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    <p>Your solution seems awfully complicated for something that looks quite simple. You actually only have two different CellEditor which are both based on a JComboBox.</p> <p>So, a simpler solution would be to extend <code>DefaultCellEditor</code> with a <code>JComboBox</code> and override getTableCellEditorComponent(), depending on which row you are on, you update the <code>JComboBox</code> with the appropriate model and you return the call to <code>super</code>.</p> <p>Eventually, you set this cell editor on all your columns of the table.</p> <p><em>Also consider following Java coding conventions (variables and methods starts with a lower case letter, classes starts with an upper case letter, etc...)</em></p> <p>EDIT:</p> <pre><code> class MyTableCellEditor extends DefaultCellEditor { private DefaultCellEditor defaultEditor; private DefaultComboBoxModel nudaModel = new DefaultComboBoxModel(new String[] { "N", "U", "D", "A" }); private DefaultComboBoxModel nahxpModel = new DefaultComboBoxModel(new String[] { "N", "A", "H", "X", "P" }); public MyTableCellEditor() { super(new JComboBox()); defaultEditor = new DefaultCellEditor(new JTextField()); } private JComboBox getComboBox() { return (JComboBox) editorComponent; } @Override public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { Membership top = _Memberships.get(column); Membership side = _Memberships.get(row); if (side.getId() == top.getId() &amp;&amp; side.isEft() &amp;&amp; top.isEft()) { return defaultEditor.getTableCellEditorComponent(table, value, isSelected, row, column); } else if (side.getId() != top.getId() &amp;&amp; side.isEft() &amp;&amp; top.isEft()) { getComboBox().setModel(nudaModel); } else { getComboBox().setModel(nahxpModel); } return super.getTableCellEditorComponent(table, NUHPADX(side.getId(), top.getId()), isSelected, row, column); } } </code></pre> <p>And here is implementation of what your TableModel could look like:</p> <pre><code> class MyDataModel extends AbstractTableModel{ @Override public int getRowCount() { return _Memberships.size(); } @Override public int getColumnCount() { return _Memberships.size(); } @Override public String getColumnName(int column) { // Here feel free to return the appropriate column names. return super.getColumnName(column); } @Override public Object getValueAt(int row, int column) { return NUHPADX(_Memberships.get(row).getId(), _Memberships.get(column).getId()); } @Override public boolean isCellEditable(int rowIndex, int columnIndex) { // Here you can do whatever you want to say that is editable or not // If it is editable, you need to override setValueAt return true; } @Override public void setValueAt(Object aValue, int rowIndex, int columnIndex) { // Here you need to implement the update of your model } } </code></pre>
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    1. USGuillaume Polet
    1. USGuillaume Polet
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    1. COIf you have a example of that I would be willing to give it try. As for the Conventions I actually have my own style i like to follow by. It's actually pretty rare that I post this much code for a problem.
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      1. USPyromanci
    2. CO@ Guillaume Polet and I want to better and free TableModel where you can (to be able without restrictions) to put random Objects type to the random Jtables Columns & Rows
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    3. CO@Pyromanci I updated my answer with an example TableCellEditor that could replace all your complex code and as a bonus, I provided you with an implementation of the TableModel which I believe will be a lot simpler to maintain and update. For these classes to work, they need to have access (one way or another) to the _Membership variable (either by making it final and declare my two classes inline, or by passing an argument, or by making the two classes inner-classes and make _Membership a class variable, etc...). For the convention, I would seriously consider switching to the Java ones!
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