java.lang.StringIndexOutOfBoundsException: String index out of range: -10

com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:142)

com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133)

com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:291)

com.encrypt.Action.execute(Action.java:59)

org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:485)

com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)

<b>description</b> <u>The server encountered an internal error that prevented it from fulfilling this request.</u></p>\r

java.lang.String.substring(String.java:1911)

com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)