hi, 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)
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