FULL PRODUCT VERSION :
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+114)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+114, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
ImageIO.getImageReadersByFormatName("JPEG");

fails, but only if jai_imageio.jar (version 1.1, file size 1140632) is in the class path.





REGRESSION. Last worked in version 8u91

ADDITIONAL REGRESSION INFORMATION:
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
compile the code on jdk8, then run it on jdk9:

"C:\Program Files\Java\jre-9\bin\java" -cp "XXXX\JDK9Test\dist\JDK9Test.jar;XXXX\lib\*" jdk9test.JDK9Test

and have jai_imageio.jar in the lib directory

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
normal end
ACTUAL -
a stack trace

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.lang.ExceptionInInitializerError
at jdk9test.JDK9Test.main(JDK9Test.java:11)
Caused by: java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(java.base@9-ea/NumberFormatException.java:65)
at java.lang.Integer.parseInt(java.base@9-ea/Integer.java:705)
at java.lang.Integer.parseInt(java.base@9-ea/Integer.java:813)
at com.sun.media.imageioimpl.common.ImageUtil.processOnRegistration(ImageUtil.java:1408)
at com.sun.media.imageioimpl.plugins.wbmp.WBMPImageReaderSpi.onRegistration(WBMPImageReaderSpi.java:95)
at javax.imageio.spi.SubRegistry.registerServiceProvider(java.desktop@9-ea/ServiceRegistry.java:773)
at javax.imageio.spi.ServiceRegistry.registerServiceProvider(java.desktop@9-ea/ServiceRegistry.java:328)
at javax.imageio.spi.IIORegistry.registerApplicationClasspathSpis(java.desktop@9-ea/IIORegistry.java:214)
at javax.imageio.spi.IIORegistry.<init>(java.desktop@9-ea/IIORegistry.java:138)
at javax.imageio.spi.IIORegistry.getDefaultInstance(java.desktop@9-ea/IIORegistry.java:159)
at javax.imageio.ImageIO.<clinit>(java.desktop@9-ea/ImageIO.java:66)
... 1 more


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package jdk9test;

import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;

public class JDK9Test
{
    public static void main(String[] args)
    {
        ImageIO.getImageReadersByFormatName("JPEG");
    }
}

---------- END SOURCE ----------