The following program gets a NPE on both win32 & solaris.

Exception in thread "main" java.lang.NullPointerException
        at sun.print.UnixPrintService.getSupportedAttributeValues(UnixPrintService.java:535)
        at Chroma.checkChroma(Chroma.java:31)
        at Chroma.main(Chroma.java:24)

// Chroma.java
import java.io.*;

import javax.print.*;
import javax.print.attribute.*;
import javax.print.attribute.standard.*;

public class Chroma {

   public static void main(String args[]) {
 
      StreamPrintServiceFactory []fact =
        StreamPrintServiceFactory.lookupStreamPrintServiceFactories(
              DocFlavor.SERVICE_FORMATTED.PRINTABLE,
              DocFlavor.BYTE_ARRAY.POSTSCRIPT.getMimeType());

      if (fact.length != 0) {
          OutputStream out = new ByteArrayOutputStream();
          StreamPrintService sps = fact[0].getPrintService(out);
          checkChroma(sps);
      }

      PrintService defSvc = PrintServiceLookup.lookupDefaultPrintService();
      if (defSvc != null) {
           checkChroma(defSvc);
      }

   }

    static void checkChroma(PrintService svc) {
       if (svc.isAttributeCategorySupported(Chromaticity.class)) {
            svc.getSupportedAttributeValues(Chromaticity.class,null,null);
       }
    }
 
}