JTabbedPane不断添加新面板

Question

我正在尝试在JTabbedPane中创建一系列面板，为用户显示一段信息。现在，我试图获取它，以便在单击编辑按钮后面板将刷新。此按钮将您带到另一个菜单，您可以在其中调整任何字段，然后返回选项卡式窗格。不幸的是，当对象通过使用上述菜单进行更改时，窗格并未正确反映这些更改。做的是使第一个面板和所有标签不可点击，并且似乎使用新信息将新面板添加到前一个面板的底部。这在repaint（）期间发生，因为之前它根本不会改变。

JPanel leftPanel = new JPanel();

    JPanel buttons = new JPanel();

    JPanel title = new JPanel();


    LayoutManager singleLine = new GridLayout(0,2);
    leftPanel.setLayout(singleLine);

    buttons.setLayout(new FlowLayout());

    JLabel header = new JLabel("Basic Student Information");
    title.add(header);

    JLabel StreetLabel = new JLabel("First Name:             ");                //Creates all Labels
    JLabel LNLabel = new JLabel("Last Name:              ");
    JLabel IDLabel = new JLabel("Student ID:             ");
    JLabel GPALabel =new JLabel("GPA:                    ");


    JLabel StreetInfo = new JLabel(selectedStudent.getFirstName().toString());
    JLabel LNInfo = new JLabel(selectedStudent.getLastName().toString());
    JLabel IDInfo = new JLabel(selectedStudent.getID().toString());
    JLabel GPAInfo = new JLabel(selectedStudent.getGpa().toString());

    leftPanel.add(StreetLabel);
    leftPanel.add(StreetInfo);
    leftPanel.add(LNLabel);
    leftPanel.add(LNInfo);
    leftPanel.add(IDLabel);
    leftPanel.add(IDInfo);
    leftPanel.add(GPALabel);
    leftPanel.add(GPAInfo);

    StreetLabel.setHorizontalAlignment(JLabel.LEFT);
    LNLabel.setHorizontalAlignment(JLabel.LEFT);
    IDLabel.setHorizontalAlignment(JLabel.LEFT);
    GPALabel.setHorizontalAlignment(JLabel.LEFT);

    JButton edit = new JButton("Edit");
    JButton close = new JButton("Close");
    buttons.add(edit);
    buttons.add(close);

    basicInfoTab.add(title, BorderLayout.NORTH);
    basicInfoTab.add(leftPanel, BorderLayout.CENTER);
    basicInfoTab.add(buttons, BorderLayout.SOUTH);

    edit.addActionListener(new ActionListener(){
        @Override
        public void actionPerformed(ActionEvent event){
            readMenu.setVisible(false);
            generalInfo();
        }
    });

    close.addActionListener(new ActionListener(){
        @Override
        public void actionPerformed(ActionEvent event){
            if(JOptionPane.showConfirmDialog(null, "Do you wish to exit     this student's record?") == JOptionPane.OK_OPTION){
                readMenu.setVisible(false);
                HomeScreen();
            }
        }
    });

非常感谢任何有助于成功刷新的帮助。