Develop Reference

How can I specify the icon's path if icon doesn't have a specified address?

I have a frame and want to set an icon for it. I use this code : JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setLayout(null); f.setTitle("add icon example"); f.setBounds(200,200,200,200); Image icon = Toolkit.getDefaultToolkit().getImage("D:\\icon.png"); f.setIconImage(icon); f.setVisible(true); In this code , the address of image is specific , but what can I do if image and jar file are in a zip file and icon will be with jar file. I think I can write a code to unzip the file and then save the image in a specified address and then use it. But , please anyone help me to do it. Thanks.

The answer is something like
BufferedImage im = ImageIO.read(myClass.getResourceAsString("iconName"));

If you're trying to load an image that's within a JAR, this is the most simple approach to this problem. This will also work if your jar is executed from within a zip archive.
BufferedImage image = ImageIO.read(MyClass.class.getClassLoader().getResourceAsStream("image_name.png"));
Where MyClass is the name of the class you're calling this code from.

How do I add an image to JPanel using imageicon (Java GUI)?

I looked all over the place but I am still stuck on how directory works to find the image to put onto the JPanel. Where is the image supposed to be? I clicked on properties for my image and it shows Location: C:\Users\Joseph\Pictures\Background and the picture's name is random.jpg.
I am trying to add an image to a tab using tabbedPane. Here is what I have so far, and I am not able to do it.
JPanel flPanel = new JPanel();
flPanel.setLayout(new FlowLayout());
ImageIcon image = new ImageIcon(getClass().getResource(""));
// Tried /Users/Joseph/Pictures/Background/random.jpg and doesn't work
JLabel j1 = new JLabel(image);
flPanel.add(j1);
tabbedPane.add("Tab 2", flPanel);
Is the picture supposed to be in the same package file as the project? Or is it supposed to be in the source file to be able to just do "random.jpg"?

If you want the image to be available to your application at runtime, then you should consider making sure that the image is included within your Jar when you application is built.
From the sounds of it, you are using Netbeans, you should copy the image to a directory within your src directory of your project.
You should then be able to use...
BufferedImage bi = ImageIO.read(getClass().getResource("/full/path/to/image/random.jpg"));
ImageIcon image = new ImageIcon(bi);
The path to the image should be the full path (from the context of the src directory) within your project.
That is, if you placed the image in the resources directory within the src directory, then you would use /resources/random.jpg as the path/file name
Take a look at Reading/Loading an Image for more details

getClass().getResource(...) will only get resources inside the classpath.
You can use ImageIO.read(File) like this:
BufferedImage bi = ImageIO.read(new File("C:\\Users\\Joseph\\Pictures\\Background\random.jpg"))
ImageIcon image = new ImageIcon(bi);

how to display image using its path

i have a the path of an image in a string i want to display it on a jlabel using the path. please help me.
if(!ar.get(16).equals("empty")){
String photo=(String)ar.get(16);
System.out.println(photo);
// if(!photo.equals(""))
// pic.setText(photo);
Image image=Toolkit.getDefaultToolkit().getImage(photo);;
ImageIcon img=new ImageIcon(image.getScaledInstance(view.jLabel5.getWidth(), view.jLabel5.getHeight(), 0));
//JpegReader jrdr=new JpegReader();
//view.jLabel5.setSize(img, image.getWidth());
view.jLabel5.setPreferredSize(new Dimension(100, 100));
view.jLabel5.setIcon(img);
}

If the image is an embedded resources (ie lives within the application context/is bundled with the application Jar), then you need to use getResource to gain access to it..
Toolkit.getDefaultToolkit().getImage expects that the String passed to it is a file on the file system.
If the image is embedded, then you will need to use something more like...
Toolkit.getDefaultToolkit().getImage(getClass().getResource(photo))
To load it.
If the image is being loaded from the file system, you could use
File file = new File(photo);
if (file.exists()) {
// Attempt to load the image
} else {
// Show error message.
}
Because of the way Toolkit#getImage works, it will not provide any details if the image fails to load for some reason.
Instead, you should be using ImageIO, which will throw an IOException if it was unable to load the image for some reason...
BufferedImage img = ImageIO.read(getClass().getResource(photo));
or
BufferedImage img = ImageIO.read(new File(photo));
Depending on where the image is located.
Take a look at Reading/Loading an Image.
You should also avoid calling setPreferredSize explicitly and simply allow JLabel to make it's own choices...

Put the image file in the project. Under a seperate folder.
ImageIcon image = new ImageIcon(this.getClass().getResource("/images/abc.jpg"));
JLabel imageLabel = new JLabel(image, JLabel.CENTER);
If you want to load the image for any other location on your computer then,
ImageIcon image = new ImageIcon("C:/images/image.png");
JLabel imagelabel = new JLabel(image);

Make sure your paths are correct. If you photo string path is "photo.jpeg", your path should look something like this
ProjectRoot
photo.jpeg
src
If you want to put the photo.jpeg in a directory images, you should use "images/photo.jpeg"
ProjectRoot
images
photo.jpeg
src
This is considering you're using an IDE like Netbeans or Ecplise.

Not sure about image on JButton

I have already tried the following =
ImageIcon clear = new ImageIcon ("icons\delete1.png");
JButton clearBT = new JButton(clear);
And it works perfectly, I just have a question to make. The directory of the image is into my hard disk, but I want to deliver my project to my professor, so I am not sure if the image will still show up when in his computer. The thing is that I am not sure if the directory that I've put in my code (which exactly is "C:\\Users\\George\\Desktop\Giorgos\\icons\\delete1.png") will have something to show on my professor's pc.
Thank you in advantage for your answers, and if I am not clear enough, I am willing to rephrase.

If icons folder is in project directory folder and in code you are calling the image with :
ImageIcon clear = new ImageIcon ("icons\delete1.png");
And It's working perfectly ,then It will work anywhere.
Just Make sure you are not calling the image location address as its complete address that is referring to your computer hard disk.

If Your Professor's PC has internet access then you can use something like
(Please upload your file somewhere on internet like imgur and pass that url of your image new URL(here))
URL lenna =
new URL("http://upload.wikimedia.org/wikipedia/en/2/24/Lenna.png");
ImageIcon clear = new ImageIcon (URL);
JButton clearBT = new JButton(clear);

Put the picture in you projects and you will have to change your code to
JButton clearBT = new JButton(new ImageIcon(getClass().getResource(image_path)));

Another option would be to ship the image bundled with your source code. For instance, create a "package" / directory inside your project hierarchy and store images there.
Then, you can load them this way:
ImageIcon image = new ImageIcon(getClass().getResource("/path/to/the/image");
For instance, if the image is under org/example/program then the above will be:
ImageIcon image = new ImageIcon(getClass().getResource("/org/example/program/image.png");

Java Swing: ImageIcon not appearing in eclipse?

I am designing a GUI. I have created a Menubar and added Menu items to Menu and Have setMenubar.
My problem is i am not able to add an icon (icon is not appearing in eclipse) to the Menuitem.
This is how I did:
I have my .png file in D:/something/src/resources/new.png
JMenuBar menuBar = new JMenuBar();
JMenu File = new JMenu("File");
menuBar.add(File);
java.net.URL imageURL = this.getClass().getResource("/resources/new.png");
System.out.println(imageURL); //imageURL is printing correctly in console
ImageIcon im = new ImageIcon(imageURL);
JMenuItem newItem = new JMenuItem("New", im);
File.add(newItem);
setJMenuBar(menuBar);
I am facing the similar problem adding icon to a button in Toolbar too. Guess, it is same cause. Could anyone please tell me what I am doing wrong.
Note: I have tried with .jpg, .jpeg and .ico files too. But nothing is appearing in eclipse!. I am using Windows & MS Access database.

A file in resources would typically end up at the root of a Jar. Try:
java.net.URL imageURL = this.getClass().getResource("/new.png");
If that fails for you, expand the Jar and check the image is located where you think it is.

Hopefully the resources folder, is the Source Folder that you had created by right clicking your Project. So you can use this also to retrieve images.
URL url = ClassLoader.getSystemResource(path);
where path = "new.png"
Or as quoted by you :
"This is how I did: I have my .png file in D:/something/src/resources/new.png"
Try to change the location of the resources folder inside classes/bin folder instead of src. So it must look like this D:/something/classes/resources/new.png
Now if you will use
URL url = ClassLoader.getSystemResource(path);
then path = "resources/new.png";
Then i guess your way of doing will run too.
Hopefully this might help you in some way.
Regards.