Resize panels in a frame

Hi, I tried searching through the forums, but am obviously using the wrong search words.
I have a JFrame with a JPanel in it. The JPanel is using the following layout:
new BoxLayout (parentPanel, BoxLayout.LINE_AXIS)
Then I added two JPanels to the parentPanel.
But then I would like to click and drag the separator between the two panels to change the size of the two JPanels.
Any hints?
Thanks,
Novice

As it turns out I should have been looking at the JSplitPane class.
Novice

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Hello to all,
I have the following question, how is it possible to make resizable the panels contained in the frame when frame's resized by the user?
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Can anybody help me?
I attach here bellow my code
Thansk in advance
Mandy
ublic class SecondClass extends JFrame{
     JTextArea cfgArea;
     JTextArea relArea;
     JTextArea resultArea;
     JComboBox searchModeCB;
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         addCfgButton.setBounds(200, 230, 60, 20);
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         relArea.setTransferHandler(new CustomedTransferHandler());
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         addRelButton.setBounds(110, 230, 60, 20);
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         saveResultButton.setBounds(380, 520, 80, 20);
         resultPane.add(saveResultButton);
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         exitButton.setBounds(495, 550, 80, 15);
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         frame.setLocation(200,200);
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         int height = 650;
         frame.setSize(width, height);
         frame.setVisible(true);
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          SecondClass main = new SecondClass();
}

ok did some modifications.
Now it works as I want
     public SecondClass(){
         JFrame frame = new JFrame("title");
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setResizable(true);
         JPanel mainPanel = new JPanel ();
         mainPanel.setSize(600,400);
         mainPanel.setLayout(new GridLayout(0,2));
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         sxPanel.setBackground(Color.blue);
         sxPanel.setLayout(new GridLayout(2,0));
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         JPanel dxPanel = new JPanel();
         dxPanel.setLayout(new BorderLayout());
         mainPanel.add(dxPanel);
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          JPanel cfgPane = new JPanel ();
          cfgPane.setLayout(new BorderLayout());
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         cfgPane.add(new JLabel(" "),BorderLayout.EAST);
         cfgPane.add(new JLabel(" "),BorderLayout.WEST);
         cfgArea = new JTextArea();
         cfgArea.setBorder(BorderFactory.createEtchedBorder());
         cfgArea.setDragEnabled(true);
         cfgArea.setTransferHandler(new CustomedTransferHandler());
         cfgArea.setDropMode(DropMode.INSERT);
         JScrollPane cfgScrollPane = new JScrollPane(cfgArea);
         cfgPane.add(cfgScrollPane,BorderLayout.CENTER);
         JPanel southCfgPanel = new JPanel();
         cfgPane.add(southCfgPanel, BorderLayout.SOUTH);
         JButton clearCfgButton = new JButton("Clear");
         southCfgPanel.add(clearCfgButton);
         JButton addCfgButton = new JButton("Add");
         southCfgPanel.add(addCfgButton);
         //end og cfg Area
         // Create relArea
         JPanel relPane = new JPanel();
         relPane.setLayout(new BorderLayout());
         sxPanel.add(relPane);
         relPane.add(new JLabel(" "),BorderLayout.NORTH);
         relPane.add(new JLabel(" "),BorderLayout.EAST);
         relPane.add(new JLabel(" "),BorderLayout.WEST);
         relArea = new JTextArea();
         relArea.setBorder(BorderFactory.createEtchedBorder());
         relArea.setDragEnabled(true);
         relArea.setTransferHandler(new CustomedTransferHandler());
         relArea.setDropMode(DropMode.INSERT);
         JScrollPane relScrollPane = new JScrollPane(relArea);
         relPane.add(relScrollPane,BorderLayout.CENTER);
         JPanel southRelPanel = new JPanel();
         relPane.add(southRelPanel, BorderLayout.SOUTH);
         JButton clearRelButton = new JButton("Clear");
         southRelPanel.add(clearRelButton);
         JButton addRelButton = new JButton("Add");
         southRelPanel.add(addRelButton);
         String[] items = {"Something"};
         searchModeCB = new JComboBox(items);
         searchModeCB.setSelectedItem("Something");
         southRelPanel.add(searchModeCB);
         JButton okRelButton = new JButton("Ok");
         southRelPanel.add(okRelButton);
        //RESULT PANEL
         JPanel resultPane = new JPanel();
         resultPane.setLayout(new BorderLayout());
         dxPanel.add(new JLabel(" "),BorderLayout.NORTH);
         dxPanel.add(new JLabel(" "),BorderLayout.EAST);
         dxPanel.add(new JLabel(" "),BorderLayout.WEST);
         dxPanel.add(resultPane,BorderLayout.CENTER);
         resultArea = new JTextArea();
         resultArea.setBorder(BorderFactory.createEtchedBorder());
         resultPane.add(resultArea,BorderLayout.CENTER);
         JScrollPane resultScrollPane = new JScrollPane(resultArea);
         resultPane.add(resultScrollPane);
         JPanel southPanel = new JPanel();
         resultPane.add(southPanel, BorderLayout.SOUTH);
         JButton clearResButton = new JButton("Clear");
         southPanel.add(clearResButton);
         JButton saveResultButton = new JButton("Save");
         southPanel.add(saveResultButton);
         JButton exitButton = new JButton("Exit");
         southPanel.add(exitButton);
         frame.add(mainPanel);
         frame.setLocation(200,200);
         // Show the frame
         int width = 980;
         int height = 650;
         frame.setSize(width, height);
         frame.setVisible(true);
     }

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Resize panels in a frame

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