Java-Buddy: Read text file with JavaFX FileChooser

Monday, May 14, 2012

Read text file with JavaFX FileChooser

Example to choose and read text file with JavaFX FileChooser.

choose and read text file with JavaFX FileChooser

package javafxfilechooser;
import java.io.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextAreaBuilder;
import javafx.scene.layout.VBox;
import javafx.scene.layout.VBoxBuilder;
import javafx.stage.FileChooser;
import javafx.stage.Stage;
/**
 *
 * @web http://java-buddy.blogspot.com/
 */
public class JavaFX_OpenFile extends Application {
 /**
 * @param args the command line arguments
 */
 public static void main(String[] args) {
 launch(args);
 }
 
 @Override
 public void start(final Stage primaryStage) {
 primaryStage.setTitle("java-buddy.blogspot.com");
 Group root = new Group();
 
 
 
 final TextArea textArea = TextAreaBuilder.create()
 .prefWidth(400)
 .wrapText(true)
 .build();
 
 ScrollPane scrollPane = new ScrollPane();
 scrollPane.getStyleClass().add("noborder-scroll-pane");
 scrollPane.setContent(textArea);
 scrollPane.setFitToWidth(true);
 scrollPane.setPrefWidth(400);
 scrollPane.setPrefHeight(180);
 
 Button buttonLoad = new Button("Load");
 buttonLoad.setOnAction(new EventHandler<ActionEvent>(){
 @Override
 public void handle(ActionEvent arg0) {
 FileChooser fileChooser = new FileChooser();
 
 //Set extension filter
 FileChooser.ExtensionFilter extFilter = new FileChooser.ExtensionFilter("TXT files (*.txt)", "*.txt");
 fileChooser.getExtensionFilters().add(extFilter);
 
 //Show save file dialog
 File file = fileChooser.showOpenDialog(primaryStage);
 if(file != null){
 textArea.setText(readFile(file));
 }
 }
 
 });
 
 VBox vBox = VBoxBuilder.create()
 .children(buttonLoad, scrollPane)
 .build();
 
 root.getChildren().add(vBox);
 primaryStage.setScene(new Scene(root, 500, 400));
 primaryStage.show();
 }
 
 private String readFile(File file){
 StringBuilder stringBuffer = new StringBuilder();
 BufferedReader bufferedReader = null;
 
 try {
 bufferedReader = new BufferedReader(new FileReader(file));
 
 String text;
 while ((text = bufferedReader.readLine()) != null) {
 stringBuffer.append(text);
 }
 } catch (FileNotFoundException ex) {
 Logger.getLogger(JavaFX_OpenFile.class.getName()).log(Level.SEVERE, null, ex);
 } catch (IOException ex) {
 Logger.getLogger(JavaFX_OpenFile.class.getName()).log(Level.SEVERE, null, ex);
 } finally {
 try {
 bufferedReader.close();
 } catch (IOException ex) {
 Logger.getLogger(JavaFX_OpenFile.class.getName()).log(Level.SEVERE, null, ex);
 }
 } 
 
 return stringBuffer.toString();
 }
}