javaFX: showSaveDialog() not saving file with correct extension

Question

I have created small java Program using javafx. in which i'm trying to save any text file or java file. it save file on expected location but without extension this might be the silly question but i don't have any experience with javaFX,

1.Main.java

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("Hello World");
        primaryStage.setScene(new Scene(root, 300, 275));
        primaryStage.show();
    }


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

2.Controller.java

 package sample;
    import javafx.event.ActionEvent;
    import javafx.fxml.FXML;
    import javafx.scene.control.TextArea;
    import javafx.stage.FileChooser;

    import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Controller {

    @FXML
     private TextArea TextArea;
    @FXML
    private ResourceBundle resources;

    @FXML
    private URL location;

    @FXML
    void OnButtonClicked(ActionEvent event) {
        FileChooser fileChooser = new FileChooser();
        FileChooser.ExtensionFilter extFilter = new FileChooser.ExtensionFilter("Java files (*.java)", "*.java");

        fileChooser.getExtensionFilters().add(extFilter);
        File selectedFile = fileChooser.showSaveDialog(null);
        if(selectedFile != null){
            SaveFile(TextArea.getText(), selectedFile);



        }
    }
    private void SaveFile(String content, File file){
        try {
            FileWriter fileWriter;

            fileWriter = new FileWriter(file);
            fileWriter.write(content);
            fileWriter.close();
        } catch (IOException ex) {
            Logger.getLogger(Main.class
                    .getName()).log(Level.SEVERE, null, ex);
        }

    }

    @FXML
    void initialize() {

    }
}

3.sample.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TextArea?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.121" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
    <children>
        <Button layoutX="269.0" layoutY="275.0" mnemonicParsing="false" onAction="#OnButtonClicked" text="Save" />
      <TextArea fx:id="TextArea" layoutX="169.0" layoutY="14.0" prefHeight="200.0" prefWidth="200.0" />
    </children>
</AnchorPane>

I'm currently new to JavaFx and java technology, help will be appreciated!!!

score 1 · Answer 1 · answered Jul 12 '18 at 17:29

1

The filter in the FileChooser is only for filtering existing files in the active folder. If you want to add a default file extension you need something like:

String fileName = file.toString();
if (!fileName.endsWith(".java"))
fileName += ".java";

answered Jul 12 '18 at 17:29

benji2505

106
1
5

javaFX: showSaveDialog() not saving file with correct extension

1 Answers1