Cannot access image in jar

Question

I have created a jar file in which I fill in the client classes, one of which loads an image as below:
try
System.out.println("before loading the image is ...");
url = new URL(getClass().getResource("../images/Leo.bmp"), "Leo.bmp");
System.out.println("The url is ...=" url);
image = ImageIO.read(url);
System.out.println("the image is ...=" image);
catch (Exception e) { /handled in paintComponent()/System.out.println("image loading unsuccessful..."); }
The client works fine, that is, it loads the image fine, only when I run the program in eclipse. But when I create a jar file and try to run it, it throws the exception and doesn't load the image.
The jar file entries are:
- cs package which has the class files and the source files
- images folder which has the Leo.bmp image
- META-INF which MANIFEST.MF
- .classpath
- .project
So the problem that everything works fine, but the only problem is that my JPanel class cannot load the image.

Answer 1

blinkaj wrote:
I have created a jar file in which I fill in the client classes, one of which loads an image as below:
try
System.out.println("before loading the image is ...");
url = new URL(getClass().getResource("../images/Leo.bmp"), "Leo.bmp");
System.out.println("The url is ...=" url);
image = ImageIO.read(url);
System.out.println("the image is ...=" image);
catch (Exception e) { /handled in paintComponent()/System.out.println("image loading unsuccessful..."); }What a freakin' mess. How can you read that rubbish? When posting code for others to examine, please
1) use the standard forms of indenting and bracketing code, and don't have two or more code statements per line.
2) post it inside code tags so the formatting and indentation is preserved. To do that, select the code and click the CODE button.
try
    System.out.println("before loading the image is ...");
    url = new URL(getClass().getResource("../images/Leo.bmp"), "Leo.bmp");
    System.out.println("The url is ...=" url);
    image = ImageIO.read(url);
    System.out.println("the image is ...=" image);
catch (Exception e)
    /handled in paintComponent()
    /System.out.println("image loading unsuccessful...");
}Now that I can clearly see the code:
1) Don't swallow exceptions(3). Either throw them or at the very least report them.
2) getClass().getResource() will return a valid URL, or null. If it is valid, the extra 'wrapper' you have for creating a URL is unnecessary, and if it is null, adding the
new URL(null, "Leo.bmp")is pointless.
3) Hey. Wait a second! That code should not even compile!
import java.net.*;
class TestCompile {
    public static void main(String[] args) {
        URL url;
        try
            System.out.println("before loading the image is ...");
            url = new URL(getClass().getResource("../images/Leo.bmp"), "Leo.bmp");
            System.out.println("The url is ...=" url);
            image = ImageIO.read(url);
            System.out.println("the image is ...=" image);
        catch (Exception e)
            /handled in paintComponent()
            /System.out.println("image loading unsuccessful...");
Running tool: Java Compile
/media/disk/projects/numbered/all/TestCompile.java:10: ')' expected
              System.out.println("The url is ...=" url);
                                                  ^
/media/disk/projects/numbered/all/TestCompile.java:10: illegal start of expression
              System.out.println("The url is ...=" url);
                                                      ^
/media/disk/projects/numbered/all/TestCompile.java:13: ')' expected
              System.out.println("the image is ...=" image);
                                                    ^
/media/disk/projects/numbered/all/TestCompile.java:13: illegal start of expression
              System.out.println("the image is ...=" image);
                                                          ^
/media/disk/projects/numbered/all/TestCompile.java:17: illegal start of expression
              /handled in paintComponent()
              ^
/media/disk/projects/numbered/all/TestCompile.java:17: ';' expected
              /handled in paintComponent()
                      ^
/media/disk/projects/numbered/all/TestCompile.java:17: ';' expected
              /handled in paintComponent()
                                        ^
7 errors
Why are you wasting our time by putting some 'approximate representation' of the code you are using?
Further, your use of the '..' prefix is probably causing problems. Instead try..
url = getClass().getResource("/images/Leo.bmp");