I am not able load image using getClassLoader Method

Question

Below is the code that I am trying to use.

 InputStream in = new BufferedInputStream(Tester.class.getClassLoader().getResourceAsStream("appResources/img/GESS.png"));
 Image image=null;  
 try {
         image = ImageIO.read(in);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
 System.out.println(image);

'image' comes null when I am printing it.

Possible duplicate of [getResourceAsStream returns null](http://stackoverflow.com/questions/16570523/getresourceasstream-returns-null) — Antoine, Apr 27 '17 at 07:52

score 1 · Accepted Answer · edited May 23 '17 at 12:17

1

Try this:

InputStream in = Tester.class.getResourceAsStream("your/path");
Image image=null;  
try {
    image = ImageIO.read(in);
} catch (IOException e) {
    e.printStackTrace();
}
System.out.println(image);

The value or your/path is either appResources/img/GESS.png or /appResources/img/GESS.png depending on your maven configuration and the directory you setup for your project.

For instance, if you add the following entry to your pom.xml file:

<resources>
    <resource>
        <directory>src/main/appResources</directory>
    </resource>
</resources>

Then, you can get the same resource by using a shorter path since your program knows where to look for resources:

InputStream in = Tester.class.getResourceAsStream("img/GESS.png");
Image image=null;  
try {
    image = ImageIO.read(in);
} catch (IOException e) {
    e.printStackTrace();
}
System.out.println(image);

More info here and here.

edited May 23 '17 at 12:17

Community

1
1

answered Apr 27 '17 at 07:51

Antoine

1,393
4
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it prints 'null'. – Yogesh Sanchihar Apr 27 '17 at 07:54
Hmm did you check your resource file path? Is it a maven project? – Antoine Apr 27 '17 at 07:56
yes, it is a maven project. absolute path to image /XXXX/src/main/webapp/appResources/img/Flag_of_the_United_Kingdom.svg.png – Yogesh Sanchihar Apr 27 '17 at 07:58
Did you set your resource directory in your pom.xml? ` src/main/webapp/appResources ` – Antoine Apr 27 '17 at 08:02
which pom.xml? there are two different war files XXXX and YYYY. I have get this file from XXXX war to YYYY . So do I need to add this directory to YYYY war? – Yogesh Sanchihar Apr 27 '17 at 08:08
You should have a structure like this : https://www.mkyong.com/maven/how-to-create-a-web-application-project-with-maven/ – Antoine Apr 27 '17 at 08:12
Yeah, it is the same. – Yogesh Sanchihar Apr 27 '17 at 09:08

score 0 · Answer 2 · answered Apr 27 '17 at 09:08

0

you can use InputStream instream=Thread.currentThread().getContextClassLoader().getResourceAsStream("appResources/img/GESS.png");

answered Apr 27 '17 at 09:08

G.Khandal

44
1
3

score 0 · Answer 3 · answered Apr 27 '17 at 09:12

0

you use like this InputStream instream=Thread.currentThread().getContextClassLoader().getResourceAsStream("appResources/img/GESS.png");

answered Apr 27 '17 at 09:12

G.Khandal

44
1
3

score 0 · Answer 4 · answered Apr 27 '17 at 12:59

Here are two utility methods I'm using for image loading.

public static Image getImage(final String pathAndFileName) {
    try {
        return Toolkit.getDefaultToolkit().getImage(getURL(pathAndFileName));
    } catch (final Exception e) {
        //logger.error(e);
        return null;
    }
}

public static URL getURL(final String pathAndFileName) {
    return Thread.currentThread().getContextClassLoader().getResource(pathAndFileName);
}

I am not able load image using getClassLoader Method

4 Answers4