private void createAndShowGUI()

in oak-run/src/main/java/org/apache/jackrabbit/oak/explorer/Explorer.java [95:229]
120 lines of code
7 McCabe index (conditional complexity)

    private void createAndShowGUI(final String path, boolean skipSizeCheck) throws IOException {
        JTextArea log = new JTextArea(5, 20);
        log.setMargin(new Insets(5, 5, 5, 5));
        log.setLineWrap(true);
        log.setEditable(false);

        final NodeStoreTree treePanel = new NodeStoreTree(backend, log, skipSizeCheck);

        final JFrame frame = new JFrame("Explore " + path + " @head");
        frame.addWindowListener(new java.awt.event.WindowAdapter() {
            @Override
            public void windowClosing(java.awt.event.WindowEvent windowEvent) {
                IOUtils.closeQuietly(treePanel);
                System.exit(0);
            }
        });

        JPanel content = new JPanel(new GridBagLayout());

        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.BOTH;
        c.weightx = 1;
        c.weighty = 1;

        JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,
                new JScrollPane(treePanel), new JScrollPane(log));
        splitPane.setDividerLocation(0.3);
        content.add(new JScrollPane(splitPane), c);
        frame.getContentPane().add(content);

        JMenuBar menuBar = new JMenuBar();
        menuBar.setMargin(new Insets(2, 2, 2, 2));

        JMenuItem menuReopen = new JMenuItem("Reopen");
        menuReopen.setMnemonic(KeyEvent.VK_R);
        menuReopen.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent ev) {
                try {
                    treePanel.reopen();
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        });

        JMenuItem menuCompaction = new JMenuItem("Time Machine");
        menuCompaction.setMnemonic(KeyEvent.VK_T);
        menuCompaction.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent ev) {
                List<String> revs = backend.readRevisions();
                String s = (String) JOptionPane.showInputDialog(frame,
                        "Revert to a specified revision", "Time Machine",
                        JOptionPane.PLAIN_MESSAGE, null, revs.toArray(),
                        revs.get(0));
                if (s != null && treePanel.revert(s)) {
                    frame.setTitle("Explore " + path + " @" + s);
                }
            }
        });

        JMenuItem menuRefs = new JMenuItem("Tar File Info");
        menuRefs.setMnemonic(KeyEvent.VK_I);
        menuRefs.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent ev) {
                List<String> tarFiles = backend.getTarFiles();
                String s = (String) JOptionPane.showInputDialog(frame,
                        "Choose a tar file", "Tar File Info",
                        JOptionPane.PLAIN_MESSAGE, null, tarFiles.toArray(),
                        tarFiles.get(0));
                if (s != null) {
                    treePanel.printTarInfo(s);
                }
            }
        });

        JMenuItem menuSCR = new JMenuItem("Segment Refs");
        menuSCR.setMnemonic(KeyEvent.VK_R);
        menuSCR.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent ev) {
                String s = JOptionPane.showInputDialog(frame,
                        "Segment References\nUsage: <segmentId>",
                        "Segment References", JOptionPane.PLAIN_MESSAGE);
                if (s != null) {
                    treePanel.printSegmentReferences(s);
                }
            }
        });

        JMenuItem menuDiff = new JMenuItem("SegmentNodeState diff");
        menuDiff.setMnemonic(KeyEvent.VK_D);
        menuDiff.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent ev) {
                String s = JOptionPane.showInputDialog(frame,
                        "SegmentNodeState diff\nUsage: <recordId> <recordId> [<path>]",
                        "SegmentNodeState diff", JOptionPane.PLAIN_MESSAGE);
                if (s != null) {
                    treePanel.printDiff(s);
                }
            }
        });

        JMenuItem menuPCM = new JMenuItem("Persisted Compaction Maps");
        menuPCM.setMnemonic(KeyEvent.VK_P);
        menuPCM.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent ev) {
                treePanel.printPCMInfo();
            }
        });

        menuBar.add(menuReopen);
        menuBar.add(new JSeparator(JSeparator.VERTICAL));
        menuBar.add(menuCompaction);
        menuBar.add(new JSeparator(JSeparator.VERTICAL));
        menuBar.add(menuRefs);
        menuBar.add(new JSeparator(JSeparator.VERTICAL));
        menuBar.add(menuSCR);
        menuBar.add(new JSeparator(JSeparator.VERTICAL));
        menuBar.add(menuDiff);
        menuBar.add(new JSeparator(JSeparator.VERTICAL));
        menuBar.add(menuPCM);
        menuBar.add(new JSeparator(JSeparator.VERTICAL));

        frame.setJMenuBar(menuBar);
        frame.pack();
        frame.setSize(960, 720);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);

    }