Develop Reference

java.lang.IllegalArgumentException: Invalid URL: unknown protocol: m / filechooser path problem [duplicate]

This question already has answers here:
How to load Image file to ImageView?
(3 answers)
Closed 3 years ago.
I am trying to add an image to a gridview using a button that opens up a filechooser that only accepts images. I am getting an exception error when im using the file path from the filechooser to create a setImage to my grid view. I think this is because the path im getting is just not right.
Here is the code where it fails:
public void makeBrowseButton(Stage primaryStage) {
//attach handler
browseButton.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
FileChooser fileChooser = new FileChooser(); // create object
fileChooser.getExtensionFilters().addAll(new FileChooser.ExtensionFilter("Image Files", "*.png", "*.jpg", "*.gif")); //filter for music files
//FileFilter filter = new FileNameExtensionFilter("JPEG file", "jpg", "jpeg");
if ( !parentPath.equalsIgnoreCase("")) { //go to previous directory if exists
File parentPathFile = new File(parentPath);
fileChooser.setInitialDirectory(parentPathFile);
}
File selectedFile = fileChooser.showOpenDialog(primaryStage);
if (selectedFile != null) { // display the dialog box
String wholePath = selectedFile.getPath();
String name = selectedFile.getName();
String megaPath = selectedFile.getAbsolutePath();
parentPath = selectedFile.getParent();
System.out.println("wholePath: " + wholePath);
System.out.println("File Name: " + name);
System.out.println("megaPath: " + megaPath);
Image newAwesomeImage = new Image(megaPath);
ImageView view = new ImageView();
view.setImage(newAwesomeImage);
paneofgridmonkeys.add(view, 0, 0);
//paneofgridmonkeys.add(new Label("Changed the image!"), 0, 1);
createDisplay(primaryStage);
}}});
}
The error message is the title it is saying that the exact problem is line:
view.setImage(newAwesomeImage);
as for my system.out results this is what im getting:
wholePath: M:\Home\BenStillerDuckFace.jpg
File Name: BenStillerDuckFace.jpg
megaPath: M:\Home\BenStillerDuckFace.jpg
ive tried all of these and non work. Any ideas?

The Image(String url) constructor requires a URL string, not a file name. A file name is not a URL.
To convert a file name string to a URL string, do one of these:
// Java 7+
String megaUrl = Paths.get(megaPath).toUri().toURL().toString();
// Java 1.4+
String megaUrl = new File(megaPath).toURI().toURL().toString();

JavaFX - Tab will not show nor file contents when file is opened

I'm trying to create a text editor using JavaFX. I want to be able to open a file from a window into the main window as a tab. So far, I've created the necessary menu items and an option window that contains the function to open the file explorer to select a file.
When the user presses the "Choose File" button, the file explorer is opened. When a user selects a file, the "Open File" window closes. The main window (3rd image) is then left but does not contain a tab with the file contents.
Upon execution of the "openFile()" function, no errors are returned, but no tab is opened. I believe it may be an issue with trying to open the tab within the "chooseFileButton.SetOnAction()" function but cannot confirm.
Any suggestions/explanations would be much appreciated.
Open File
Open File (FileChooser)
Output:
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primary) throws Exception {
primary.setTitle("Chris' Text Editor");
MenuBar menuBar = new MenuBar();
VBox vbox = new VBox(menuBar);
/* FILE MENU */
MenuItem openFile = new MenuItem("Open...");
fileMenu.getItems().add(openFile);
Pane rootPane = new Pane();
TextArea editorTextArea = new TextArea();
editorTextArea.setMinHeight(1000);
editorTextArea.setMinWidth(1000);
editorTextArea.setVisible(false);
rootPane.getChildren().add(editorTextArea);
TabPane tabPane = new TabPane();
tabPane.setSide(Side.TOP);
openFile.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
Label fileLabel = new Label();
fileLabel.setText("No File selected...");
GridPane grid = new GridPane();
Scene contextScene = new Scene(grid, 450, 300);
/* NEW WINDOW */
Stage openFileWindow = new Stage();
openFileWindow.setTitle("Open File");
openFileWindow.setScene(contextScene);
/* SET WINDOW MODAL */
openFileWindow.initModality(Modality.WINDOW_MODAL);
/* SET PARENT WINDOW */
openFileWindow.initOwner(primary);
/* CHOOSE FILE DIRECTORY BUTTON */
openFileWindow.setX(primary.getX() + (primary.getX() / 2));
openFileWindow.setY(primary.getX() + (primary.getX() / 2));
openFileWindow.show();
/* CHOOSE FILE BUTTON */
Button chooseFileButton = new Button();
chooseFileButton.setText("Choose File");
chooseFileButton.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent event) {
FileChooser chooseFile = new FileChooser();
File selectedFile = chooseFile.showOpenDialog(openFileWindow);
if(selectedFile != null) {
String filePath = selectedFile.getPath();
fileLabel.setText(filePath);
String fileContent = openFile2(filePath);
/* CREATE NEW TAB */
Tab newTab = new Tab();
newTab.setContent(editorTextArea);
newTab.setText(filePath);
tabPane.getTabs().add(newTab);
editorTextArea.setVisible(true);
/* POPULATE TEXT AREA WITH FILE CONTENTS */
editorTextArea.appendText(fileContent);
/* FOCUS ON TAB */
SingleSelectionModel<Tab> selection = tabPane.getSelectionModel();
selection.select(newTab);
openFileWindow.close();
}
}
});
grid.setAlignment(Pos.CENTER);
grid.setHgap(10);
grid.setVgap(10);
grid.add(chooseFileButton, 0, 0);
grid.add(fileLabel, 0, 1);
}
});
menuBar.getMenus().add(fileMenu);
Scene scene = new Scene(vbox, 1000, 750);
primary.setScene(scene);
primary.show();
}
public String openFile2(String filePath) {
StringBuilder content = new StringBuilder();
try (Stream<String> stream = Files.lines(Paths.get(filePath), StandardCharsets.UTF_8)){
stream.forEach(s -> content.append(s).append("\n"));
} catch (IOException e) {
e.printStackTrace();
}
return content.toString();
}

You never added your TabPane to the scene:
vbox.getChildren().add(tabPane);

getting corresponding filename of image once button pressed

A Set of imagefiles are added to an arraylist(filelist2) of type File.Then an imageview and a button are addded to a vbox,such vboxes are added to a grids of a gripane using a for loop.( number of iterations is equal to size of the filelist2)Once a button is pressed I need to get the corresponding filename of the image within that vbox.
Say I pressed the button contained at (1,1) {i.e row no01 ,col no1} I need to get filename of image at (1,1)
here's a screenshot:
here's my code: FXMLController
File file = new File("D:\\SERVER\\Server Content\\Apps\\icons");
File[] filelist1 = file.listFiles();
ArrayList<File> filelist2 = new ArrayList<>();
for (File file1 : filelist1) {
filelist2.add(file1);
}
btnar = new ArrayList<>();
for (int i = 0; i < filelist2.size(); i++) {
downloadbtn = new Button("Download");
btnar.add(downloadbtn);
final int index=i;
downloadbtn.setId(String.valueOf(index));
downloadbtn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent arg0) {
try {
System.out.println("sssss");
downloadbtn.getId();
//System.out.println(filelist2.get(Integer.valueOf(downloadbtn.getId())).getName());
} catch (Exception ex) {
Logger.getLogger(HomeUI_2Controller.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
}
System.out.println(filelist2.size());
gridpane.setAlignment(Pos.CENTER);
gridpane.setPadding(new Insets(20, 20, 20, 20));
gridpane.setHgap(20);
gridpane.setVgap(20);
ColumnConstraints columnConstraints = new ColumnConstraints();
columnConstraints.setFillWidth(true);
columnConstraints.setHgrow(Priority.ALWAYS);
gridpane.getColumnConstraints().add(columnConstraints);
int imageCol = 0;
int imageRow = 0;
for (int i = 0; i < filelist2.size(); i++) {
System.out.println(filelist2.get(i).getName());
image = new Image(filelist2.get(i).toURI().toString());
pic = new ImageView();
pic.setFitWidth(130);
pic.setFitHeight(130);
pic.setImage(image);
vb = new VBox();
vb.getChildren().addAll(pic, (Button) btnar.get(i));
gridpane.add(vb, imageCol, imageRow);
GridPane.setMargin(pic, new Insets(2, 2, 2, 2));
imageCol++;
// To check if all the 3 images of a row are completed
if (imageCol > 2) {
// Reset Column
imageCol = 0;
// Next Row
imageRow++;
}
}

Why not simply
System.out.println(filelist2.get(index).getName());
?
(Actually, it's not really clear to me why you create filelist2 at all. Why not do
btnar = new ArrayList<>();
for (int i=0; i < filelist1.length; i++) {
downloadbtn = new Button("Download");
btnar.add(downloadbtn);
final int index=i;
downloadbtn.setId(String.valueOf(index));
downloadbtn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent arg0) {
try {
System.out.println("sssss");
System.out.println(filelist1[index].getName());
} catch (Exception ex) {
Logger.getLogger(HomeUI_2Controller.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
}

Use setUserData and getUserData to store and retrieve custom values in Nodes ! Set the fileName as the userdata and on click, retrieve it.
downloadbtn.setUserData(filelist2.get(index).getName());
downloadbtn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent arg0) {
System.out.println(downloadbtn.getUserData());
}

Consider using a java.util.HashMap<Button, File> and calling hashMap.get(actionEvent.getSource()).getName() to get the file name.

I've created a DataButton which can hold some typed data (unlike userData which has the type Object).
You can specify a Renderer to render the data on the button or to render an alternative text, eg. in your case: "Download".
Eg. you could use something like this:
List<Path> pathlist2 = new ArrayList<>();
...
// provide language specific text for "Download"
ResourceBundle myResourceBundle = ...;
...
DownloadRenderer downloadRenderer = new DownloadRenderer(myResourceBundle);
...
// the dafault renderer would set the text property to path.toString()
DataButton<Path> downloadbtn = new DataButton<>(downloadRenderer);
downloadbtn.setData(pathlist2.get(index));
downloadbtn.setOnAction((actionEvent) -> {
Path path = downloadbtn.getData();
...
});
...
private static class DownloadRenderer extends AbstractDataRenderer<Object> {
private final ResourceBundle myResourceBundle;
public DownloadRenderer(final ResourceBundle myResourceBundle) {
this.myResourceBundle = myResourceBundle;
}
#Override
public String getText(Object item) {
return myResourceBundle.getString("downloadbtn.text");
}
}
As you can see, you can work directly with Path objects (which should be preferred to the legacy File objects). You don't have to cast or convert the data.
Note: you could also omit the DownloadRenderer and set the text property directly:
downloadbtn.setData(pathlist2.get(index));
downloadbtn.setText(myResourceBundle.getString("downloadbtn.text"));
But then you have to make sure to call setText always after setData.
The library is Open Source and is available from Maven Central:
<dependency>
<groupId>org.drombler.commons</groupId>
<artifactId>drombler-commons-fx-core</artifactId>
<version>0.4</version>
</dependency>

How to open a folder/Directory in Java

I have a TilePane with a imageView items, each imageview displaying an image got from a directory in my pc. When any of the images in the tilePane is clicked a message is printed onto console with the direcory path address to the folder where the image resides, for example:
You clicked: ImageResources/wp.png
I would like to extend this further so that when a particular image is clicked the folder in which the image resides opens.
My implementation below only prints to console the message below, but no directory/ folder gets opened. The message is:
File Not Found
How can I get it to work so that the folder|directory opens? Thank you all in advance.
Also, of the directory could open with the clicked image selected, then that would be an extra, but is not a priority right now.
My implementation so far goes as follows:
public class TilePaneExample extends Application {
#Override
public void start(Stage primaryStage) {
VBox root = new VBox(30);
String[] imageResources = new String[]{
//loading images
"ImageResources/facebook.png",
"ImageResources/faviicon.png",
"ImageResources/jquery-logo.png",
"ImageResources/linkedin_32.png",
"ImageResources/loading1.png",
"ImageResources/twitter.png",
"ImageResources/twitter_32.png",
"ImageResources/wp.png",};
// Pane
TilePane tilePane = new TilePane();
tilePane.setHgap(5);
tilePane.setVgap(5);
for (final String imageResource : imageResources) {
Image image = new Image(getClass().getResourceAsStream(imageResource));
ImageView imageView = new ImageView(image);
imageView.setOnMouseClicked(new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
File f = new File(imageResource);
String absolutePath = f.getAbsolutePath();
String folderPath = absolutePath.
substring(0, absolutePath.lastIndexOf(File.separator));
try {
Desktop.getDesktop().open(new File(folderPath));
} catch (IllegalArgumentException iae) {
System.out.println("File Not Found");
} catch (IOException ex) {
Logger.getLogger(TilePaneExample.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
tilePane.getChildren().add(imageView);
}
root.getChildren().addAll(tilePane);
primaryStage.setTitle("TilePane Example");
Scene scene = new Scene(root, 300, 150);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}

For example, clicking the second image, "ImageResources/faviicon.png", prints its folder path as D:\standAloneDev\java\workingDir\Jive\TilePaneExample\ImageResources

SWT Drag to Explorer (Windows) or Finder (OS X)

I've got an SWT application with a bunch of graphical elements. I'd like for the user to be able to drag an element to their Desktop / Windows Explorer / OS X Finder. When they drop the element, I need the path that they dropped it to, so that I can create a file in that location which represents the element.
I don't think I can use a FileTransfer, because there is no source file. There is a source object which can create a file, but only once it knows where to put it.
Inlined below is a simple example of what I'm trying to achieve, there is a text box with a label to drag from. If the user drags to some folder or file, I'd like to get the path that they dragged to. If they dragged to a file, I'd like to replace the contents of that file with whatever is in the text box. If they dragged to a folder, I'd like to create a file called "TestFile" with the contents of whatever is in the text box.
import org.eclipse.swt.SWT;
import org.eclipse.swt.dnd.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class DesktopDragExample {
public static void main(String[] args) {
// put together the SWT main loop
final Display display = Display.getDefault();
display.syncExec(new Runnable() {
#Override
public void run() {
Shell shell = new Shell(display, SWT.SHELL_TRIM);
initializeGui(shell);
//open the shell
shell.open();
//run the event loop
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
});
}
// create the gui
private static void initializeGui(Composite parent) {
GridLayout layout = new GridLayout(2, false);
parent.setLayout(layout);
// make the instructions label
Label infoLbl = new Label(parent, SWT.WRAP);
GridData gd = new GridData();
gd.grabExcessHorizontalSpace = true;
gd.horizontalAlignment = SWT.FILL;
gd.horizontalSpan = 2;
infoLbl.setLayoutData(gd);
infoLbl.setText(
"You should be able to drag to the desktop, Windows Explorer, or OS X Finder.\n" +
"If you drag to a file, it will replace the contents of that file with the contents of the text box.\n" +
"If you drag to a folder, it will create a file named 'TestFile' whose contents are whatever is in the text box.");
// make the text element
final Text text = new Text(parent, SWT.SINGLE | SWT.BORDER);
gd = new GridData();
gd.grabExcessHorizontalSpace = true;
gd.horizontalAlignment = SWT.FILL;
text.setLayoutData(gd);
// make the label element
Label label = new Label(parent, SWT.NONE);
label.setText("Drag me");
// listener for drags
DragSourceListener dragListener = new DragSourceListener() {
#Override
public void dragStart(DragSourceEvent e) {
e.detail = DND.DROP_COPY;
}
#Override
public void dragFinished(DragSourceEvent e) {
System.out.println("--dragFinished--");
System.out.println("e.data=" + e.data);
}
#Override
public void dragSetData(DragSourceEvent e) {
System.out.println("--dragSetData--");
System.out.println("e.data=" + e.data);
}
};
// the DragSource
DragSource dragSource = new DragSource(label, DND.DROP_COPY);
dragSource.setTransfer(new Transfer[]{FileTransfer.getInstance()});
dragSource.addDragListener(dragListener);
}
private static void draggedTo(String path, String textBoxContents) {
System.out.println("Dragged the contents '" + textBoxContents + "' to '" + path + "'");
}
}
Here are some other people with the same problem, but looks like no solution so far:
Drag from SWT to Desktop, ..want destination path as String

The only way to do it is by creating a temporary file and then using the FileTransfer. I suspect that's what you'd have to do in native code anyways. I'll see if I have enough time to sketch the sample...

You don't get the file location from and write the file yourself. Dragging to the Desktop implies a FileTransfer (you can check what type of transfer is supported in dragSetData).
This means that SWT expecting a String[] of file paths in DragSourceEvent.data. If you set this in the dragSetData method, then SWT copies those files to your drop target - e.g. the Desktop.
#Override
public void dragSetData(DragSourceEvent e) {
System.out.println("--dragSetData--");
System.out.println("Is supported: " + FileTransfer.getInstance().isSupportedType(e.dataType));
FileTransfer f = FileTransfer.getInstance();
String[] filePaths = {"C:\\CamelOut\\4.xml" } ;
e.data = filePaths;
}
};