src/java.desktop/share/classes/javax/imageio/spi/ImageReaderWriterSpi.java

*** 602,619 ****
              ex.initCause(e);
              throw ex;
          }
      }
  
      private Class<?> getMetadataFormatClass(String formatClassName) {
          Module thisModule = ImageReaderWriterSpi.class.getModule();
          Module targetModule = this.getClass().getModule();
!         Class<?> c = Class.forName(targetModule, formatClassName);
          if (thisModule.equals(targetModule) || c == null) {
              return c;
          }
!         if (thisModule.isNamed()) {
              int i = formatClassName.lastIndexOf(".");
              String pn = i > 0 ? formatClassName.substring(0, i) : "";
              if (!targetModule.isExported(pn, thisModule)) {
                  throw new IllegalStateException("Class " +  formatClassName +
                    " in named module must be exported to java.desktop module.");
--- 602,628 ----
              ex.initCause(e);
              throw ex;
          }
      }
  
+     // If updating this method also see the same in IIOMetadata.java
      private Class<?> getMetadataFormatClass(String formatClassName) {
          Module thisModule = ImageReaderWriterSpi.class.getModule();
          Module targetModule = this.getClass().getModule();
!         Class<?> c = null;
!         try {
!             ClassLoader cl = this.getClass().getClassLoader();
!             c = Class.forName(formatClassName, false, cl);
!             if (!IIOMetadataFormat.class.isAssignableFrom(c)) {
!                 return null;
!             }
!         } catch (ClassNotFoundException e) {
!         }
          if (thisModule.equals(targetModule) || c == null) {
              return c;
          }
!         if (targetModule.isNamed()) {
              int i = formatClassName.lastIndexOf(".");
              String pn = i > 0 ? formatClassName.substring(0, i) : "";
              if (!targetModule.isExported(pn, thisModule)) {
                  throw new IllegalStateException("Class " +  formatClassName +
                    " in named module must be exported to java.desktop module.");