I18N and number formatting

I wanted to format parameters of message. I did as follow
in my jsp  I wrote:
<fmt:message key="something">
<fmt:param value="${123456}" />
</fmt:message>
 and in the properties file :
...
something= hi {0,number,integer}
...
Then I get IllegalArgumentException. I think fmt:param tag sends my
parameter as String to DecimalFormat.format() and had not tried to
cast it to integer before passing it to DecimalFormat.format() method.
The exception stack trace  in tomcat5.5 :
2008-04-17 10:34:37,292 ERROR
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/jspui].[jsp]
@ Servlet.service() for servlet jsp threw exception
java.lang.IllegalArgumentException: Cannot format given Object as a Number
      at java.text.DecimalFormat.format(DecimalFormat.java:480)
      at java.text.Format.format(Format.java:133)
      at java.text.MessageFormat.subformat(MessageFormat.java:1279)
      at java.text.MessageFormat.format(MessageFormat.java:828)
      at java.text.Format.format(Format.java:133)
      at org.apache.taglibs.standard.tag.common.fmt.MessageSupport.doEndTag(MessageSupport.java:200)
      at org.apache.jsp.browse.full_jsp._jspService(full_jsp.java:917)
      at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
      at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
      at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
      at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
      at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:691)
      at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:469)
      at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:403)
      at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
      at org.dspace.app.webui.util.JSPManager.showJSP(JSPManager.java:91)
      at org.dspace.app.webui.servlet.BrowserServlet.showFullPage(BrowserServlet.java:174)
      at org.dspace.app.webui.servlet.AbstractBrowserServlet.processBrowse(AbstractBrowserServlet.java:368)
      at org.dspace.app.webui.servlet.BrowserServlet.doDSGet(BrowserServlet.java:96)
      at org.dspace.app.webui.servlet.DSpaceServlet.processRequest(DSpaceServlet.java:151)
      at org.dspace.app.webui.servlet.DSpaceServlet.doGet(DSpaceServlet.java:99)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
      at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
      at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
      at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
      at java.lang.Thread.run(Thread.java:595)