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    <p>I try to understand what you did here:</p> <pre><code>panel1.add(label1); panel1.add(comboBox); panel1.add(label2); panel1.add(text); // &lt;--- JFrame frame=new JFrame("Area Calculator Window");//create a JFrame to put combobox frame.setLayout(new FlowLayout()); //set layout frame.add(panel1); frame.add(text); // &lt;--- </code></pre> <p>Especially <code>frame.add(text);</code> and <code>panel1.add(text);</code>. Don't add text to <code>JFrame</code>. Use <code>JPanel</code>. </p> <p>Further, </p> <pre><code>public class AreaFrame3 extends Frame </code></pre> <p>Use <code>public class AreaFrame3 extends JFrame</code> so you don't need create additional JFrame: </p> <pre><code>JFrame frame=new JFrame("Area Calculator Window"); </code></pre> <p>Something like:</p> <pre><code>super.setLayout(new FlowLayout()); //set layout super.add(panel1); super.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); super.pack(); //set JFrame ssize super.setSize(400,250); //make JFrame visible. So we can see it super.setVisible(true); </code></pre> <p>At last Ill give you some tamplate to start with (that will help you):</p> <pre><code>public class FrameExmpl extends JFrame{ private static final long serialVersionUID = 1L; private JTabbedPane tabbedPane; private JPanel topPanel; private JTextField txtf_loadDS_; public static int valueInt = 0; // responsible for Task status updating public static Boolean isFinish = false; public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException{ UIManager.setLookAndFeel( "com.sun.java.swing.plaf.windows.WindowsLookAndFeel" ); FrameExmpl UI_L = new FrameExmpl(); UI_L.buildGUI(); UI_L.setVisible(true); } public void buildGUI(){ addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { dispose(); } }); setSize(435, 225); setLocation(285, 105); setResizable(false); topPanel = new JPanel(); topPanel.setLayout(new BorderLayout()); getContentPane().add(topPanel); txtf_loadDS_ = new JTextField(); txtf_loadDS_.setBounds(22, 22, 382, 25); topPanel.add(txtf_loadDS_); finishBuildGUI(); } public void finishBuildGUI(){ tabbedPane = new JTabbedPane(); topPanel.add(tabbedPane, BorderLayout.CENTER); } } </code></pre> <p><img src="https://i.stack.imgur.com/rQaHE.png" alt="enter image description here"></p>
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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.

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