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    <p>You have to prepare this JPanels as Object and put that to the Map or List, simple example based on great but simple idea</p> <p><img src="https://i.stack.imgur.com/Uuvwx.jpg" alt="enter image description here"><img src="https://i.stack.imgur.com/5FwvO.jpg" alt="enter image description here"><img src="https://i.stack.imgur.com/9g2cZ.jpg" alt="enter image description here"></p> <pre><code>import java.awt.*; import java.awt.event.*; import java.util.ArrayList; import java.util.List; import javax.swing.*; import javax.swing.border.LineBorder; //based on @trashgod code from http://stackoverflow.com/a/7706684/714968 public class FocusingPanel extends JFrame { private static final long serialVersionUID = 1L; private int elements = 10; private List&lt;GridPanel&gt; list = new ArrayList&lt;GridPanel&gt;(); private final JFrame mainFrame = new JFrame(); private final JPanel fatherPanel = new JPanel(); public FocusingPanel() { fatherPanel.setLayout(new GridLayout(elements, elements)); for (int i = 0; i &lt; elements * elements; i++) { int row = i / elements; int col = i % elements; GridPanel gb = new GridPanel(row, col); list.add(gb); fatherPanel.add(gb); } mainFrame.setLayout(new BorderLayout(5, 5)); mainFrame.setDefaultCloseOperation(EXIT_ON_CLOSE); mainFrame.add(fatherPanel, BorderLayout.CENTER); mainFrame.pack(); mainFrame.setVisible(true); } private GridPanel getGridPanel(int r, int c) { int index = r * elements + c; return list.get(index); } private class GridPanel extends JPanel { private int row; private int col; @Override public Dimension getPreferredSize() { return new Dimension(20, 20); } public GridPanel(int row, int col) { this.row = row; this.col = col; this.setBackground(Color.red); this.setBorder(new LineBorder(Color.black,1)); this.addMouseListener(new MouseListener() { @Override public void mouseClicked(MouseEvent e) { int r = GridPanel.this.row; int c = GridPanel.this.col; GridPanel gb = FocusingPanel.this.getGridPanel(r, c); System.out.println("r" + r + ",c" + c + " " + (GridPanel.this == gb) + " " + (GridPanel.this.equals(gb))); } @Override public void mousePressed(MouseEvent e) { } @Override public void mouseReleased(MouseEvent e) { } @Override public void mouseEntered(MouseEvent e) { int r = GridPanel.this.row; int c = GridPanel.this.col; GridPanel gb = FocusingPanel.this.getGridPanel(r, c); System.out.println("r" + r + ",c" + c + " " + (GridPanel.this == gb) + " " + (GridPanel.this.equals(gb))); setBackground(Color.blue); } @Override public void mouseExited(MouseEvent e) { setBackground(Color.red); } }); } } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { FocusingPanel focusingPanel = new FocusingPanel(); } }); } } </code></pre>
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    1. POjava swing associating JPanel with row col values for mouse listener
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    1. COWhy is this better than a Jtable? I actually believe it is a waste of ressources. Because your GridPanel contains a row and a column which is an exact duplicate of a Jtable behavior
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    2. COWhat I mean is that you're mimicking a Jtable when it already exist in Java. So why reinvent the wheel?
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    3. CO1) you are right for simple JPanel in the JTable's cell, but in case that JPanel nested another JComponents or Graphics, then required SwingUtilities, 2) JTable knows return Rectangle or cell from MouseEvent,
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A row detail

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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