I have added an icon to my JButton and the image is taken from a specific path inside my project files. But the problem is on another machine the path may be slightly different.
For instance my entire image path is home/jon/hello/folder/image.png, but on another machine the path may be /project/folder/william/hello/folder/image.png. Meaning the starting part of the path is different but from the hello part would be the same.
How can I make my path in my button code to be able to match the difference? My button code is below :
btn = new JButton(BUTTON_COLLAPSE_NESTED().toString());
btn.setIcon(newImageIcon("home/jon/hello/folder/image.png"));
btn.setActionCommand(BUTTON_COLLAPSE_NESTED().toString());
btn.addActionListener(btnListener);
btnPnl.add(btn);
This is why you shouldn't use absolute paths. Place the image in the jar, and use relative paths to resources, with the path based on the classpath to your class files.
For instance, if image.png is located in an images folder just off of the class file folder, you'd do something like:
URL url = getClass().getResource("/images/image.png");
BufferedImage img = ImageIO.read(url);
ImageIcon icon = new ImageIcon(img);
or something similar.
Related
I am ending my project and I want to add some photos as Icons.
This project is in Maven.
I just dont know how to get path correctly. I tried all possible paths.
JLabel fLabel = new JLabel("Text");
fLabel.setBounds(375,5,50,50);
ImageIcon icon = new ImageIcon(".//resources/flag.png");
fLabel.setIcon(icon);
this.add(fLabel);
the content of the src/main/resources/ directory from Maven is directly added to the class path of your compiled jar.
So it should work with directly addressing the file without a path.
ImageIcon icon = new ImageIcon("flag.png");
Your images are in the correct directory.
In your code, instead of passing the path, pass the URL instead as following:
var flagIconUrl = this.getClass().getClassLoader().getResource("flag.png");
var icon = new ImageIcon(flagIconUrl);
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);
I know there are a thousand answers on the message boards to this question, and I have tried them all and none of them have worked for whatever reason. Here is an excerpt from my code:
ImageIcon icon = new ImageIcon("/home/james/programmingpics/A_Flute");
ImageIcon icon1 = new ImageIcon("/home/james/programmingpics/C_D_Flute");
ImageIcon icon2 = new ImageIcon("/home/james/programmingpics/D_E_Flute");
ImageIcon icon3 = new ImageIcon("/home/james/programmingpics/E_Flute");
ImageIcon icon4 = new ImageIcon("/home/james/programmingpics/F_G_Flute");
ImageIcon icon5 = new ImageIcon("/home/james/programmingpics/G_Flute");
ImageIcon icon6 = new ImageIcon("/home/james/programmingpics/B_Flute");
ImageIcon icon7 = new ImageIcon("/home/james/programmingpics/C_Flute");
ImageIcon icon8 = new ImageIcon("/home/james/programmingpics/D_Flute");
ImageIcon icon9 = new ImageIcon("/home/james/programmingpics/F_Flute");
pretty simple, works perfect while it is on my computer. Whenever I zip the dist folder move the pictures out of the directory on my computer and run the program, I get back empty JFrame's. So I then did the project/properties/sources/add folder thing, compiled it and still the same result. Then I moved the classes folder into the dist folder, tried to change the path and see if that worked, still nothing. It sounds like there is a simple answer to this, but I have clearly missed it.
You use absolute path names in the constructors. Examples of absolute path names are "/home/myusername/folder/foo/bar.png" or "C:\Folder\Graphics\foo\bar.png".
Your code given in your posting always wants to read exactly from the given path at runtime. If you move the graphics to a different folder, you're program won't be able to find them. This way, the graphics aren't included/packed into your program, but they're loaded at runtime (not compile time!) from the path specified in the constructor.
Such absolute paths are very bad practice because they prevent your program from being portable. Other people won't be able to run your program on their computers. Because if you try to run that on a different machine, the code will probably fail, because the path "/home/james/..." might not exist on that computer. Maybe your user doesn't even use Linux or at least his user name is not "james".
So you have to get rid of the absolute paths. Instead, you should take care to include your graphics in your project and have them being put into the JAR archive.
One approach would be putting your graphics into your project's directory structure and then doing something like this:
URL imageURL = getClass().getClassLoader().getResource("images/A_Flute.png");
ImageIcon fluteIcon = new ImageIcon(imageURL);
This, of course, won't work if your graphics stay in your home folder. You have to copy the graphics.
I have a Java project called MyProject. I have a few different packages (keeping names simple for the purpose of this question), as follows:
src/PackageA
src/PackageA/PackageAa
src/PackageA/PackageAa/PackageAaa
src/PackageB
src/PackageB/PackageBa
src/PackageB/PackageBa/PackageBaa
I have a class
src/PackageA/PackageAa/PackageAaa/MyJavaFile.java
And I have an image
src/PackageB/PackageBa/PackageBaa/MyImage.png
Inside of MyJavaFile.java, I would like to declare an Image oject of MyImage.png
Image img = new Image(....what goes here?...)
How can I do this?
You could either call Class.getResource and specify a path starting with /, or ClassLoader.getResource and not bother with the /:
URL resource = MyJavaFile.class
.getResource("/PackageB/PackageBa/PackageBaa/MyImage.png");
or:
URL resource = MyJavaFile.class.getClassLoader()
.getResource("PackageB/PackageBa/PackageBaa/MyImage.png");
Basically Class.getResource will allow you to specify a resource relative to the class, but I don't think it allows you to use ".." etc for directory navigation.
Of course, if you know of a class in the right package, you can just use:
URL resource = SomeClassInPackageBaa.class.getResource("MyImage.png");
(I'm assuming you can pass a URL to the Image constructor in question. There's also getResourceAsStream on both Class and ClassLoader.)
you can use relative path since the the relative path is project folder.
ImageIcon img = new ImageIcon("src/PackageB/PackageBa/PackageBaa/MyImage.png");
/folderB/folderBa/folderBaa/MyImage.png
The image can stored into a project folder location .eg: /images/MyImage.png
Then try:
Image img = new Image(/images/MyImage.png);
Using a file path is not possible when running a program that's in a jar file, especially if the program is being loaded as an applet or WebStart application then you can use ClassLoader to get image.
use the following code to load the images:
ClassLoader cldr = this.getClass().getClassLoader();
java.net.URL imageURL = cldr.getResource("/PackageB/PackageBa/PackageBaa/MyImage.png");
ImageIcon aceOfDiamonds = new ImageIcon(imageURL);
This IS the best way to handle all images and icons in a JAR App.
Once you've zipped up all of your images and icons into its own JAR file - Configure your build path by adding the images JAR file into your libraries tab so that its now included in your classpath.
Then simply use the following 3x lines of code at the start of your constuctor to access any image you need for anything including a SystemTray image which doesn't accept the simple ImageIcon's as its main icon (weird I know). The 3x lines are:
URL iconUrl = this.getClass().getResource("/image-iconb.png");
Toolkit tk = this.getToolkit();
imageIcon = tk.getImage(iconUrl);
(imageIcon is just a constructor declared Image variable)
Now you can set a window icon as simply as:
setIconImage(imageIcon );
and at the same time use the same variable when setting the System TrayIcon by declaring:
trayIcon = new TrayIcon(imageIcon, "SystemTray Demo", popupMenu);
The above allows you to declare Images or ImageIcons easily and centrally without running the risk of not keeping image resources in the right place. It keeps it nice and tidy, with the JAR containing all your images automatically compiled at run time and distribution of your program.
As a bonus, once the JAR is registered in your classpath - you can keep adding any other images into the same JAR at any time without any fuss too - Everything just works and the added images are instantly available to your app.
Much better in my view.
Use the getResource method to read resources inside the src root. For example, the following code retrieves images from a folder src/images.
// Get current classloader
ClassLoader cl = this.getClass().getClassLoader();
// Create icons
Icon saveIcon = new ImageIcon(cl.getResource("images/save.gif"));
Icon cutIcon = new ImageIcon(cl.getResource("images/cut.gif"));
The example assumes that the following entries exist in the application's JAR file:
images/save.gif
images/cut.gif
Image img = new Image("./src/PackageB/PackageBa/PackageBaa/MyImage.png");
This shall go the path of the image is first inside src (source) then package so the program would access the image this way.
I'm making a torpedo game for school in java with swing gui, please see the zipped source HERE.
I use custom button icons and mouse cursors of images stored in the /bin/resource/graphics/default folder's subfolders, where the root folder is the program's root folder (it will be the root in the final .jar as well I suppose) which apart from "bin" contains a "main" folder with all the classes. The relative path of the resources is stored in MapStruct.java's shipPath and mapPath variables.
Now Battlefield.java's PutPanel class finds them all right and sets up its buttons' icons fine, but every other class fail to get their icons, e.g. Table.java's setCursor, which should set the mouse cursor for all its elements for the selected ship's image or Field.java's this.button.setIcon(icon); in the constructor, which should set the icon for the buttons of the "water".
I watched with debug what happens, and the images stay null after loading, though the paths seem to be correct. I've also tried to write a test file in the image folder but the method returns a filenotfound exception. I've tried to get the path of the class to see if it runs from the supposed place and it seems it does, so I really can't find the problem now.
Could anyone please help me?
Thank you.
You need to load icons like this:
ClassLoader cl= this.getClass().getClassLoader();
URL imageURL = cl.getResource("resources/...");
ImageIcon icon = new ImageIcon(imageURL);
And you need to add your resource folder to the classpath in Eclipse. Note that the path is not a file path, this way it will work if you decide to bundle your app in a jar file.
btnRegistration.setIcon(createImageIcon("reg.png"));
protected ImageIcon createImageIcon(String path) {
java.net.URL imgURL = Master.class.getClassLoader().getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.out.println("Couldn't find file: " + path);
return null;
}
}
here btnRegistration is my JButton
Master is my Class
and reg.png is my image that is belong in my project