Question

Need a simple Swing code to demonstrate how to add a button in a column of a Jtable using tablecellrenderer and tablecelleditor.

Answer 1

Add button to JTable

JTable table = new JTable(new JTableModel()); 
JScrollPane scrollPane = new JScrollPane(table);
table.setFillsViewportHeight(true); 
        
TableCellRenderer buttonRenderer = new JTableButtonRenderer();
table.getColumn("Button1").setCellRenderer(buttonRenderer);
table.getColumn("Button2").setCellRenderer(buttonRenderer);

Sample JTableModel, This is manage the columns and rows, Setting components

public static class JTableModel extends AbstractTableModel {
        private static final long serialVersionUID = 1L;
        private static final String[] COLUMN_NAMES = new String[] {"Id", "Stuff", "Button1", "Button2"};
        private static final Class<?>[] COLUMN_TYPES = new Class<?>[] {Integer.class, String.class, JButton.class,  JButton.class};
        
        @Override public int getColumnCount() {
            return COLUMN_NAMES.length;
        }

        @Override public int getRowCount() {
            return 4;
        }
        
        @Override public String getColumnName(int columnIndex) {
            return COLUMN_NAMES[columnIndex];
        }
        
        @Override public Class<?> getColumnClass(int columnIndex) {
            return COLUMN_TYPES[columnIndex];
        }

        @Override public Object getValueAt(final int rowIndex, final int columnIndex) {
            /*Adding components*/
            switch (columnIndex) {
                case 0: return rowIndex;
                case 1: return "Text for "+rowIndex;
                case 2: // fall through
               /*Adding button and creating click listener*/
                case 3: final JButton button = new JButton(COLUMN_NAMES[columnIndex]);
                        button.addActionListener(new ActionListener() {
                            public void actionPerformed(ActionEvent arg0) {
                                JOptionPane.showMessageDialog(JOptionPane.getFrameForComponent(button), 
                                        "Button clicked for row "+rowIndex);
                            }
                        });
                        return button;
                default: return "Error";
            }
        }   
    }

Sample Button click listener , This manage the when mouse is clicked over the component

private static class JTableButtonMouseListener extends MouseAdapter {
        private final JTable table;
        
        public JTableButtonMouseListener(JTable table) {
            this.table = table;
        }

        public void mouseClicked(MouseEvent e) {
            int column = table.getColumnModel().getColumnIndexAtX(e.getX()); // get the coloum of the button
            int row    = e.getY()/table.getRowHeight(); //get the row of the button

            /*Checking the row or column is valid or not*/
            if (row < table.getRowCount() && row >= 0 && column < table.getColumnCount() && column >= 0) {
                Object value = table.getValueAt(row, column);
                if (value instanceof JButton) {
                    /*perform a click event*/
                    ((JButton)value).doClick();
                }
            }
        }
    }

Sample JTable Cell Renderer, Managing the cell component

private static class JTableButtonRenderer implements TableCellRenderer {        
        @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            JButton button = (JButton)value;
            return button;  
        }
    }