title: how to add full image in JDialog this dialog is created by JOptionPane
body: <p>my question is i want to add full background image if <code>JDialog</code>, this <code>JDialog</code> is created by <code>JOptionPane</code>. This image does not cover full <code>Dialog</code>.</p>
  
  <p>If you have any solution please let me know.</p>
  
  <pre><code>public class BrowseFilePath {
  
      public static final String DIALOG_NAME = "what-dialog";
      public static final String PANE_NAME = "what-pane";
      private static JDialog loginRegister;
      private static String path;
      private static JPanel Browse_panel = new JPanel(new BorderLayout());
      private static JLabel pathLbl = new JLabel("Please Choose Folder / File");  
      private static JTextField regtxt_file = new JTextField(30);
  
      private static JButton browse_btn = new JButton("Browse");
      private static JButton ok_btn = new JButton("Ok");
      private static JButton close_btn = new JButton("Cancel");
  
      /*public static void main(String [] arg){
          showFileDialog();
      }*/
      public static void showFileDialog() {
  
          JOptionPane.setDefaultLocale(null);
          JOptionPane pane = new JOptionPane(createRegInputComponent());
          pane.setName(PANE_NAME);
          loginRegister = pane.createDialog("ShareBLU");
         /* try {
          loginRegister.setContentPane(new JLabel(new ImageIcon(ImageIO.read(AlertWindow.getBgImgFilePath()))));
          } catch (IOException e) {
              e.printStackTrace();
          }*/
  
          loginRegister.setName(DIALOG_NAME);
          loginRegister.setSize(380,150);
          loginRegister.setVisible(true);
          if(pane.getInputValue().equals("Ok")){
              String getTxt = regtxt_file.getText();
              BrowseFilePath.setPath(getTxt);
          }
          else if(pane.getInputValue().equals("Cancel")){
              regtxt_file.setText("");
              System.out.println("Pressed Cancel Button =======********=");
              System.exit(0);
          }
      }
      public static String getPath() {
          return path;
      }
  
  
      public static void setPath(String path) {
          BrowseFilePath.path = path;
      }
  
  
      private static JComponent createRegInputComponent() {
          Browse_panel = new JBackgroundPanel();
  
          Browse_panel.setLayout(new BorderLayout());
  
          Box rows = Box.createVerticalBox();
           Browse_panel.setBounds(0,0,380,150);
  
           Browse_panel.add(pathLbl);
           pathLbl.setForeground(Color.white);
           pathLbl.setBounds(20, 20, 200, 20);
  
           Browse_panel.add(regtxt_file);
           regtxt_file.setToolTipText("Select File/Folder..");
           regtxt_file.setBounds(20, 40, 220, 20);
           Browse_panel.add(browse_btn);
           browse_btn.setToolTipText("Browse");
           browse_btn.setBounds(250, 40, 90, 20);
           Browse_panel.add(ok_btn);
           ok_btn.setToolTipText("Ok");
           ok_btn.setBounds(40, 75, 80, 20);
           Browse_panel.add(close_btn);
           close_btn.setToolTipText("Cancel");
           close_btn.setBounds(130, 75, 80, 20);
          ActionListener chooseMe = createChoiceAction();
          ok_btn.addActionListener(chooseMe);
          close_btn.addActionListener(chooseMe);
          browse_btn.addActionListener(new ActionListener() {
              public void actionPerformed(ActionEvent e) {
                  JFileChooser fileChooser = new JFileChooser();
                  int selection = JFileChooser.FILES_AND_DIRECTORIES;
                  fileChooser.setFileSelectionMode(selection);
                  fileChooser.setAcceptAllFileFilterUsed(false);
                  int rVal = fileChooser.showOpenDialog(null);
                  if (rVal == JFileChooser.APPROVE_OPTION) {
                      path = fileChooser.getSelectedFile().toString();
                      regtxt_file.setText(path);
                  }
              }
  
          });
           rows.add(Box.createVerticalStrut(105));
           Browse_panel.add(rows,BorderLayout.CENTER);
          return Browse_panel;
      }
  
      public  static ActionListener createChoiceAction() {
          ActionListener chooseMe = new ActionListener() {
              @Override
              public void actionPerformed(ActionEvent e) {
                  JButton choice = (JButton) e.getSource();
  
                  // find the pane so we can set the choice.
                  Container parent = choice.getParent();
                  while (!PANE_NAME.equals(parent.getName())) {
                      parent = parent.getParent();
  
                  }
  
                  JOptionPane pane = (JOptionPane) parent;
                  pane.setInputValue(choice.getText());
  
                  // find the dialog so we can close it.
                  while ((parent != null) &amp;&amp; !DIALOG_NAME.equals(parent.getName()))
                  { 
                      parent = parent.getParent();
                  //parent.setBounds(0, 0, 350, 150);
                  }
  
                 if (parent != null) {
                      parent.setVisible(false);
                  }
              }
          };
          return chooseMe;
      } 
  }
  </code></pre>