFont(new Font("SansSerif", Font.BOLD + Font.PLAIN, 20)); JScrollPane scrollPane = new JScrollPane(table); for (int i = 0; i < (tcm.getColumnCount()); i++) { tcm.getColumn(i).setPreferredWidth(100); } table.setPreferredScrollableViewportSize(table.getPreferredSize()); restoreButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { tcm.getColumn(2).setPreferredWidth(100); } }); hideButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { tcm.getColumn(2).setPreferredWidth(000); } }); deleteButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (table.getColumnCount() > 0) { TableColumn colToDelete = table.getColumnModel().getColumn(table.getColumnCount() - 1); table.removeColumn(colToDelete); table.validate(); colDeleted.push(colToDelete); addButton.setEnabled(true); } else { deleteButton.setEnabled(false); } } }); addButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (colDeleted.size() > 0) { table.addColumn(colDeleted.pop()); table.validate(); deleteButton.setEnabled(true); } else { addButton.setEnabled(false); } } }); JPanel btnPanel = new JPanel(); btnPanel.add(hideButton); btnPanel.add(restoreButton); btnPanel.add(deleteButton); btnPanel.add(addButton); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); frame.add(scrollPane, BorderLayout.CENTER); frame.add(btnPanel, BorderLayout.SOUTH); frame.pack(); frame.setLocation(150, 150); frame.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { TableRowHeight frame = new TableRowHeight(); } }); } } 

EDIT2

you need to check also

 JTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); JTable.getTableHeader().setReorderingAllowed(false); 

Answer 2

If it should be deleted, and not just hidden: delete it from the model table. If it only needs to be hidden and then shown, you can remove the TableColumn from the TableColumnModel

Creating a column height of 0 is a bit dummy.