Program: 13082
Project: 13082
Buggy source:
public DiffWizardDialog(final JFrame owner,final Properties preferences) throws MalformedURLException {
  super(owner,"String_Node_Str",true);
  this.preferences=preferences;
  this.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
  Container cp=getContentPane();
  cp.setLayout(new BorderLayout());
  JPanel buttonsPanel=new JPanel();
  startButton=new JButton("String_Node_Str");
  startButton.addActionListener(new ActionListener(){
    @Override public void actionPerformed(    ActionEvent e){
      startButton.setEnabled(false);
      doDiff();
    }
  }
);
  startButton.setPreferredSize(new Dimension(80,25));
  buttonsPanel.add(startButton);
  cancelButton=new JButton("String_Node_Str");
  cancelButton.addActionListener(new ActionListener(){
    @Override public void actionPerformed(    ActionEvent e){
      result=Result.CANCELED;
      DiffWizardDialog.this.dispose();
    }
  }
);
  cancelButton.setPreferredSize(new Dimension(80,25));
  buttonsPanel.add(cancelButton);
  cp.add(buttonsPanel,BorderLayout.SOUTH);
  JPanel centralPanel=new JPanel();
  centralPanel.setLayout(new BoxLayout(centralPanel,BoxLayout.Y_AXIS));
  String diffPath1=(String)preferences.get(PreferencesKeys.DIFF_PATH1.name());
  if (diffPath1 == null) {
    diffPath1=(String)preferences.get(PreferencesKeys.PATH.name());
  }
  JPanel row1=new JPanel(new BorderLayout(10,10));
  row1.add(new JLabel("String_Node_Str"),BorderLayout.WEST);
  diffPathTextField1=new JTextField(diffPath1);
  row1.add(diffPathTextField1,BorderLayout.CENTER);
  openButton1=new JButton("String_Node_Str");
  row1.add(openButton1,BorderLayout.EAST);
  centralPanel.add(row1);
  openButton1.addActionListener(new FileSelector(owner,diffPathTextField1,PreferencesKeys.DIFF_PATH1.name()));
  String diffPath2=(String)preferences.get(PreferencesKeys.DIFF_PATH2.name());
  JPanel row2=new JPanel(new BorderLayout(10,10));
  row2.add(new JLabel("String_Node_Str"),BorderLayout.WEST);
  diffPathTextField2=new JTextField(diffPath2);
  row2.add(diffPathTextField2,BorderLayout.CENTER);
  openButton2=new JButton("String_Node_Str");
  row2.add(openButton2,BorderLayout.EAST);
  centralPanel.add(row2);
  openButton2.addActionListener(new FileSelector(owner,diffPathTextField2,PreferencesKeys.DIFF_PATH2.name()));
  diffPathTextField2.getDocument().addDocumentListener(new DocumentListener(){
    @Override public void insertUpdate(    DocumentEvent e){
      System.out.println("String_Node_Str");
      final String path1=diffPathTextField1.getText();
      final String path2=diffPathTextField2.getText();
      final String ignoredKeysFile=ignoredKeysTextField.getText();
      File file1=new File(path1);
      File file2=new File(path2);
      diffPathTextField3.setText(new File(new File(file1.getParent()).getParent(),new File(file1.getParent()).getName() + "String_Node_Str" + new File(file2.getParent()).getName()).getAbsolutePath());
      preferences.setProperty(PreferencesKeys.DIFF_PATH3.name(),diffPathTextField3.getText());
      try {
        preferences.store(new FileOutputStream(TopologyManagerFrame.VIEWER_PREFERENCES_PROPERTIES),"String_Node_Str");
      }
 catch (      IOException e1) {
        e1.printStackTrace();
        JOptionPane.showMessageDialog(owner,"String_Node_Str" + e1.getMessage(),"String_Node_Str",JOptionPane.ERROR_MESSAGE);
      }
    }
    public void removeUpdate(    DocumentEvent e){
    }
    @Override public void changedUpdate(    DocumentEvent e){
    }
  }
);
  String diffPath3=(String)preferences.get(PreferencesKeys.DIFF_PATH3.name());
  JPanel row3=new JPanel(new BorderLayout(10,10));
  row3.add(new JLabel("String_Node_Str"),BorderLayout.WEST);
  diffPathTextField3=new JTextField(diffPath3);
  row3.add(diffPathTextField3,BorderLayout.CENTER);
  openButton3=new JButton("String_Node_Str");
  row3.add(openButton3,BorderLayout.EAST);
  centralPanel.add(row3);
  openButton3.addActionListener(new FileSelector(owner,diffPathTextField3,PreferencesKeys.DIFF_PATH3.name()));
  String diffConfigPath=(String)preferences.get(PreferencesKeys.DIFF_CONFIG.name());
  JPanel row4=new JPanel(new BorderLayout(10,10));
  row4.add(new JLabel("String_Node_Str"),BorderLayout.WEST);
  diffConfigPathTextField=new JTextField(diffConfigPath);
  row4.add(diffConfigPathTextField,BorderLayout.CENTER);
  openConfigButton=new JButton("String_Node_Str");
  row4.add(openConfigButton,BorderLayout.EAST);
  centralPanel.add(row4);
  openConfigButton.addActionListener(new FileSelector(owner,diffConfigPathTextField,PreferencesKeys.DIFF_CONFIG.name(),false));
  String ignoredKeysPath=(String)preferences.get(PreferencesKeys.IGNORED_KEYS_PATH.name());
  JPanel row5=new JPanel(new BorderLayout(10,10));
  row5.add(new JLabel("String_Node_Str"),BorderLayout.WEST);
  ignoredKeysTextField=new JTextField(ignoredKeysPath);
  row5.add(ignoredKeysTextField,BorderLayout.CENTER);
  ignoredKeysButton=new JButton("String_Node_Str");
  row5.add(ignoredKeysButton,BorderLayout.EAST);
  centralPanel.add(row5);
  ignoredKeysButton.addActionListener(new FileSelector(owner,ignoredKeysTextField,PreferencesKeys.IGNORED_KEYS_PATH.name(),false));
  cp.add(centralPanel,BorderLayout.NORTH);
  setPreferredSize(new Dimension(550,200));
  this.pack();
}

Fixed version (ground truth):
public DiffWizardDialog(final JFrame owner,final Properties preferences) throws MalformedURLException {
  super(owner,"String_Node_Str",true);
  this.preferences=preferences;
  this.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
  Container cp=getContentPane();
  cp.setLayout(new BorderLayout());
  JPanel buttonsPanel=new JPanel();
  startButton=new JButton("String_Node_Str");
  startButton.addActionListener(new ActionListener(){
    @Override public void actionPerformed(    ActionEvent e){
      startButton.setEnabled(false);
      doDiff();
    }
  }
);
  startButton.setPreferredSize(new Dimension(80,25));
  buttonsPanel.add(startButton);
  cancelButton=new JButton("String_Node_Str");
  cancelButton.addActionListener(new ActionListener(){
    @Override public void actionPerformed(    ActionEvent e){
      result=Result.CANCELED;
      DiffWizardDialog.this.dispose();
    }
  }
);
  cancelButton.setPreferredSize(new Dimension(80,25));
  buttonsPanel.add(cancelButton);
  cp.add(buttonsPanel,BorderLayout.SOUTH);
  JPanel centralPanel=new JPanel();
  centralPanel.setLayout(new BoxLayout(centralPanel,BoxLayout.Y_AXIS));
  String diffPath1=(String)preferences.get(PreferencesKeys.DIFF_PATH1.name());
  if (diffPath1 == null) {
    diffPath1=(String)preferences.get(PreferencesKeys.PATH.name());
  }
  JPanel row1=new JPanel(new BorderLayout(10,10));
  row1.add(new JLabel("String_Node_Str"),BorderLayout.WEST);
  diffPathTextField1=new JTextField(diffPath1);
  row1.add(diffPathTextField1,BorderLayout.CENTER);
  openButton1=new JButton("String_Node_Str");
  row1.add(openButton1,BorderLayout.EAST);
  centralPanel.add(row1);
  openButton1.addActionListener(new FileSelector(owner,diffPathTextField1,PreferencesKeys.DIFF_PATH1.name()));
  String diffPath2=(String)preferences.get(PreferencesKeys.DIFF_PATH2.name());
  JPanel row2=new JPanel(new BorderLayout(10,10));
  row2.add(new JLabel("String_Node_Str"),BorderLayout.WEST);
  diffPathTextField2=new JTextField(diffPath2);
  row2.add(diffPathTextField2,BorderLayout.CENTER);
  openButton2=new JButton("String_Node_Str");
  row2.add(openButton2,BorderLayout.EAST);
  centralPanel.add(row2);
  openButton2.addActionListener(new FileSelector(owner,diffPathTextField2,PreferencesKeys.DIFF_PATH2.name()));
  diffPathTextField2.getDocument().addDocumentListener(new DocumentListener(){
    @Override public void insertUpdate(    DocumentEvent e){
      System.out.println("String_Node_Str");
      final String path1=diffPathTextField1.getText();
      final String path2=diffPathTextField2.getText();
      File file1=new File(path1);
      File file2=new File(path2);
      String graphType=null;
      if (path1.endsWith("String_Node_Str") && path1.endsWith("String_Node_Str")) {
        graphType="String_Node_Str";
      }
 else       if (path1.endsWith("String_Node_Str") && path1.endsWith("String_Node_Str")) {
        graphType="String_Node_Str";
      }
      if (graphType != null) {
        diffPathTextField3.setText(new File(new File(new File(file1.getParent()).getParent(),new File(file1.getParent()).getName() + "String_Node_Str" + new File(file2.getParent()).getName()),"String_Node_Str" + graphType).getAbsolutePath());
      }
      preferences.setProperty(PreferencesKeys.DIFF_PATH3.name(),diffPathTextField3.getText());
      try {
        preferences.store(new FileOutputStream(TopologyManagerFrame.VIEWER_PREFERENCES_PROPERTIES),"String_Node_Str");
      }
 catch (      IOException e1) {
        e1.printStackTrace();
        JOptionPane.showMessageDialog(owner,"String_Node_Str" + e1.getMessage(),"String_Node_Str",JOptionPane.ERROR_MESSAGE);
      }
    }
    public void removeUpdate(    DocumentEvent e){
    }
    @Override public void changedUpdate(    DocumentEvent e){
    }
  }
);
  String diffPath3=(String)preferences.get(PreferencesKeys.DIFF_PATH3.name());
  JPanel row3=new JPanel(new BorderLayout(10,10));
  JLabel labelGraph3=new JLabel("String_Node_Str");
  labelGraph3.setBounds(40,0,100,20);
  row3.add(labelGraph3,BorderLayout.WEST);
  diffPathTextField3=new JTextField(diffPath3);
  diffPathTextField3.setEditable(false);
  row3.add(diffPathTextField3,BorderLayout.CENTER);
  openButton3=new JButton("String_Node_Str");
  openButton3.setEnabled(false);
  row3.add(openButton3,BorderLayout.EAST);
  centralPanel.add(row3);
  cp.add(centralPanel,BorderLayout.NORTH);
  setPreferredSize(new Dimension(550,200));
  this.pack();
}