Program: 51150
Project: 51150
Buggy source:
private void newJDBCExplorerMenuItemActionPerformed(java.awt.event.ActionEvent evt){
  try {
    if (jdbcDriverClassName == null || jdbcDriverClassName.trim().length() == 0 || jdbcConnectionUrl == null || jdbcConnectionUrl.trim().length() == 0) {
      throw new Exception("String_Node_Str" + this.jdbcDriverClassName + "String_Node_Str"+ this.jdbcConnectionUrl);
    }
    JInternalFrame jf=new JInternalFrame();
    jf.setTitle(getResourceConverter().getFormattedString("String_Node_Str","String_Node_Str",new String[]{jdbcConnectionUrl}));
    Class.forName(jdbcDriverClassName);
    java.sql.Connection conn=null;
    if (jdbcUsername != null && jdbcUsername.length() > 0 && jdbcPassword != null && jdbcPassword.length() > 0) {
      conn=java.sql.DriverManager.getConnection(jdbcConnectionUrl,jdbcUsername,jdbcPassword);
    }
 else {
      conn=java.sql.DriverManager.getConnection(jdbcConnectionUrl);
    }
    JDBCExplorer jdbce=new JDBCExplorer(conn);
    jf.getContentPane().add(jdbce);
    jf.setBounds(0,0,500,480);
    jf.setClosable(true);
    jf.setIconifiable(true);
    jf.setMaximizable(true);
    jf.setResizable(true);
    jf.setVisible(true);
    desktopPane.add(jf);
    jf.show();
  }
 catch (  Exception ex) {
    JOptionPane.showMessageDialog(this,getResourceConverter().getFormattedString("String_Node_Str","String_Node_Str",new String[]{ex.getLocalizedMessage()}),getResourceConverter().getString("String_Node_Str","String_Node_Str"),JOptionPane.ERROR_MESSAGE);
    LOGGER.error("String_Node_Str",ex);
  }
}

Fixed version (ground truth):
private void newJDBCExplorerMenuItemActionPerformed(java.awt.event.ActionEvent evt){
  try {
    if (jdbcDriverClassName == null || jdbcDriverClassName.trim().length() == 0 || jdbcConnectionUrl == null || jdbcConnectionUrl.trim().length() == 0) {
      throw new Exception("String_Node_Str" + this.jdbcDriverClassName + "String_Node_Str"+ this.jdbcConnectionUrl);
    }
    final JInternalFrame jf=new JInternalFrame();
    jf.setTitle(getResourceConverter().getFormattedString("String_Node_Str","String_Node_Str",new String[]{jdbcConnectionUrl}));
    Class.forName(jdbcDriverClassName);
    java.sql.Connection conn=null;
    if (jdbcUsername != null && jdbcUsername.length() > 0 && jdbcPassword != null && jdbcPassword.length() > 0) {
      conn=java.sql.DriverManager.getConnection(jdbcConnectionUrl,jdbcUsername,jdbcPassword);
    }
 else {
      conn=java.sql.DriverManager.getConnection(jdbcConnectionUrl);
    }
    JDBCExplorer jdbce=new JDBCExplorer(conn);
    jf.getContentPane().add(jdbce);
    jf.setBounds(0,0,500,480);
    jf.setClosable(true);
    jf.setIconifiable(true);
    jf.setMaximizable(true);
    jf.setResizable(true);
    jf.setVisible(true);
    final javax.swing.JMenuItem jdbcMenuItem=new javax.swing.JMenuItem();
    jdbcMenuItem.setText(getResourceConverter().getFormattedString("String_Node_Str","String_Node_Str",new String[]{Integer.toString(windowMenuMapIndex++)}));
    jdbcMenuItem.addActionListener(new java.awt.event.ActionListener(){
      public void actionPerformed(      java.awt.event.ActionEvent evt){
        try {
          if (jf.isIcon()) {
            jf.setIcon(false);
          }
 else {
            jf.setSelected(true);
          }
        }
 catch (        Exception ex) {
          LOGGER.error("String_Node_Str",ex);
        }
      }
    }
);
    jf.addInternalFrameListener(new InternalFrameAdapter(){
      public void internalFrameClosing(      InternalFrameEvent e){
        jdbcWindows.remove(jf);
        jf.dispose();
        windowMenu.remove(jdbcMenuItem);
        return;
      }
    }
);
    desktopPane.add(jf);
    jf.setVisible(true);
    jf.show();
    try {
      jf.setSelected(true);
    }
 catch (    Exception ex) {
      LOGGER.error("String_Node_Str",ex);
    }
    jdbcWindows.add(jf);
    windowMenu.add(jdbcMenuItem,-1);
    windowMenu.add(jSeparator3,-1);
    windowMenu.add(cascadeMenuItem,-1);
    windowMenu.add(tileMenuItem,-1);
    windowMenu.add(minimizeMenuItem,-1);
    windowMenu.add(maximizeMenuItem,-1);
    windowMenu.add(closeAllMenuItem,-1);
  }
 catch (  Exception ex) {
    JOptionPane.showMessageDialog(this,getResourceConverter().getFormattedString("String_Node_Str","String_Node_Str",new String[]{ex.getLocalizedMessage()}),getResourceConverter().getString("String_Node_Str","String_Node_Str"),JOptionPane.ERROR_MESSAGE);
    LOGGER.error("String_Node_Str",ex);
  }
}