[英]JFrame doesn't dispose()
因此,我有一個登錄JFrame,它在運行代碼時顯示。 問題是,如果用戶輸入正確的用戶名和密碼,則在顯示另一個框架時就需要丟棄此登錄框架,但實際上並沒有。 我嘗試了dispose()
, setVisible = false
,但是仍然沒有機會被隱藏或處置。
class LoggingWindow extends JFrame {
static JFrame loginFrame = new JFrame();
JPanel loginPanel = new JPanel();
JTextField loginNameFld = new JTextField(10);
JPasswordField loginPassFld = new JPasswordField(10);
JTextField statusFld = new JTextField(11);
String userName = "user";
String password = "password";
//Initialize loginFrame
public static void initLoginFrame() {
JFrame loginWindow = new LoggingWindow();
//loginFrame.setTitle("\"Moflo Registration\"");
loginWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
loginWindow.setResizable(false);
loginWindow.setUndecorated(true);
loginWindow.setVisible(true);
loginWindow.getRootPane().setWindowDecorationStyle(JRootPane.NONE);
loginWindow.setSize(new Dimension(220, 290));
loginWindow.setLocationRelativeTo(null);
loginWindow.pack();
LoggingWindow() {
loginFrame.add(loginPanel);
loginPanel.setLayout(new GridBagLayout());
GridBagConstraints gbb = new GridBagConstraints();
gbb.insets = new Insets(1, 1, 1, 1);
gbb.anchor = GridBagConstraints.CENTER;
JPanel loginNameAndPasswordPanel = new JPanel();
loginPanel.add(loginNameAndPasswordPanel,gbb);
gbb.gridx = 0;
gbb.gridy = 2;
loginNameAndPasswordPanel.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.anchor = GridBagConstraints.LINE_END;
gbc.insets = new Insets(0,0,0,0);
JLabel loginNameLab = new JLabel("Нэр : ");
gbc.gridx = 0;
gbc.gridy = 0;
loginNameAndPasswordPanel.add(loginNameLab, gbc);
JLabel loginPassLab = new JLabel("Нууц үг : ");
gbc.gridx = 0;
gbc.gridy = 1;
loginNameAndPasswordPanel.add(loginPassLab, gbc);
loginNameFld.setHorizontalAlignment(JTextField.CENTER);
gbc.gridx = 1;
gbc.gridy = 0;
loginNameAndPasswordPanel.add(loginNameFld, gbc);
loginPassFld.setHorizontalAlignment(JTextField.CENTER);
gbc.gridx = 1;
gbc.gridy = 1;
loginNameAndPasswordPanel.add(loginPassFld, gbc);
statusFld.setEditable(false);
loginNameAndPasswordPanel.add(statusFld, gbc);
statusFld.setHorizontalAlignment(JTextField.CENTER);
JPanel buttonsPanel = new JPanel();
loginPanel.add(buttonsPanel,gbb);
gbb.gridx = 0;
gbb.gridy = 3;
buttonsPanel.setLayout(new GridBagLayout());
GridBagConstraints gba = new GridBagConstraints();
gba.anchor = GridBagConstraints.LINE_END;
gba.insets = new Insets(2, 2, 2, 2);
JButton loginBtn = new JButton("Нэвтрэх");
gba.gridx = 0;
gba.gridy = 0;
buttonsPanel.add(loginBtn, gba);
loginBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent event) {
String name = loginNameFld.getText();
String pass = loginPassFld.getText();
if(event.getSource() == loginBtn){
if (name.equals(userName) && pass.equals(password)) {
initMainFrame();
loginFrame.dispose();
JOptionPane.showMessageDialog(null, "Системд нэвтэрлээ. Өнөөдөр " + showDate, " ", JOptionPane.INFORMATION_MESSAGE);
} else {
statusFld.setText("Нэр эсвэл нууц үг буруу байна.");
}
}
}
});
JButton closeBtn = new JButton(" Хаах ");
gba.gridx = 1;
gba.gridy = 0;
buttonsPanel.add(closeBtn, gba);
add(loginPanel);
closeBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent event) {
System.exit(0);
}
});
}
//Main method
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
initLoginFrame();
}
});
}
}
public class MainFrame extends JFrame {
//Initialzie mainFrame
public static void initMainFrame() {
JFrame mainFrame = new MainFrame();
mainFrame.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
mainFrame.setVisible(true);
mainFrame.setExtendedState(Frame.MAXIMIZED_BOTH);
mainFrame.setMinimumSize(new Dimension(800, 600));
mainFrame.setLocationRelativeTo(null);
}
有些人,為簡潔起見,我認為不顯示不重要的陳述
我相信您將“ loginWindow”與“ loginFrame”混淆了。 您嘗試使用
loginFrame.dispose();
但您的內容位於loginWindow上,而不是loginFrame上。
我能夠執行以下操作來配置用戶名窗口。
static JFrame loginWindow; <--- create as class variable, not local.
//loginFrame.add(loginPanel); <--- doesn't appear that this is actually used
if(event.getSource() == loginBtn){
if (name.equals(userName) && pass.equals(password)) {
MainFrame.initMainFrame();
//loginFrame.dispose(); <--- again, not used
loginWindow.dispose(); <--- want to dispose
JOptionPane.showMessageDialog(null, "Системд нэвтэрлээ. Өнөөдөр " , " ", JOptionPane.INFORMATION_MESSAGE);
} else {
statusFld.setText("Нэр эсвэл нууц үг буруу байна.");
}
}
您還必須更改此設置:
JFrame loginWindow = new LoggingWindow();
至:
loginWindow = new LoggingWindow();
您始終可以將“ close”事件調度到JFrame對象:
loginFrame.dispatchEvent(new WindowEvent(loginFrame, WindowEvent.WINDOW_CLOSING));
我絕對與loginFrame混淆確實是沒用的。 我創建了一個類變量:static JFrame loginWindow; 但結果為NullPointerException。
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