使用JavaFX实现显示密码切换

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.PasswordField;
import javafx.scene.control.ToggleButton;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class ShowPasswordToggle extends Application {

    @Override
    public void start(Stage primaryStage) {
        PasswordField passwordField = new PasswordField();
        ToggleButton toggleButton = new ToggleButton("显示密码");

        toggleButton.setOnAction(event -> {
            if (toggleButton.isSelected()) {
                passwordField.setPromptText(passwordField.getText());
                passwordField.setText("");
            } else {
                passwordField.setText(passwordField.getPromptText());
                passwordField.setPromptText("");
            }
        });

        VBox root = new VBox(10);
        root.setPadding(new Insets(10));
        root.getChildren().addAll(passwordField, toggleButton);

        primaryStage.setScene(new Scene(root));
        primaryStage.setTitle("显示密码切换");
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}