Java Swing可滾動框架

Question

如何使用Java Swing將滾動條添加到我的框架中？我有一個面板中的很多內容，並需要使其滾動，以不採取全屏幕的高度..

我試過了folliwing代碼，但它只是增加了一個滾動條，沒有可滾動的內容

// add the panel to a JScrollPane 
JScrollPane jScrollPane = new JScrollPane(panel); 
// only a configuration to the jScrollPane... 
jScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); 
jScrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED); 

// Then, add the jScrollPane to your frame 
frame.getContentPane().add(jScrollPane); 

這是我的代碼：

private void initialize() { 
    frame = new JFrame(); 
    frame.setBounds(100, 100, 500, 665); 
    frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 

    JPanel panel = new JPanel(); 
    frame.getContentPane().add(panel, BorderLayout.CENTER); 
    panel.setLayout(null); 

    JLabel lblPersonalInfo = new JLabel("Personal Information"); 
    lblPersonalInfo.setFont(new Font("Arial", Font.BOLD, 16)); 
    lblPersonalInfo.setBounds(110, 11, 185, 14); 
    panel.add(lblPersonalInfo); 

    JLabel lblGender = new JLabel("Gender"); 
    lblGender.setBounds(10, 111, 46, 14); 
    panel.add(lblGender); 

    JLabel lblAddress = new JLabel("Address"); 
    lblAddress.setBounds(10, 164, 58, 14); 
    panel.add(lblAddress); 

    JLabel lblMobile = new JLabel("Mobile"); 
    lblMobile.setBounds(10, 189, 46, 14); 
    panel.add(lblMobile); 

    JLabel lblEmail = new JLabel("E-mail"); 
    lblEmail.setBounds(10, 214, 46, 14); 
    panel.add(lblEmail); 

    JRadioButton rdbtnM_2 = new JRadioButton("M"); 
    rdbtnM_2.setBounds(74, 133, 109, 23); 
    panel.add(rdbtnM_2); 

    JRadioButton rdbtnF = new JRadioButton("F"); 
    rdbtnF.setBounds(74, 107, 109, 23); 
    panel.add(rdbtnF); 

    JTextPane textName = new JTextPane(); 
    textName.setBounds(95, 36, 302, 20); 
    panel.add(textName); 

    JTextPane textNationality = new JTextPane(); 
    textNationality.setBounds(95, 61, 302, 20); 
    panel.add(textNationality); 

    JTextPane textDate = new JTextPane(); 
    textDate.setBounds(95, 86, 302, 20); 
    panel.add(textDate); 

    JTextPane textAddress = new JTextPane(); 
    textAddress.setBounds(95, 164, 302, 20); 
    panel.add(textAddress); 

    JLabel lblWebsiteblog = new JLabel("Website/Blog"); 
    lblWebsiteblog.setBounds(10, 244, 78, 23); 
    panel.add(lblWebsiteblog); 

    JTextPane textWebsite = new JTextPane(); 
    textWebsite.setBounds(95, 239, 302, 20); 
    panel.add(textWebsite); 

    JLabel lblProfesional = new JLabel("Profesional Experience"); 
    lblProfesional.setBounds(10, 267, 133, 23); 
    panel.add(lblProfesional); 


    JLabel lblEducationAndTraining = new JLabel("Education and Training"); 
    lblEducationAndTraining.setBounds(10, 441, 133, 14); 
    panel.add(lblEducationAndTraining); 

    JTextArea textProfesional = new JTextArea(); 
    textProfesional.setWrapStyleWord(true); 
    textProfesional.setBounds(40, 301, 384, 129); 
    panel.add(textProfesional); 

    JScrollPane scrollPane = new JScrollPane(textProfesional); 
    scrollPane.setBounds(40, 301, 384, 129); 
    panel.add(scrollPane); 

    JTextArea textEducation = new JTextArea(); 
    textEducation.setBounds(40, 466, 384, 142); 
    panel.add(textEducation); 

    scrollPane_1 = new JScrollPane(textEducation); 
    scrollPane_1.setBounds(40, 466, 384, 142); 
    panel.add(scrollPane_1); 
} 

Answer 1

panel.setLayout(null); 

不要使用空佈局。

只有當面板的首選大小大於滾動窗格的大小時纔會顯示滾動條。當您使用空佈局時，首選大小爲（0，0），因此沒有理由顯示滾動條。

Swing設計用於佈局管理器。當您使用佈局管理器時，面板的首選大小將由佈局管理器計算。

有關更多信息和工作示例，請參閱Swing教程Layout Managers中的部分。