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    <p>Use <code>JPanel</code> with <a href="http://docs.oracle.com/javase/6/docs/api/java/awt/GridLayout.html" rel="nofollow">GridLayout</a> as the cell renderer:</p> <pre><code>public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus,int row,int col) { if (isSplitted(value) { JPanel panel = new JPanel(new GridLayout(1,2)); JLabel left = new JLabel(getLeft(value)); JLabel right = new JLabel(getRight(value)); panel.add(left); panel.add(right); return panel; } else { return super.getTableCellRendererComponent( table, value, isSelected, hasFocus, row, col) } } </code></pre> <p>Here <code>getLeft</code>, <code>getRight</code> and <code>isSplitted</code> are up to you to define for the value you render in that cell.</p> <p>If makes sense, you can also optimize retaining an instance of this panel with the two labels; it is possible to reuse it on every call upon setting the required content. For the case when left and rights components are very different in size, BorderLayout may work better.</p> <p>Similarly, you can provide the cell editor, just you need <code>JTextField</code> or the like as <code>JLabel</code> is not editable. Derive from <a href="http://docs.oracle.com/javase/1.5.0/docs/api/javax/swing/AbstractCellEditor.html" rel="nofollow">AbstractCellEditor</a>, overriding <code>getCellEditorValue</code> (return the value composed from the panel) and <code>getTableCellEditorComponent</code> (return the panel itself after setting the fields to the current value).</p> <p><strong>@Stifler</strong> has commented on my answer:</p> <pre><code>public Component getTableCellRendererComponent(JTable table, Object obj, boolean isSelected, boolean hasFocus, int row, int column) { Component cell = super.getTableCellRendererComponent( table, obj, isSelected, hasFocus, row, column); JPanel panel = new JPanel(new GridLayout(1, 2)); if ("History".equals(obj)) { JTextField left = new JTextField("Left"); left.setEditable(true); JTextField right = new JTextField("Right"); left.setEditable(true); panel.add(left); panel.add(right); return panel; } return cell; } </code></pre>
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    1. COi m having the following table
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    2. COi also put the splitting code into the TableCellRenderer but now when i am going to edit the newly added Left/Right JTextField, its editing previous value.
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    3. COpublic Component getTableCellRendererComponent( JTable table, Object obj, boolean isSelected, boolean hasFocus, int row, int column ) { Component cell = super.getTableCellRendererComponent( table, obj, isSelected, hasFocus, row, column ); JPanel panel = new JPanel( new GridLayout( 1, 2 ) ); if( "History".equals( obj ) ) { JTextField left = new JTextField( "Left" ); left.setEditable( true ); JTextField right = new JTextField( "Right" ); left.setEditable( true ); panel.add( left ); panel.add( right ); return panel; } return cell; }
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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