Develop Reference

Why does my ImageView work on Windows but not on Mac

Here is the simple code for javafx in intellij:
Image image = new Image(url);
ImageView imageView = new ImageView(image);
movieBox.getChildren().add(imageView);
//checking
System.out.println(imageView.getImage().getUrl());
Textfield tx = new Textfield();
tx.setText("hi");
movieBox.getChildren().add(tx);
I copied the project over to intellij on my mac and everything works accept the images won't show. Here are the things I tried:
Checking that the URL is valid by printing out the imageview image url. It prints out a valid URL of an image i can open in my browswer
Adding a random textfield to the movieBox (a flowpane object) to make sure it works. And it does.
There shouldn't be any error in the code because it works in my windows intellij. It seems like a problem with the environment, but I haven't even got a clue how should i approach this problem. Any sort of advice will be nice, thanks!

Try downloading the image and using the path to the image on your disk, if it works then the problem will be with the url, otherwise its with the ImageView. If the problem is with the URL, post the one you are trying to use so the community can test it, and try another URL.
P.S. If you aren't manipulating the image you can just pass the path/url directly top the ImageView constructor.
public ImageView(String url)
Allocates a new ImageView object with image loaded from the specified URL.
The new ImageView(url) has the same effect as new ImageView(new Image(url)).

Relative URL not working in javafx

I would like to put an image on a Label, and the codes are:
Label userPic = new label();
ImageView userImage = new ImageView(
new Image("test/123/headPortrait.png",50.0,50.0,false,false));
userPic.setGraphic(userImage);
But it continually throws java.lang.IllegalArgumentException: Invalid URL or resource not found.
And I've tried file://headPortrait.png, file://E:/eclipse/ClassSchedule/headPortrait.png(the absolute URL). This time the compiler did not throw any exception, but the image still won't show up and the application runs very slowly.
Before I tried to add an image to the label, all of my code had worked perfectly.

It's not good pratice to put an ImageView into a label. I would recommend to you that you add the ImageView to your scene directly.
To load an Image in the classpath the best way to do that would be using a ResourceStream,
this.getClass().getResourceAsStream("/assets/headPortrait.png")
as example. In this case your image must be in a folder called assets.
Your whole code could look like this:
ImageView imageView = new ImageView(new Image(this.getClass().getResourceAsStream("/assets/headPortrait.png"), 50, 50, false, true));
I would recommend to you to set the last boolean flag of the Image constructor to true, because it increases the quality of the image.

Cannot create image from getResourceAsStream() in JavaFX projects

I cannot create an image in any of my JavaFX projects using the following kind of code:
final String url = "line.jpg";
Image image = new Image(Config.class.getResourceAsStream(url));
because there is always a null pointer exception pointing to the second line. Obviously, I have checked that the image file is in the correct directory. I have tried example programs, some directly copied from these boards, but these also fail for the same reason.
I suspect I lack a resource in Netbeans or JavaFX but I can't figure out what is missing.

The only workaround appears to be to include the image file in a css stylesheet and link it to the program by setting the gui components id like this:
Button homeButton = new Button();
homeButton.setId("homebutton");
In the stylesheet there is:
#homebutton {
-fx-background-image: url("images/homebtn.jpg");
-fx-pref-width: 30;
-fx-pref-height: 30;
}
Its not ideal being forced into this solution and Swing seems far better at dealing with image files. I assume a bug in JavaFX that always causes the following to fail:
Image image = new Image(Config.class.getResourceAsStream(url));

How can I create animated gif in Java?

I would like to create a gif image from the set of BufferedImages. How can I do this? Is there such library in pure Java (ImageMagick is not an option)? I've found Gif4J library but it's not royality-free.

I just answer a similar question here, but I think that my solution can help.
'ImageIcon' class allows you to load gif animations. I load the image with 'getResource()'. For doing this I normally us URL class to pass the file path. The path does not need to be necessary in a remote machine as the name URL may suggest.
URL url = This.class.getResource(path);
Icon myImgIcon = new ImageIcon(url);
JLabel imageLbl = new JLabel(myImgIcon);
component.add(imageLbl, BorderLayout.CENTER);
path will be the path of the gif inside of the class folder.
References:
http://docs.oracle.com/javase/tutorial/uiswing/components/icon.html#getresource

There is an image processing library, akin to Picasso which uses the very same AnimatedGifEncoder class mentioned by Lifelogger-
Glide Docs, Glide
AnimatedGifEncoder e = new AnimatedGifEncoder();
e.start(outputFileName);
e.setDelay(1000); // 1 frame per sec
e.addFrame(image1);
e.addFrame(image2);
e.finish();

Get image from relative path

In my project I have 2 packages.
images - contain images and
notification - contain java files
In notification/main.java I get Image object from image using this code
Image image = Toolkit.getDefaultToolkit().getImage("/images/key-16x16.png");
and I can't get image.
How can I fix this bug.

I'm using Netbeans to develop Java desktop application and I have solved my problem.
Image image = new ImageIcon(this.getClass().getResource("/images/bell-icon16.png")).getImage();
"this" is a class extends JFrame

/ means an absolute path, save Java web-apps where / means relative to context. So, I would suggest to use relative URL, means get rid of that / in front, and then provide the right path.
In case, even then you can't solve it, try to create a file on the same path you are looking for image. This way you will know that where you are looking exactly and where you should look.

You could also try
Image image = new ImageIcon(path).getImage();

Incase the solution above doesn't work, try this (which worked for me):
Image image = Toolkit.getDefaultToolkit().createImage(this.getClass().getResource("/Images/bell-icon16.png"));

i've also been on this and it turns out that you need to create a package inside of your src folder.
for instace if you create a package called images inside of the src folder, your relative path will be
/images/yourimage.png.
Notice that the slash(/) must be there!
more info here http://forums.macrumors.com/showthread.php?t=533922
it worked for me

Toolkit tk = Toolkit.getDefaultToolkit();
Class<? extends JFrame> j = YOURJFRAME.getClass();
Image image = tk.createImage(j.getResource("/images/bell-icon16.png"));
Try that code, if you have a JFrame that will work.
If you have an Applet, then just use
Toolkit tk = Toolkit.getDefaultToolkit();
Image image = tk.createImage("images/bell-icon16.png");
With applets you never want to use the / in the beginning, but if you have a JFrame, and you are using getResource, you need the / in the beginning of the Path.

SwingResourceManager.getImage(YourClass.class,"key-16x16.png");
The getIcon method will return Icon as similar

setIconImage(Toolkit.getDefaultToolkit().getImage(getClass().getResource("../resources/MainIcon.png")));