I know what the problem is I just do not know how to fix it. So I have an image that I am trying to render in my program. I use ImageIO to load the image. But it seems to have a problem wit the path I am giving it. I am using NetBeans as my IDE and I dont know if I am saving the image file correctly.
First method:
public void init(){
BufferedImageLoader loader = new BufferedImageLoader();
try{
spriteSheet = loader.loadImage("/sprite_sheet.png");
}catch(IOException e){
e.printStackTrace();
}
SpriteSheet ss = new SpriteSheet(spriteSheet);
player = ss.grabImage(1,1,32,32);
}
the loader BufferedImageLoader class:
public class BufferedImageLoader {
private BufferedImage image;
public BufferedImage loadImage(String path) throws IOException{
image = ImageIO.read(getClass().getResource(path));
return image;
}
}
I have the image saved under a 'res' folder under 'src' folder.
Error:
Exception in thread "Thread-2" java.lang.IllegalArgumentException: input == null!
Thank you.
Why do you need to use getClass().getResource() ?
Most simple usage of ImageIO.read is as follows.
image = ImageIO.read(new File(path));
You may need to add folders to path also.
spriteSheet = loader.loadImage("/src/res/sprite_sheet.png");
Try using an absolute path for your file or if you need a relative check this post (eg assuming you have a res folder under default package did you try "/res/yourfile"
Related
i want to upload an image via primefaces:fileUpload and then display it on a div for example with css.
I can already save the image on the server:
public void upload() throws IOException, URISyntaxException {
if (logo != null) {
File fileImage = new File(System.getProperty("jboss.server.data.dir"), "uploads.png");
BufferedImage img = ImageIO.read(new ByteArrayInputStream(logo.getContents()));
if (fileImage.exists()) {
fileImage.delete();
}
ImageIO.write(img, "png", fileImage);
}
}
And then i tried to get the web path to the file but that didn't worked:
public String getImagePath(){
File fileImage = new File(System.getProperty("jboss.server.data.dir"), "uploads.png");
Set<String> set = FacesContext.getCurrentInstance().getExternalContext().getResourcePaths(fileImage.getAbsolutePath());
return set.iterator().next();
}
I need something like this:
/ewarehouse/javax.faces.resource/dynamiccontent.properties.xhtml?ln=primefaces&v=6.2&v=6.2&pfdrid=f52e395e4f38c09a1990e8f9d0c5806d&pfdrt=sc&pfdrid_c=true
Can someone help me or has a other way to do this ?
It worked for me to create a servlet and refered to the file position.
background-image: url('#{'/'}ewarehouse#{'/'}images//dynamic#{'/'}?file=uploads.png')
In css it look a bit weird but this way it worked Thanks for the answer to #JasperdeVries and #Kukeltje
I have this structure in my project:
and my code is simply this:
public class ChapterTwo {
public static void main( String[] args )
{
try {
//File imageFile = new File("../../../../resources/lena.jpg");
String image = ChapterTwo.class.getResource("resources/lena.jpg").toExternalForm();
System.out.println(image);
//MBFImage image = ImageUtilities.readMBF(imageFile);
} catch (Exception e) {
e.printStackTrace();
}
}
}
Now this has been driving me crazy. how hard is it to make java locate an image in a simple directory structure?
I tried:
resources/lena.jpg
/resources/lena.jpg
../resources/lena.jpg
../../../../../resources/lena.jpg
nothing works. When I load the File and call exists() it always returns false. How do I load this image?
PS: My code is just testing code, but you get the idea, I was trying various stuff.
And it is com.foo not com
EDIT:
From the answers:
String imagePath = ChapterTwo.class.getClassLoader().getResource("lena.jpg").toExternalForm();
File imageFile = new File(imagePath);
System.out.println(imageFile.exists());
I get false ....
String image = ChapterTwo.class.getClassLoader().getResource("lena.jpg").getPath();
Ok, I am not sure what I am doing wrong here but I am not able to reference images in my NB Java project. My code is basically the same as this:
ImageIcon i = new ImageIcon("Resources/character.png");
I Have a package called Resources in my src, and character.png in that package, so what am I doing wrong?
If your file is within the class path (eg. <project>/src/Resources/character.png), load it as resource:
Here's an example:
public class Example
{
public ImageIcon loadImage()
{
// Note the '/'
final String path = "/Resources/character.png";
// Load the image as a resource
ImageIcon icon = new ImageIcon(this.getClass().getResource(path));
// Return the result
return icon;
}
}
// ...
Example e = new Example();
ImageIcon icon = e.loadImage();
Im trying to load an image from my res folder which is already part of the Java BuildPath. Sadly it seems I am no able to find the image neither with relative nor with an absolute path to the file.
Im always getting this error message:
Exception in thread "Thread-2" java.lang.IllegalArgumentException: input == null!
at javax.imageio.ImageIO.read(Unknown Source)
at schneider.twodgame.BufferedImageLoader.loadImage(BufferedImageLoader.java:14)
at schneider.twodgame.Game.init(Game.java:64)
at schneider.twodgame.Game.run(Game.java:99)
at java.lang.Thread.run(Unknown Source)
And here is a part of the code:
public class BufferedImageLoader {
private BufferedImage image;
public BufferedImage loadImage(String path) throws IOException {
System.out.println(getClass());
image = ImageIO.read(getClass().getResource(path));
return image;
}
}
This is the method I am trying to load the image with. The method is part of my Main Class:
public void init() {
BufferedImageLoader loader = new BufferedImageLoader();
try {
spriteSheet = loader.loadImage("/res/sprite_sheet.png");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Have a look here.
spriteSheet = loader.loadImage("/sprite_sheet.png");
Should work.
It is currently looking in your .class file folder or .jar file at the location of your class files in:
[root folder of class files]/res/sprite_sheet.png
Maybe it should be looking in:
[root folder of class files]/schneider/twodgame/res/sprite_sheet.png
In that case you should remove the leading slash (/).
I try to display an image using a JLabel. This is my project navigator:
From SettingsDialog.java I want to display an image using following code:
String path = "/images/sidebar-icon-48.png";
File file = new File(path);
Image image;
try {
image = ImageIO.read(file);
JLabel label = new JLabel(new ImageIcon(image));
header.add(label); // header is a JPanel
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
The code throws an exception: Can't read input file!
Is the path of the image is wrong?
Don't read from a file, read from the class path
image = ImageIO.read(getClass().getResource(path));
-or-
image = ImageIO.read(MyClass.class.getResource(path));
When you use a File object, you're telling the program to read from the file system, which will make your path invalid. The path you are using is correct though, when reading from the class path, as you should be doing.
See the wiki on embedded resource. Also see getResource()
UPDATE Test Run
package org.apache.openoffice.sidebar;
import javax.swing.*;
public class SomeClass {
public SomeClass() {
ImageIcon icon = new ImageIcon(
SomeClass.class.getResource("/images/sidebar-icon-48.png"));
JLabel label = new JLabel(icon);
JFrame frame = new JFrame("Test");
frame.add(label);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run() {
new SomeClass();
}
});
}
}
"/images/sidebar-icon-48.png" is root path. On windows would be c:\images\sidebar-icon-48.png or d:\images\sidebar-icon-48.png depending on current drive (java converts the / to \ - not an issue). Linux images would a child of root /images/sidebar-icon-48.png Need to load relative to class or relative to the jar that had the class (if you do not want to store images inside jar.
In big projects its nice to have images and other resources outside the jar so the jar is smaller and more importantly its easy to change the resources without fiddling with jars/ wars.
Since you seem to be making a add on for open office, you will have to keep everything in jar and so peeskillet answer is right. But make sure your images folder is being packed in the jar. Extract the jar ising the jar command or rename the file to zip and extract.
Or check and fix project settings. How to make a jar in eclipse ... latest one has a wizard that makes an ant script or this SO
try to use this directly :
JLabel label = new JLabel(new ImageIcon(path));
and delete these line :
File file = new File(path);
image = ImageIO.read(file);
if error still exist paste the following error