I am using eclipse and I use the following code to load my image from a folder.
getClass().getResource("/images/image.jpg").getFile())
The image folder is located inside the bin folder in the project folder. It works fine when loading in eclipse, but when I export it to a jar it does not load. I have tried puting the image folder in all possible places in the jar, but it does not.
How do I load an image folder in a jar?
You can use getResourceAsStream() method instead to get InputStream instance with your file data.
UPDATE: Loading of files from a jar happens with the help of class loader. And it can give you instance of InputStream (not FileInputStream) of any internal resource (be it image file or sound file or text file). File writing shouldn't work inside jar.
Use this. This method doesn't return immediately.
public Image getImage(String img){
return new ImageIcon(getClass().getResource(img)).getImage();
}
If you want to load from the root of the JAR, then
return new ImageIcon(getClass().getClassLoader().getResources(img)).getImage();
Related
When running a Java app from eclipse my ImageIcon shows up just fine.
But after creating a jar the path to the image obviously gets screwed up.
Is there a way to extract an image from the jar at runtime so I can then open it up? Or, is there a better way to do this?
I'd like to distribute a single jar file if possible.
To create an ImageIcon from an image file within the same jars your code is loaded:
new javax.swing.ImageIcon(getClass().getResource("myimage.jpeg"))
Class.getResource returns a URL of a resource (or null!). ImageIcon has a constructors that load from a URL.
To construct a URL for a resource in a jar not on your "classpath", see the documentation for java.net.JarURLConnection.
You can try something like:
InputStream stream = this.getClass().getClassLoader().getResourceAsStream("/images/image.jpg");
In your JAR file, you might have a directory structure of:
MyJAR.jar
- com (class files in here)
- images
----image.jpg
This is working for me to load and set the content pane background image:
jar (or build path) contains:
- com
- img
---- bg.png
java contains:
JFrame f = new JFrame("Testing load resource from jar");
try {
BufferedImage bg = ImageIO.read(getClass().getResource("/img/bg.png"));
f.setContentPane(new ImagePanel(bg));
} catch (IOException e) {
e.printStackTrace();
}
Tested and working in both jar and unjarred (is that the technical term) execution.
BTW getClass().getClassLoader().getResourceAsStream("/img/bg.png") - which I tried first - returned me a null InputStream.
In netbeans 8.1 what I've done is to include the folder of icons and other images called Resources inside the src folder in the project file. So whenever i build Jar file the folder is included there.The file tree should be like this:
src (Java files in source packges are here)
** PACKAGE YOU NAMED IN PROJECT**
file.java
Resources
image.jpg
The code should be like:
jToggleButton1.setIcon(new javax.swing.ImageIcon(this.getClass().getResource("/resources/image.jpg")));
Load image in from Jar file during run time is the same as loading image when executed from IDE e.g netbeans the difference is that when loading image from JAR file the path must be correct and its case sensitive (very important).
This works for me
image1 = new javax.swing.ImageIcon(getClass().getResource("/Pictures/firstgame/habitat1.jpg"));
img = image1.getImage().getScaledInstance(lblhabitat1.getWidth(), lblhabitat1.getHeight(), Image.SCALE_SMOOTH);
lblhabitat1.setIcon(new ImageIcon(img));
if p in "/Pictures/firstgame/habitat1.jpg" is in lower case it wont work. check spaces, cases and spelling
When running a Java app from eclipse my ImageIcon shows up just fine.
But after creating a jar the path to the image obviously gets screwed up.
Is there a way to extract an image from the jar at runtime so I can then open it up? Or, is there a better way to do this?
I'd like to distribute a single jar file if possible.
To create an ImageIcon from an image file within the same jars your code is loaded:
new javax.swing.ImageIcon(getClass().getResource("myimage.jpeg"))
Class.getResource returns a URL of a resource (or null!). ImageIcon has a constructors that load from a URL.
To construct a URL for a resource in a jar not on your "classpath", see the documentation for java.net.JarURLConnection.
You can try something like:
InputStream stream = this.getClass().getClassLoader().getResourceAsStream("/images/image.jpg");
In your JAR file, you might have a directory structure of:
MyJAR.jar
- com (class files in here)
- images
----image.jpg
This is working for me to load and set the content pane background image:
jar (or build path) contains:
- com
- img
---- bg.png
java contains:
JFrame f = new JFrame("Testing load resource from jar");
try {
BufferedImage bg = ImageIO.read(getClass().getResource("/img/bg.png"));
f.setContentPane(new ImagePanel(bg));
} catch (IOException e) {
e.printStackTrace();
}
Tested and working in both jar and unjarred (is that the technical term) execution.
BTW getClass().getClassLoader().getResourceAsStream("/img/bg.png") - which I tried first - returned me a null InputStream.
In netbeans 8.1 what I've done is to include the folder of icons and other images called Resources inside the src folder in the project file. So whenever i build Jar file the folder is included there.The file tree should be like this:
src (Java files in source packges are here)
** PACKAGE YOU NAMED IN PROJECT**
file.java
Resources
image.jpg
The code should be like:
jToggleButton1.setIcon(new javax.swing.ImageIcon(this.getClass().getResource("/resources/image.jpg")));
Load image in from Jar file during run time is the same as loading image when executed from IDE e.g netbeans the difference is that when loading image from JAR file the path must be correct and its case sensitive (very important).
This works for me
image1 = new javax.swing.ImageIcon(getClass().getResource("/Pictures/firstgame/habitat1.jpg"));
img = image1.getImage().getScaledInstance(lblhabitat1.getWidth(), lblhabitat1.getHeight(), Image.SCALE_SMOOTH);
lblhabitat1.setIcon(new ImageIcon(img));
if p in "/Pictures/firstgame/habitat1.jpg" is in lower case it wont work. check spaces, cases and spelling
To give path to a resource eg:- image, in javafx, we can do as :-
ImageView imgView_btnEndCall = new ImageView(new Image("/clientgui/image/callend.png"));
But to give path to a resource in swing, the following code works
FileInputStream fis = new FileInputStream("src/soundtest/sound/sound.wav");
The difference I found is necessity to put 'src' in swing. And when I run the jar file from dist folder, swing program doesnt work but javafx program works. Problem is because the jarfile compress the project including all the packages and files. When javafx program tries to access some resource, it is able to access, callend.png file inside image folder inside clientgui folder. But swing application cant access as we have given 'src' folder in the code. How to solve the problem. How to include the resource directory in swing so that the jar file can access the resource.
Don't use FileInputStream, use the ClassLoader, e.g.
getClass().getResourceAsStream("sound/sound.wav");
getResouceAsStream() javadoc
This will load the file from the directory structure contained in your jar. The src folders won't exist anymore when the jar is created, they will be an embedded resource (thanks #AndrewThompson for the buzzword).
Read more in this question: Embedding resources (images, sound bits, etc) into a Java project then use those resources
Well thanks to durron597, my code worked. As I mentioned in my question, the problem was jar file doesnt have src folder and can't access the resource as I mentioned in my question. Taking the resource using ClassLoader solved the problem. Here is my final code
AudioStream audio = new AudioStream(getClass().getResourceAsStream("sound/sound.wav"));
AudioPlayer.player.start(audio);
Here, package name is soundtest and inside that package, there is another folder called sound which has a wav file sound.wav
soundtest
|-sound
|-sound.wav
I've just a finished a program which makes use of lots of audio and image files. These are included in the project in src in the folder audio and images respectively. When I reference them I use use:
ImageIO.read(aclass.class.getResource(images/animage.png));
for images (referencing images directly)
or
FileInputStream fis = new FileInputStream(src/audio/audio.wav);
for audio (reference audio from the src file)
However, when I clean and build the project and then try and run it as a jar most of assets are gone. Some of the images remain but I lose all audio.
Is there a way I can make sure that all these assets get loaded when I just run the exported jar?
to load the resources inside the jar file you have to use the YourClass.class.getResourceAsStream method. it will return an input stream. should be self explainatory
When running a Java app from eclipse my ImageIcon shows up just fine.
But after creating a jar the path to the image obviously gets screwed up.
Is there a way to extract an image from the jar at runtime so I can then open it up? Or, is there a better way to do this?
I'd like to distribute a single jar file if possible.
To create an ImageIcon from an image file within the same jars your code is loaded:
new javax.swing.ImageIcon(getClass().getResource("myimage.jpeg"))
Class.getResource returns a URL of a resource (or null!). ImageIcon has a constructors that load from a URL.
To construct a URL for a resource in a jar not on your "classpath", see the documentation for java.net.JarURLConnection.
You can try something like:
InputStream stream = this.getClass().getClassLoader().getResourceAsStream("/images/image.jpg");
In your JAR file, you might have a directory structure of:
MyJAR.jar
- com (class files in here)
- images
----image.jpg
This is working for me to load and set the content pane background image:
jar (or build path) contains:
- com
- img
---- bg.png
java contains:
JFrame f = new JFrame("Testing load resource from jar");
try {
BufferedImage bg = ImageIO.read(getClass().getResource("/img/bg.png"));
f.setContentPane(new ImagePanel(bg));
} catch (IOException e) {
e.printStackTrace();
}
Tested and working in both jar and unjarred (is that the technical term) execution.
BTW getClass().getClassLoader().getResourceAsStream("/img/bg.png") - which I tried first - returned me a null InputStream.
In netbeans 8.1 what I've done is to include the folder of icons and other images called Resources inside the src folder in the project file. So whenever i build Jar file the folder is included there.The file tree should be like this:
src (Java files in source packges are here)
** PACKAGE YOU NAMED IN PROJECT**
file.java
Resources
image.jpg
The code should be like:
jToggleButton1.setIcon(new javax.swing.ImageIcon(this.getClass().getResource("/resources/image.jpg")));
Load image in from Jar file during run time is the same as loading image when executed from IDE e.g netbeans the difference is that when loading image from JAR file the path must be correct and its case sensitive (very important).
This works for me
image1 = new javax.swing.ImageIcon(getClass().getResource("/Pictures/firstgame/habitat1.jpg"));
img = image1.getImage().getScaledInstance(lblhabitat1.getWidth(), lblhabitat1.getHeight(), Image.SCALE_SMOOTH);
lblhabitat1.setIcon(new ImageIcon(img));
if p in "/Pictures/firstgame/habitat1.jpg" is in lower case it wont work. check spaces, cases and spelling