Question

我正在尝试创建一个库存管理程序，并且当用户按下取消按钮时，我需要打开一个确认对话框。所有示例似乎都非常简单明了，但是我的警报没有打开。

AddPartController.java （我保证这不是导入语句所在的位置）

import java.io.IOException;
import java.net.URL;
import java.util.Optional;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonType;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

@FXML
private Button addPartCancelBtn;

@FXML
void addPartCancelBtnHandler(ActionEvent event) throws IOException {

    Alert alert = new Alert(AlertType.CONFIRMATION);
    alert.setTitle("Cancel Add Part");
    alert.setHeaderText("This part will not be added");
    alert.setContentText("Are you ok with this?");
    Optional<ButtonType> result = alert.showAndWait();
    if(result.isPresent() && result.get() == ButtonType.OK) {
        Stage stage;
        Parent root;
        stage = (Stage) addPartCancelBtn.getScene().getWindow();
        FXMLLoader loader = new FXMLLoader(getClass().getResource("Main.fxml"));
        root = loader.load();
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.show();
        System.out.println("OK PRESSED");
     } else {
        Stage stage;
        Parent root;
        stage = (Stage) addPartCancelBtn.getScene().getWindow();
        FXMLLoader loader = new FXMLLoader(getClass().getResource("AddPart.fxml"));
        root = loader.load();
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.show();
        System.out.println("Errror");
    }
}

任何人都可以在这里看到问题吗？

Answer 1

添加了一个Try Catch块来修复它：

@FXML
void addPartCancelBtnHandler(ActionEvent event) throws IOException {
    try {
        Alert alert = new Alert(AlertType.CONFIRMATION);
    alert.setTitle("Cancel Add Part");
    alert.setHeaderText("This part will not be added");
    alert.setContentText("Are you ok with this?");
    alert.getDialogPane().setPrefSize(350, 200);
    Optional<ButtonType> result = alert.showAndWait();
    if(result.isPresent() && result.get() == ButtonType.OK) {
        Stage stage;
        Parent root;
        stage = (Stage) addPartCancelBtn.getScene().getWindow();
        FXMLLoader loader = new FXMLLoader(getClass().getResource("Main.fxml"));
        root = loader.load();
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.show();
        System.out.println("OK PRESSED");
     } else {
        Stage stage;
        Parent root;
        stage = (Stage) addPartCancelBtn.getScene().getWindow();
        FXMLLoader loader = new FXMLLoader(getClass().getResource("AddPart.fxml"));
        root = loader.load();
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.show();
        System.out.println("Errror");
    }
    } catch (IOException e) {
        e.printStackTrace();
    }

}

JavaFX确认警报将不会打开

1 个答案: