Program: 131041
Project: 131041
Buggy source:
private EnhancedS3FileChooser(Frame frame){
  super(frame,"String_Node_Str",true);
  this.setLayout(new BorderLayout());
  JComboBox accountCombo=new JComboBox(ACCOUNT_LIST);
  accountCombo.setMinimumSize(new Dimension(200,30));
  accountCombo.setPreferredSize(new Dimension(200,30));
  accountCombo.setMaximumSize(new Dimension(200,30));
  JPanel accountPanel=new JPanel();
  accountPanel.setBorder(BorderFactory.createEmptyBorder(5,0,5,0));
  accountPanel.setLayout(new BoxLayout(accountPanel,BoxLayout.X_AXIS));
  accountPanel.add(Box.createHorizontalGlue());
  accountPanel.add(new JLabel("String_Node_Str"));
  accountPanel.add(accountCombo);
  accountPanel.add(Box.createHorizontalGlue());
  FILTER_PANEL.setPreferredSize(new Dimension(400,400));
  fileList.registerListener(this);
  JPanel mainArea;
  if (current_mode == EnhancedS3FileChooser.MODE_SCAN) {
    mainArea=new JPanel(new GridLayout(1,2));
    mainArea.add(FILTER_PANEL);
    mainArea.add(fileList);
  }
 else {
    mainArea=new JPanel(new BorderLayout());
    mainArea.add(fileList,BorderLayout.CENTER);
  }
  mainArea.setBorder(BorderFactory.createMatteBorder(1,0,1,0,Color.lightGray));
  btnLoad.setActionCommand(ACTION_LOAD);
  btnLoad.addActionListener(this);
  btnLoad.setEnabled(false);
  getRootPane().setDefaultButton(btnLoad);
  JButton btnCancel=new JButton("String_Node_Str");
  btnCancel.addActionListener(this);
  JPanel buttonPanel=new JPanel();
  buttonPanel.setLayout(new BoxLayout(buttonPanel,BoxLayout.LINE_AXIS));
  buttonPanel.setBorder(BorderFactory.createEmptyBorder(5,10,5,10));
  buttonPanel.add(new JLabel("String_Node_Str"));
  buttonPanel.add(Box.createHorizontalGlue());
  buttonPanel.add(btnCancel);
  buttonPanel.add(Box.createRigidArea(new Dimension(10,0)));
  buttonPanel.add(btnLoad);
  Container contentPane=getContentPane();
  contentPane.add(accountPanel,BorderLayout.PAGE_START);
  contentPane.add(mainArea,BorderLayout.CENTER);
  contentPane.add(buttonPanel,BorderLayout.PAGE_END);
  this.setResizable(false);
  pack();
  setLocationRelativeTo(frame);
}

Fixed version (ground truth):
private EnhancedS3FileChooser(Frame frame){
  super(frame,"String_Node_Str",true);
  this.setLayout(new BorderLayout());
  final JComboBox accountCombo=new JComboBox(ACCOUNT_LIST);
  accountCombo.setMinimumSize(new Dimension(200,30));
  accountCombo.setPreferredSize(new Dimension(200,30));
  accountCombo.setMaximumSize(new Dimension(200,30));
  accountCombo.addActionListener(new ActionListener(){
    @Override public void actionPerformed(    ActionEvent e){
      String newAccount=(String)accountCombo.getSelectedItem();
      currentAccount=ACCOUNT_MAP.get(newAccount);
      setCurrentAccount(currentAccount);
      fileList.init();
    }
  }
);
  JPanel accountPanel=new JPanel();
  accountPanel.setBorder(BorderFactory.createEmptyBorder(5,0,5,0));
  accountPanel.setLayout(new BoxLayout(accountPanel,BoxLayout.X_AXIS));
  accountPanel.add(Box.createHorizontalGlue());
  accountPanel.add(new JLabel("String_Node_Str"));
  accountPanel.add(accountCombo);
  accountPanel.add(Box.createHorizontalGlue());
  FILTER_PANEL.setPreferredSize(new Dimension(400,400));
  fileList.registerListener(this);
  JPanel mainArea;
  if (current_mode == EnhancedS3FileChooser.MODE_SCAN) {
    mainArea=new JPanel(new GridLayout(1,2));
    mainArea.add(FILTER_PANEL);
    mainArea.add(fileList);
  }
 else {
    mainArea=new JPanel(new BorderLayout());
    mainArea.add(fileList,BorderLayout.CENTER);
  }
  mainArea.setBorder(BorderFactory.createMatteBorder(1,0,1,0,Color.lightGray));
  btnLoad.setActionCommand(ACTION_LOAD);
  btnLoad.addActionListener(this);
  btnLoad.setEnabled(false);
  getRootPane().setDefaultButton(btnLoad);
  JButton btnCancel=new JButton("String_Node_Str");
  btnCancel.addActionListener(this);
  JPanel buttonPanel=new JPanel();
  buttonPanel.setLayout(new BoxLayout(buttonPanel,BoxLayout.LINE_AXIS));
  buttonPanel.setBorder(BorderFactory.createEmptyBorder(5,10,5,10));
  buttonPanel.add(new JLabel("String_Node_Str"));
  buttonPanel.add(Box.createHorizontalGlue());
  buttonPanel.add(btnCancel);
  buttonPanel.add(Box.createRigidArea(new Dimension(10,0)));
  buttonPanel.add(btnLoad);
  Container contentPane=getContentPane();
  contentPane.add(accountPanel,BorderLayout.PAGE_START);
  contentPane.add(mainArea,BorderLayout.CENTER);
  contentPane.add(buttonPanel,BorderLayout.PAGE_END);
  this.setResizable(false);
  pack();
  setLocationRelativeTo(frame);
}