change the gui type and sperate one class to 3 more classes

src/Insomnia.java

+import java.awt.*;
 import java.io.IOException;
 
 public class Insomnia {
     public static void main(String [] args) throws IOException {
         InsomniaGUI insomniaGUI = new InsomniaGUI();
+        Frame frame = new Frame();
     }
 }

src/LeftPanel.java

+import javax.swing.*;
+import javax.swing.border.Border;
+import java.awt.*;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+
+public class LeftPanel extends JPanel {
+    Border border = BorderFactory.createLineBorder(Color.BLACK,3);
+    VerticalFlowLayout vfLayout = new VerticalFlowLayout();
+    JButton addRequest = new JButton("Add Request");
+    JMenu menu = new JMenu("Insomnia");
+    JPanel requestList = new JPanel(vfLayout);
+    JScrollPane scrollRequests = new JScrollPane(requestList);
+    JPanel up_left = new JPanel(new GridLayout(2,1));
+
+
+    //left panel (list of requests)
+    public void createLeftPanel() {
+        menu.setFont(new Font("Arial",20,15 ));
+        menu.setBorder(border);
+        menu.setPreferredSize(new Dimension(200,60));
+        up_left.add(menu);
+        up_left.add(addRequest);
+        up_left.setBackground(Color.GRAY);
+        requestList.setBackground(Color.GRAY);
+        addRequest.addMouseListener(new MouseListener() {
+            @Override
+            public void mouseClicked(MouseEvent e) {
+                int i = 1;
+                JLabel jLabel= new JLabel("request"+i);
+                requestList.add(jLabel);
+                i++;
+            }
+            @Override
+            public void mousePressed(MouseEvent e) {
+            }
+
+            @Override
+            public void mouseReleased(MouseEvent e) {
+
+            }
+
+            @Override
+            public void mouseEntered(MouseEvent e) {
+
+            }
+
+            @Override
+            public void mouseExited(MouseEvent e) {
+
+            }
+        });
+        this.setLayout(new BorderLayout());
+        this.setBackground(Color.GRAY);
+        this.add(up_left, BorderLayout.NORTH);
+        this.add(scrollRequests, BorderLayout.CENTER);
+        this.setBackground(Color.LIGHT_GRAY);
+    }
+
+    public JButton getAddRequest() {
+        return addRequest;
+    }
+
+    public JMenu getMenu() {
+        return menu;
+    }
+
+    public JPanel getRequestList() {
+        return requestList;
+    }
+
+    public JScrollPane getScrollRequests() {
+        return scrollRequests;
+    }
+
+    public JPanel getUp_left() {
+        return up_left;
+    }
+}

src/RequestPanel.java

+import javax.imageio.ImageIO;
+import javax.swing.*;
+import javax.swing.border.Border;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+
+public class RequestPanel extends JPanel {
+
+   private VerticalFlowLayout vfLayout = new VerticalFlowLayout();
+   private JPanel body = new JPanel();
+   private JPanel auth = new JPanel();
+   private JPanel query = new JPanel();
+   private JPanel mainCenterHeader = new JPanel(vfLayout);
+   private JScrollPane scrollPane_Header_Request = new JScrollPane(mainCenterHeader);
+    JPanel docs = new JPanel();
+    JTabbedPane tabbedPaneCenterRequest = new JTabbedPane();
+    JTextField headerField = new JTextField("header");
+    JTextField valueField = new JTextField("value");
+    JCheckBox checkBox = new JCheckBox();
+    JButton delete = new JButton();
+    JPanel rightOfHeader = new JPanel();
+    JPanel center_header = new JPanel(new GridLayout(1,2));
+    JPanel header = new JPanel(new BorderLayout());
+    String s []={"Patch","Put","Post","Delete","Get"};
+    JComboBox centerMenu = new JComboBox(s);
+    JTextField URLTextField = new JTextField("http://api.myproduct.com/v1/users");
+    JButton sendButton = new JButton("send");
+    JPanel centerUp = new JPanel(new BorderLayout());
+
+
+    public JTabbedPane tabbedPaneCenterRequest() throws IOException {
+        Border border = BorderFactory.createLineBorder(Color.BLACK,3);
+        BufferedImage master;
+        master = ImageIO.read(new File("C:\\Users\\Lenovo\\IdeaProjects\\Insomnia\\src\\image\\535246.png"));
+        Image scaled = master.getScaledInstance(20,20, java.awt.Image.SCALE_SMOOTH);
+        body.setBackground(Color.GRAY);
+        auth.setBackground(Color.GRAY);
+        query.setBackground(Color.GRAY);
+        mainCenterHeader.setBackground(Color.GRAY);
+        scrollPane_Header_Request.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
+        docs.setBackground(Color.GRAY);
+        //request-center
+        tabbedPaneCenterRequest.setBackground(Color.GRAY);
+        tabbedPaneCenterRequest.add("Body" , body);
+        tabbedPaneCenterRequest.add("Auth" , auth);
+        tabbedPaneCenterRequest.add("Query" , query);
+        tabbedPaneCenterRequest.add("Header" , scrollPane_Header_Request);
+        tabbedPaneCenterRequest.add("Docs" , docs);
+        headerField.addMouseListener(new MouseListener() {
+            @Override
+            public void mouseClicked(MouseEvent e) {
+                JTextField newHeaderField = new JTextField("header");
+                newHeaderField.setBorder(border);
+                JTextField newValueField = new JTextField("value");
+                newValueField.setBorder(border);
+                JCheckBox newCheckBox = new JCheckBox();
+                JButton newDelete = new JButton();
+                newDelete.setPreferredSize(new Dimension(20,20));
+                newDelete.setIcon(new ImageIcon(scaled));
+                JPanel newRightOfHeader = new JPanel();
+                newRightOfHeader.add(newCheckBox);
+                newRightOfHeader.add(newDelete);
+                JPanel new_center_header = new JPanel(new GridLayout(1, 2));
+                new_center_header.add(newHeaderField);
+                new_center_header.add(newValueField);
+                JPanel newHeader = new JPanel(new BorderLayout());
+                newHeader.add(newRightOfHeader, BorderLayout.EAST);
+                newHeader.add(new_center_header, BorderLayout.CENTER);
+                mainCenterHeader.add(newHeader );
+
+            }
+
+            @Override
+            public void mousePressed(MouseEvent e) {
+
+            }
+
+            @Override
+            public void mouseReleased(MouseEvent e) {
+
+            }
+
+            @Override
+            public void mouseEntered(MouseEvent e) {
+
+            }
+
+            @Override
+            public void mouseExited(MouseEvent e) {
+
+            }
+        });
+        RequestPanel.TextFieldHandler textFieldHandler = new TextFieldHandler(headerField,mainCenterHeader,border);//create a actionListener
+        headerField.setFocusable(true);
+        headerField.addActionListener( textFieldHandler);
+        headerField.setBorder(border);
+        valueField.setBorder(border);
+        delete.setIcon(new ImageIcon(scaled));
+        delete.setPreferredSize(new Dimension(20,20));
+        rightOfHeader.add(checkBox);
+        rightOfHeader.add(delete);
+        center_header.add(headerField);
+        center_header.add(valueField);
+        header.add(rightOfHeader,BorderLayout.EAST);
+        header.add(center_header,BorderLayout.CENTER);
+        mainCenterHeader.add(header);
+        return tabbedPaneCenterRequest;
+    }
+
+    //request_up
+    public JPanel centerUp(){
+
+        centerMenu.setFont(new Font("Arial",20,15 ));
+        centerUp.add(centerMenu , BorderLayout.WEST);
+        centerUp.add(URLTextField , BorderLayout.CENTER);
+        centerUp.add(sendButton , BorderLayout.EAST);
+        return centerUp;
+    }
+
+    class TextFieldHandler implements ActionListener {
+        JTextField headerField ;
+        JPanel mainCenterHeader;
+        Border border;
+        private TextFieldHandler(JTextField headerField , JPanel mainCenterHeader , Border border){
+            this.headerField = headerField;
+            this.mainCenterHeader = mainCenterHeader;
+            this.border = border;
+        }
+        @Override
+        public void actionPerformed(ActionEvent e) {
+            System.out.println("++++++++++++");
+            if (!headerField.getText().equals("") ) {
+                JTextField newHeaderField = new JTextField("header");
+                newHeaderField.setBorder(border);
+                JTextField newValueField = new JTextField("value");
+                newValueField.setBorder(border);
+                JCheckBox newCheckBox = new JCheckBox();
+                JButton newDelete = new JButton(new ImageIcon("C:\\Users\\Lenovo\\IdeaProjects\\Insomnia\\src\\image\\1000582.png"));
+                JPanel newRightOfHeader = new JPanel();
+                newRightOfHeader.add(newCheckBox);
+                newRightOfHeader.add(newDelete);
+                JPanel new_center_header = new JPanel(new GridLayout(1, 2));
+                new_center_header.add(newHeaderField);
+                new_center_header.add(newValueField);
+                JPanel newHeader = new JPanel(new BorderLayout());
+                newHeader.add(newRightOfHeader, BorderLayout.EAST);
+                newHeader.add(new_center_header, BorderLayout.CENTER);
+                mainCenterHeader.add(newHeader);
+            }
+        }
+    }
+
+    public void createRequestPanel() throws IOException {
+        addToMainRequestPanel(centerUp() , tabbedPaneCenterRequest());
+    }
+
+    public void addToMainRequestPanel(JPanel centerUp ,JTabbedPane tabbedPaneCenterRequest ){
+        this.setLayout(new BorderLayout());
+        this.add(centerUp,BorderLayout.NORTH);
+        this.add(tabbedPaneCenterRequest , BorderLayout.CENTER);
+    }
+
+
+    public JPanel getRightOfHeader() {
+        return rightOfHeader;
+    }
+
+    public JPanel getCenter_header() {
+        return center_header;
+    }
+
+    public JPanel getBody() {
+        return body;
+    }
+
+    public JPanel getAuth() {
+        return auth;
+    }
+
+    public JPanel getQuery() {
+        return query;
+    }
+
+    public JPanel getMainCenterHeader() {
+        return mainCenterHeader;
+    }
+
+    public JScrollPane getScrollPane_Header_Request() {
+        return scrollPane_Header_Request;
+    }
+
+    public JPanel getDocs() {
+        return docs;
+    }
+
+    public JTabbedPane getTabbedPaneCenterRequest() {
+        return tabbedPaneCenterRequest;
+    }
+
+    public JPanel getHeader() {
+        return header;
+    }
+
+    public JComboBox getCenterMenu() {
+        return centerMenu;
+    }
+
+    public JPanel getCenterUp() {
+        return centerUp;
+    }
+}

src/RespondPanel.java

+import javax.swing.*;
+import javax.swing.border.Border;
+import java.awt.*;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+
+public class RespondPanel extends JPanel {
+   private Border border = BorderFactory.createLineBorder(Color.BLACK,3);
+   private VerticalFlowLayout vfLayout = new VerticalFlowLayout();
+   private JPanel row = new JPanel();
+   private JTextArea massageBody = new JTextArea();
+   private JPanel mainCenterHeader_respond = new JPanel(vfLayout);
+   private JScrollPane scrollPane_Header_Respond = new JScrollPane(mainCenterHeader_respond);
+   private JPanel header_MainPanel = new JPanel(new BorderLayout());
+   private JButton copyToClipBoard = new JButton("copy to clip board");
+   private JPanel cookie = new JPanel();
+   private JPanel timeline = new JPanel(new BorderLayout());
+   private JTabbedPane tabbedPaneCenterResponse = new JTabbedPane();
+   private JTextField headerField2 = new JTextField("header");
+
+    public JTabbedPane tabbedPaneCenterResponse() {
+        massageBody.setPreferredSize(new Dimension(200, 300));
+        row.add(massageBody);
+        row.setBackground(Color.GRAY);
+        scrollPane_Header_Respond.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
+        mainCenterHeader_respond.setBackground(Color.GRAY);
+        header_MainPanel.setBackground(Color.GRAY);
+        header_MainPanel.add(scrollPane_Header_Respond, BorderLayout.CENTER);
+        header_MainPanel.add(copyToClipBoard, BorderLayout.SOUTH);
+        cookie.setBackground(Color.GRAY);
+        timeline.setBackground(Color.GRAY);
+        tabbedPaneCenterResponse.setBackground(Color.GRAY);
+        tabbedPaneCenterResponse.add("Row", row);
+        tabbedPaneCenterResponse.add("Header", header_MainPanel);
+        tabbedPaneCenterResponse.add("Cookie", cookie);
+        tabbedPaneCenterResponse.add("Timeline", timeline);
+
+        headerField2.setEditable(false);
+        headerField2.addMouseListener(new MouseListener() {
+            @Override
+            public void mouseClicked(MouseEvent e) {
+                System.out.println(")))))))))))");
+                // if (!headerField2.getText().equals("") ) {
+                JTextField newHeaderField = new JTextField("header");
+                newHeaderField.setEditable(false);
+                newHeaderField.setBorder(border);
+                JTextField newValueField = new JTextField("value");
+                newValueField.setEditable(false);
+                newValueField.setBorder(border);
+                JPanel new_center_header = new JPanel(new GridLayout(1, 2));
+                new_center_header.add(newHeaderField);
+                new_center_header.add(newValueField);
+                JPanel newHeader = new JPanel(new BorderLayout());
+                newHeader.add(new_center_header, BorderLayout.CENTER);
+                mainCenterHeader_respond.add(newHeader);
+                //   }
+            }
+
+            @Override
+            public void mousePressed(MouseEvent e) {
+
+            }
+
+            @Override
+            public void mouseReleased(MouseEvent e) {
+
+            }
+
+            @Override
+            public void mouseEntered(MouseEvent e) {
+
+            }
+
+            @Override
+            public void mouseExited(MouseEvent e) {
+            }
+        });
+        headerField2.setBorder(border);
+        JTextField valueField2 = new JTextField("value");
+        valueField2.setEditable(false);
+        valueField2.setBorder(border);
+        JPanel center_header2 = new JPanel(new GridLayout(1, 2));
+        center_header2.add(headerField2);
+        center_header2.add(valueField2);
+        JPanel header2 = new JPanel(new BorderLayout());
+        header2.add(center_header2, BorderLayout.CENTER);
+        mainCenterHeader_respond.add(header2);
+        return tabbedPaneCenterResponse;
+    }
+    public JPanel up_response() {
+
+        JPanel up_response = new JPanel();
+        JLabel label1 = new JLabel("ok");
+        label1.setBorder(border);
+        JLabel label2 = new JLabel("s");
+        label2.setBorder(border);
+        JLabel label3 = new JLabel("KB");
+        label3.setBorder(border);
+        up_response.add(label1);
+        up_response.add(label2);
+        up_response.add(label3);
+        return up_response;
+    }
+    public void createRespondPanel(){
+        addToMainRespondPanel(tabbedPaneCenterResponse() , up_response());
+    }
+    public void addToMainRespondPanel(JTabbedPane tabbedPaneCenterResponse, JPanel up_response){
+        this.setLayout(new BorderLayout());
+        this.add(tabbedPaneCenterResponse , BorderLayout.CENTER);
+        this.add(up_response,BorderLayout.NORTH);
+    }
+
+
+
+    public JTextArea getMassageBody() {
+        return massageBody;
+    }
+
+    public JPanel getMainCenterHeader_respond() {
+        return mainCenterHeader_respond;
+    }
+
+
+    public JScrollPane getScrollPane_Header_Respond() {
+        return scrollPane_Header_Respond;
+    }
+
+    public JPanel getHeader_MainPanel() {
+        return header_MainPanel;
+    }
+
+    public JButton getCopyToClipBoard() {
+        return copyToClipBoard;
+    }
+
+    public JPanel getCookie() {
+        return cookie;
+    }
+
+    public JPanel getTimeline() {
+        return timeline;
+    }
+
+    public JTabbedPane getTabbedPaneCenterResponse() {
+        return tabbedPaneCenterResponse;
+    }
+
+
+    public JTextField getHeaderField2() {
+        return headerField2;
+    }
+
+    public JPanel getRow() {
+        return row;
+    }
+}