Program: 46545
Project: 46545
Buggy source:
public NotificationPopup(String noteText,int x,int y,boolean in_fade) throws IOException {
  this.setFocusableWindowState(false);
  final NotificationPopup f=this;
  fade=in_fade;
  Container con=this.getContentPane();
  setUndecorated(true);
  setSize(WIDTH,HEIGHT);
  con.setLayout(new GridBagLayout());
  final Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();
  final Insets scnMax=Toolkit.getDefaultToolkit().getScreenInsets(getGraphicsConfiguration());
  final int taskBarSize=scnMax.bottom;
  setLocation(x,y);
  lpg=new LinearGradientPaint(0,0,0,getHeight() / 2,new float[]{0f,0.3f,1f},new Color[]{new Color(0.8f,0.8f,1f),new Color(0.75f,0.7f,1f),new Color(0.65f,0.6f,1f)});
  setContentPane(new BackgroundPanel());
  final Container c=this.getContentPane();
  c.setLayout(new GridBagLayout());
  final GridBagConstraints constraints=new GridBagConstraints();
  constraints.gridx=0;
  constraints.gridy=0;
  constraints.weightx=1.0f;
  constraints.weighty=1.0f;
  constraints.insets=new Insets(5,15,5,5);
  constraints.anchor=GridBagConstraints.BASELINE;
  constraints.fill=GridBagConstraints.BOTH;
  final JEditorPane l=new JEditorPane("String_Node_Str",noteText);
  l.setEditable(false);
  l.setOpaque(false);
  l.addHyperlinkListener(new HyperlinkListener(){
    @Override public void hyperlinkUpdate(    HyperlinkEvent he){
      if (HyperlinkEvent.EventType.ACTIVATED.equals(he.getEventType())) {
        try {
          Desktop desktop=Desktop.getDesktop();
          desktop.browse(URI.create(he.getURL().toString()));
        }
 catch (        Throwable t) {
          System.out.println("String_Node_Str");
        }
      }
    }
  }
);
  c.add(l,constraints);
  constraints.gridx++;
  constraints.weightx=0f;
  constraints.weighty=0f;
  constraints.fill=GridBagConstraints.BOTH;
  constraints.anchor=GridBagConstraints.CENTER;
  final JButton b=new JButton(new AbstractAction("String_Node_Str"){
    @Override public void actionPerformed(    final ActionEvent e){
      f.dispose();
    }
  }
);
  b.setOpaque(false);
  b.setFocusable(false);
  c.add(b,constraints);
  this.setAlwaysOnTop(true);
}

Fixed version (ground truth):
public NotificationPopup(String noteText,int x,int y,boolean in_fade) throws IOException {
  this.setFocusableWindowState(false);
  final NotificationPopup f=this;
  fade=in_fade;
  Container con=this.getContentPane();
  setSize(WIDTH,HEIGHT);
  con.setLayout(new GridBagLayout());
  final Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();
  final Insets scnMax=Toolkit.getDefaultToolkit().getScreenInsets(getGraphicsConfiguration());
  final int taskBarSize=scnMax.bottom;
  setLocation(x,y);
  lpg=new LinearGradientPaint(0,0,0,getHeight() / 2,new float[]{0f,0.3f,1f},new Color[]{new Color(0.8f,0.8f,1f),new Color(0.75f,0.7f,1f),new Color(0.65f,0.6f,1f)});
  setContentPane(new BackgroundPanel());
  final Container c=this.getContentPane();
  c.setLayout(new GridBagLayout());
  final GridBagConstraints constraints=new GridBagConstraints();
  constraints.gridx=0;
  constraints.gridy=0;
  constraints.weightx=1.0f;
  constraints.weighty=1.0f;
  constraints.insets=new Insets(5,15,5,5);
  constraints.anchor=GridBagConstraints.BASELINE;
  constraints.fill=GridBagConstraints.BOTH;
  final JEditorPane l=new JEditorPane("String_Node_Str",noteText);
  l.setEditable(false);
  l.setOpaque(false);
  l.addHyperlinkListener(new HyperlinkListener(){
    @Override public void hyperlinkUpdate(    HyperlinkEvent he){
      if (HyperlinkEvent.EventType.ACTIVATED.equals(he.getEventType())) {
        try {
          Desktop desktop=Desktop.getDesktop();
          desktop.browse(URI.create(he.getURL().toString()));
        }
 catch (        Throwable t) {
          System.out.println("String_Node_Str");
        }
      }
    }
  }
);
  c.add(l,constraints);
  constraints.gridx++;
  constraints.weightx=0f;
  constraints.weighty=0f;
  constraints.fill=GridBagConstraints.BOTH;
  constraints.anchor=GridBagConstraints.CENTER;
  final JButton b=new JButton(new AbstractAction("String_Node_Str"){
    @Override public void actionPerformed(    final ActionEvent e){
      f.dispose();
    }
  }
);
  b.setOpaque(false);
  b.setFocusable(false);
  c.add(b,constraints);
  this.setAlwaysOnTop(true);
}