When calling setLocale(Locale locale) on a Decimalbox directly followed by setValue(BigDecimal value), the formatNumber(Object value, String defaultFormat)-method will be called, throwing a java.lang.IllegalArgumentException due to a malformed pattern.

You can reproduce this behaviour with the attached files (change package in TestComposer and zul to environment ).

Also setting the format manually will NOT solve this problem (as one might suppose). Problem is, that when setting the value right after the locale, formatNumber will be called, which usually, it isn't.

Exception thrown:
java.lang.IllegalArgumentException: Malformed pattern "##,##0.##"
at java.text.DecimalFormat.applyPattern(Unknown Source)
at java.text.DecimalFormat.applyLocalizedPattern(Unknown Source)
at org.zkoss.zul.impl.NumberInputElement.formatNumber(NumberInputElement.java:219)
at org.zkoss.zul.Decimalbox.coerceToString(Decimalbox.java:164)
at org.zkoss.zul.impl.InputElement.renderProperties(InputElement.java:838)
at org.zkoss.zul.impl.FormatInputElement.renderProperties(FormatInputElement.java:52)
at org.zkoss.zul.impl.NumberInputElement.renderProperties(NumberInputElement.java:172)
at org.zkoss.zul.Decimalbox.renderProperties(Decimalbox.java:174)
at org.zkoss.zk.ui.AbstractComponent.redraw(AbstractComponent.java:1807)
at org.zkoss.zk.ui.AbstractComponent.redrawChildren(AbstractComponent.java:1884)
at org.zkoss.zk.ui.AbstractComponent.redraw(AbstractComponent.java:1826)
at org.zkoss.zk.ui.AbstractComponent.redrawChildren(AbstractComponent.java:1884)
at org.zkoss.zk.ui.AbstractComponent.redraw(AbstractComponent.java:1826)
at org.zkoss.zk.ui.sys.HtmlPageRenders.outPageContent(HtmlPageRenders.java:610)
at org.zkoss.zul.impl.PageRenderer.renderDesktop(PageRenderer.java:104)
at org.zkoss.zul.impl.PageRenderer.render(PageRenderer.java:56)
at org.zkoss.zk.ui.impl.PageImpl.redraw(PageImpl.java:856)
at org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:490)
at org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:316)
at org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:214)
at org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:135)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)