您可以使用将于 2015 年 3 月发布的 JDK8u40 中的对话框或使用来自 ConrolsFX (openjfx-dialogs-1.0.2) 的对话框。有一个代码来实现对话框,直到身份验证未通过才会关闭。
// Create the custom dialog.
Dialog<Pair<String, String>> dialog = new Dialog<>();
dialog.setTitle("Login Dialog");
dialog.setHeaderText("Look, a Custom Login Dialog");
dialog.setGraphic(new ImageView(this.getClass().getResource("login.png").toString()));
// Set the button types.
ButtonType loginButtonType = new ButtonType("Login", ButtonData.OK_DONE);
dialog.getDialogPane().getButtonTypes().addAll(loginButtonType, ButtonType.CANCEL);
// Create the username and password labels and fields.
GridPane grid = new GridPane();
grid.setHgap(10);
grid.setVgap(10);
grid.setPadding(new Insets(20, 150, 10, 10));
TextField username = new TextField();
username.setPromptText("Username");
PasswordField password = new PasswordField();
password.setPromptText("Password");
grid.add(new Label("Username:"), 0, 0);
grid.add(username, 1, 0);
grid.add(new Label("Password:"), 0, 1);
grid.add(password, 1, 1);
// Enable/Disable login button depending on whether a username was entered.
Button loginButton = (Button)dialog.getDialogPane().lookupButton(loginButtonType);
loginButton.setDisable(true);
**// Prevent closing dialog if not authenticated**
loginButton.addEventFilter(ActionEvent.ACTION, (event) -> {
if (!authenticated()) {
event.consume();
}
});
// Do some validation (using the Java 8 lambda syntax).
username.textProperty().addListener((observable, oldValue, newValue) -> {
loginButton.setDisable(newValue.trim().isEmpty());
});
dialog.getDialogPane().setContent(grid);
// Request focus on the username field by default.
Platform.runLater(() -> username.requestFocus());
// Convert the result to a username-password-pair when the login button is clicked.
dialog.setResultConverter(dialogButton -> {
if (dialogButton == loginButtonType) {
return new Pair<>(username.getText(), password.getText());
}
return null;
});
Optional<Pair<String, String>> result = dialog.showAndWait();
result.ifPresent(usernamePassword -> {
System.out.println("Username=" + usernamePassword.getKey() + ", Password=" + usernamePassword.getValue());
});
这个例子是从这篇文章中给出的,你可以在其中找到许多有用的例子