My own exception in jsp

Hi there....
I have a doubt. How could I show a JavaBean Exception in a JSP page.
Thanks

Hi Rohit ,
Yes my friend, I've pasted your code in my application and it worked fine. After that I compared your source with mine in order to find some problem and I got a important information.
Look that:
The problem occurs only in setting properties. When getting properties the exception works OK.
e.g.:
[bMyTest.jsp]
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%@page errorPage="ErrorPage.jsp"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <h1>Testando a P�gina de Erros</h1>
        <jsp:useBean id="test" class="bean.Utility" scope="page"/>
        <jsp:setProperty name="test" property="dayOfWeek" value="ss"/>
    </body>
</html>I've change your source code to be a setting property
Utility.java
    /** Creates a new instance of Utility */
    public Utility() {
    public void setDayOfWeek(String sDate) {
        String sDayOfWeek="";
        int iMonth = Integer.parseInt(sDate.substring(0,sDate.indexOf('/')))-1;
        String sDatePart = sDate.substring(sDate.indexOf('/')+1,sDate.lastIndexOf('/'));
        String sYearPart = sDate.substring(sDate.lastIndexOf('/')+1);
        Calendar calendar=new GregorianCalendar(Integer.parseInt(sYearPart),iMonth,Integer.parseInt(sDatePart));
        int iDayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
        switch(iDayOfWeek) {
            case 1 : sDayOfWeek="Sun";break;
            case 2 : sDayOfWeek="Mon";break;
            case 3 : sDayOfWeek="Tue";break;
            case 4 : sDayOfWeek="Wed";break;
            case 5 : sDayOfWeek="Thurs";break;
            case 6 : sDayOfWeek="Fri";break;
            case 7 : sDayOfWeek="Sat";
//        return sDayOfWeek;
    }The result is
Problemas no Sistema
Favor informar ao suporte topico o seguinte erro: null
Cheers
Marco

Similar Messages

Creating own Exception class

In my past paper it says...
Show how to create your own Exception class that derives from class Exception. The class should provide a default constructor which allows a "My Error message" message to be set, and a second constructor which has as an argument the error message. 4-MARKS
Does this look right..?
public class MyExcep extends Exception
     public MyExcep()
          super("My Error Message");
     public MyExcep(String message)
          super(message);
}

Yes. Do I get 4 marks now? or is it Four Marks?

Exception in JSP during import roles from BO to SAP

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Problem with Handling Exception in Jsp

hi
I am unable to handling exception in Jsp.
In my Simple Form i taken a simple text field named salary.
Details.jsp
<%@ page language="java" isErrorPage="true" errorPage="Det.jsp"%>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>
<html:html>
<html:form action="/det.do">
Enter Salary<html:text property="sal"/><br>
<br>
<html:submit value="SEND" />
</html:form>
</html:html>and my Actionclass is:
package com.gurukul.util;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public class DetUserAction extends Action {
     String s=null;
     int sal;
public ActionForward execute(ActionMapping map,ActionForm form,HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException
     try
     sal=Integer.parseInt(req.getParameter("sal"));
     if (sal>0)
          s="success";
     else
     throw new SalException(sal);}
     catch(SalException e)
          e.getMessage();
     return map.findForward(s);
and my Formbean is
package com.gurukul.util;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public class DetUserAction extends Action {
     String s=null;
     int sal;
public ActionForward execute(ActionMapping map,ActionForm form,HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException
     try
     sal=Integer.parseInt(req.getParameter("sal"));
     if (sal>0)
          s="success";
     else
     throw new SalException(sal);}
     catch(SalException e)
          e.getMessage();
     return map.findForward(s);
}and my struts-config.xml is
                              </form-bean>
                              <form-bean name="DetUser"
                       type="com.gurukul.util.DetUserForm">
                              </form-bean>
<action path="/det"
                      type="com.gurukul.util.DetUserAction"
                      name="DetUser"
                    input="/Details.jsp"
                       scope="request">
                       <exception key="errors.sal"
                       type="com.gurukul.util.SalException"
                       path="/jsp/Det.jsp"/>
                   <forward name="success" path="/jsp/DetailList.jsp" />
                   <forward name="failure" path="/jsp/Details.jsp"/>
                     </action>and Det.jsp(i.e error jsp) is
<%@ page language="java" isErrorPage="true"%>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>
<html:html>
<center><b>
Invalid Salary</b></center>
<%= exception.getMessage() %>
</html:html>but i didnt get exception on jsp.
please help me
Regards
VAS

hi
can you please guide me how to handle exceptions in Jsp(struts)?

Exceptions in Jsp

hi guys
cany any one guide me what are the steps to be followed while handling exceptions in jsp
regards
VS

"DriverManager cannot be resolved" means the compiler doesn't know what class this is which prbably means you left off an import statement.
<%@page import="java.sql.*" %>

How to catch exception in JSP????

how to catch exception in JSP?
I use JDeveloper 3.1
I use connection with database .
When I insert record in database
when have duplicate of primary key
how to catch this exception and
back to previous page?
I trying with folowing:
<jsp:useBean id="RowEditor" class="oracle.jbo.html.databeans.EditCurrentRecord" scope="request">
<% try {
RowEditor.setUseJS(true);
RowEditor.initialize(pageContext, "package2_Package2Module.Drzavi1View");
RowEditor.setSubmitText("Save");
RowEditor.setTargetUrl("Drzavi1View_SubmitInsertForm.jsp");
RowEditor.createNewRow();
RowEditor.setReleaseApplicationResources(true);
RowEditor.render();
catch(Exception e) {
%>
<script>
alert("primary key duplication");
history.back();
</script>
<% } %>
but i't not working
please help me

i catch exceptions as you do, i don't have any problem...
are you throwing the exception from your bean?
actually i don't catch an Exception, but an SQLException...
but it works... here is my code...
try
myclass.addElement(); // this is an insert into Oracle
catch( DataBaseFailException e ) /// an exception that i throws inside after i receive an SQLException
session.setAttribute("gMessage","e.getMessage()); // error code

Exception:oracle.jsp.parse.JspParseException

hi,
I deploy my bibeans application via jdeveloper in to application server and copy my lib file named bibeans.jar in web-inf/lib. after I try to view my jsp page which view my graph my browser show internal server error message (error 500 in IE)and following error in my log file :
04/12/14 11:00:31 Started
04/12/14 11:00:33 webapp: jsp: init
04/12/14 11:00:33 webapp: uix: init
04/12/14 11:00:33 webapp: 9.0.4.0.0 Started
04/12/14 11:02:42 webapp: JspServlet: unable to dispatch to requested page: Exception:oracle.jsp.parse.JspParseException: Line # 1, <%@ taglib uri="http://xmlns.oracle.com/bibeans" prefix="orabi" %>
Error: Unable to load taghandler class: http://xmlns.oracle.com/bibeans
04/12/14 11:04:22 webapp: JspServlet: unable to dispatch to requested page: Exception:oracle.jsp.parse.JspParseException: Line # 1, <%@ taglib uri="http://xmlns.oracle.com/bibeans" prefix="orabi" %>
Error: Unable to load taghandler class: http://xmlns.oracle.com/bibeans
what should I do ???
thanks in advance,
shima

To the web.xml file add a taglib element.
<taglib>
<taglib-uri>http://xmlns.oracle.com/bibeans/</taglib-uri>
<taglib-location>/WEB-INF/BITags.tld</taglib-location>
</taglib>

How to run exception using JSP?

How to run exception using JSP?

Why would you need the <%%> between the if else blocks? Even if you attempt to write some data within the blocks in java, you will still get an error. For example, this is illegal:
if(done)
System.out.println(true);
System.out.println("Hello World");
else
System.out.println(false);
}The compiler is expecting the 'else' to be directly after the body of the if. If it encounters anything else, it will complain. So you cannot do this in jsp either, regardless if it's a different technology, it's the same compiler.

How can I define a own exception

Hallo,
I want to delete rows in a table after pressing the "Delete"-Button.
When pressing "delete" the message box htmldb_delete_message is shown.
When pressing "Ok" the row will not deleted if there are depending rows in another table. On the Form the Error "ORA-02292: Integritäts-Constraint (EV_ADM.SEM_TEILNAHME_PN_FK) verletzt - untergeordneter Datensatz gefunden" is displayed. For this ORA--message I want to create a own exception and displays a message that the user can understand. How can I do this?
Thanks, Daniela

See also
how to avoid ora-errors to be displayed
for a similar discussion, and a solution. Follow also the links in teh posts !
Leo

Problem with JSF tags, org.apache.jasper.JasperException: Exception in JSP:

I am a beginner to JSF , I am getting the following error when I try to invoke using the following URL
http://localhost:8080/Loginjsf/
I have copied web.xml,faces-config.xml,index.jsp, userLogin.jsp and also the list of jars I am using.
java version I am using jdk1.5.0_14
tomcat version 5.5.25
JSF Version 1.1_01
---------------------------------------------------------------------this is the error------------------------------------------------------------------
exception
org.apache.jasper.JasperException: Exception in JSP: /index.jsp:7
4: </head>
5: <body>
6: </body>
7: <jsp:forward page="userLogin.jsp"></jsp:forward>
8: </html>
Stacktrace:
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:451)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
org.apache.jasper.JasperException: Exception in JSP: /userLogin.jsp:15
12: </head>
13:
14: <body>
15:      <f:view>
16:           <h:form id="UserName">
17:           <f:loadBundle basename ="com.demo.MessageBundle" var="bundle"/> <br>
18:                     <h:inputText></h:inputText>
Stacktrace:
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:451)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:686)
     org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:656)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:50)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
javax.servlet.ServletException: Cannot find FacesContext
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:774)
     org.apache.jsp.userLogin_jsp._jspService(userLogin_jsp.java:92)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:686)
     org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:656)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:50)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
javax.servlet.jsp.JspException: Cannot find FacesContext
     javax.faces.webapp.UIComponentTag.doStartTag(UIComponentTag.java:399)
     com.sun.faces.taglib.jsf_core.ViewTag.doStartTag(ViewTag.java:105)
     org.apache.jsp.userLogin_jsp._jspx_meth_f_005fview_005f0(userLogin_jsp.java:107)
     org.apache.jsp.userLogin_jsp._jspService(userLogin_jsp.java:82)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:686)
     org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:656)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:50)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
THE WEB.XML FILE I AM USING IS
The web.xml, faces-config.xml files which I am using ,
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<context-param>
<param-name>javax.faces.CONFIG_FILES</param-name>
<param-value>/WEB-INF/faces-config.xml</param-value>
</context-param>
<context-param>
<param-name>javax.faces.DEFAULT_SUFFIX</param-name>
<param-value>.xhtml</param-value>
</context-param>
<context-param>
<param-name>com.sun.faces.validateXml</param-name>
<param-value>true</param-value>
<description>
Set this flag to true if you want the JavaServer Faces
Reference Implementation to validate the XML in your
faces-config.xml resources against the DTD. Default
value is false.
</description>
</context-param>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.faces</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

     <listener>
          <listener-class>com.sun.faces.config.ConfigureListener</listener-class>
     </listener>
</web-app>
THE FACES-CONFIG.XML I AM USING
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE faces-config PUBLIC "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN" "http://java.sun.com/dtd/web-facesconfig_1_1.dtd">
<faces-config >
     <application>
          <view-handler>com.sun.facelets.FaceletViewHandler</view-handler>
     </application>
     <managed-bean>
          <managed-bean-name>UserBean</managed-bean-name>
          <managed-bean-class>com.demo.bean.UserBean</managed-bean-class>
          <managed-bean-scope>session</managed-bean-scope>
          <managed-property>
               <property-name>userName</property-name>
               <property-class>java.lang.String</property-class>
               <value></value>
          </managed-property>
          <managed-property>
               <property-name>password</property-name>
               <property-class>java.lang.String</property-class>
               <value></value>
          </managed-property>
     </managed-bean>
     <navigation-rule>
          <from-view-id>/userLogin.jsp</from-view-id>
          <navigation-case><from-outcome>failure</from-outcome>
               <to-view-id>/loginForm.jsp</to-view-id>
          </navigation-case>
          <navigation-case>
               <from-action>success</from-action>
               <to-view-id>/userLoginSuccess.jsp</to-view-id>
          </navigation-case></navigation-rule>
     <navigation-rule>
          <from-view-id>/userLoginSuccess.jsp</from-view-id>
     </navigation-rule>
     <navigation-rule>
          <from-view-id>/loginForm.jsp</from-view-id>
     </navigation-rule>
     </faces-config>
THE INDEX.JSP I AM USING
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
</head>
<body>
</body>
<jsp:forward page="userLogin.jsp"></jsp:forward>
</html>
THE USERLOGIN.JSP is
<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="/WEB-INF/html_basic.tld" prefix="h"%>
<%@ taglib uri="/WEB-INF/jsf_core.tld" prefix="f"%>
<html>
<head>
<title>My JSF 'userLogin' starting page</title>
     
</head>
<body>
<f:view>
<h:form id="UserName">
     <f:loadBundle basename ="com.demo.MessageBundle" var="bundle"/> <br>
          <h:inputText></h:inputText>
          <h:outputLabel value="UserName"></h:outputLabel>
          <h:inputText></h:inputText>
          <h:outputLabel for="Password" value="Password" id="Password"></h:outputLabel>
</h:form>
</f:view>
</body>
</html>
THE JAR FILES LOCATED AT tomcat-5.5\webapps\Loginjsf\WEB-INF\lib
commons-beanutils.jar
commons-collections.jar
commons-digester.jar
commons-logging.jar
el-api.jar
el-ri.jar
jsf-api.jar
jsf-facelets.jar
jsf-impl.jar
jstl.jar
standard.jar
It would be great if you could help me in resolving this problem, what is that I am doing wrong?

Thanks for your suggestions, I updated the web.xml and index.jsp accordingly but this time I am getting a different kind of error as below
org.apache.jasper.JasperException: Exception in JSP: /index.jsp:6
3: <head>
4: </head>
5: <body>
6: <jsp:forward page="userLogin.faces"></jsp:forward>
7: </body>
8: </html>
Stacktrace:
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:451)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
javax.servlet.ServletException: Error Parsing /userLogin.jsp: Error Traced[line: 1] The markup in the document preceding the root element must be well-formed.
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:202)
     org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:686)
     org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:656)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:49)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
com.sun.facelets.FaceletException: Error Parsing /userLogin.jsp: Error Traced[line: 1] The markup in the document preceding the root element must be well-formed.
     com.sun.facelets.compiler.SAXCompiler.doCompile(SAXCompiler.java:234)
     com.sun.facelets.compiler.Compiler.compile(Compiler.java:105)
     com.sun.facelets.impl.DefaultFaceletFactory.createFacelet(DefaultFaceletFactory.java:197)
     com.sun.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:144)
     com.sun.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:95)
     com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:496)
     com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:546)
     com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
     com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
     com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
     org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:686)
     org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:656)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:49)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

N00b query: Why would anyone ever want to define their own Exception class?

I've been reading thru my Java textbook for the past couple hours.
Exceptions are a wonderful thing. I already found several instances where I could've implemented try/cacth in my earlier programs.
Anyway, getting back to the point. My question is, can someone give me a realistic situation/example where a custom Expcetion class is REQUIRED? (the key word here is "required"!)
I can see why someone would want to have his own Exception class..... e.getMessage() as custom error messages are SO DAMN COOL!!!!!! :P
hehe
But seriously, if you are making intermidiate/advanced Java programs, would you ever REQUIRE to make your own Exception class? Afterall, even a custom made Exception class always "extends" from a pre-defined Java class, right?
Let me make this a bit more clear... public class CustomException extends IOException{ }Now, if I am making a try/catch statement, I can simply say
try{
throw new CustomException;
catch (IOException e) { }
Now as you can see, the CustomException was caught by the catch claus, because IOException is the superclass of CustomException. So, in other words, the whole CustomException thingy didnt do anything useful.
I know I know, I am so naive. Enlighten me >.<

Sure. Say you want to have a system where you want to include a custom error code which maps to some internationalized error messages. You would create an Exception subclass with a field to hold that value separate from the normal "default" message. Then you could throw that exception in all your code. Other code can catch it as a plain Exception if they want and use the "default" message, which is okay if they don't really care about the error code.
I don't think you are ever "required" to make your own exceptions. I have done so, but I don't often. It depends. See, there are plenty of Exception subclasses in the standard packages, and most of them cover many of the things you need. So more often if I'm throwing an exception, I'll be using the already existing ones, like IllegalArgumentException or IOException (whatever is relevant to the code).
Yes, you can do what you did below with CustomException. However the reason you might do that is cuz you really want to do this:
try {
   // call some code that may throw IOException from some standard IO package
   // or may throw CustomException from some of my methods...
} catch (CustomException ce) {
   // handle cusotm exception
} catch (IOException ioe) {
   // handle IO exception
}Cuz you may want to differentiate between your exceptions vs. IOExceptions that might be thrown from some java.io class.
Usually when you use an exception class it's a named class that relates to some condition. It may hold additional information besides the standard message, but I think most of the time it's just the class name which describes the problem. And if there isn't one that describes the problem that you're code might encounter, then create a subclass.

Own php or jsp files

Hello,
can I upload and run on apex.oracle.com my own php or jsp scripts ?
Thank you

No.

Throwing my own exception

I'm trying to throw my own exception but can't seem to do it. the method i'm using has three different exceptions that i need to declare. Heres my code with one exception (not working of course):
     public static String ProcessUserInput(){
          BufferedReader kbd = new BufferedReader(new InputStreamReader(System.in));
          String line = "";
          BlankException blanke = new BlankException blanke();
          try{
line = kbd.readLine();
catch (IOException ex)
System.out.println( "Error reading keyboard input." );
return line;
I've tried to throw a new exception called BlankException but i get the following error message:
'(' or '[' expected
BlankException blanke = new BlankException blanke();
How do i put three of my own exceptions in this piece of code?

how do i do that if i have three exceptions in the one methodYou can declare your method to throw as many exceptions as you want.
Example:public void method() throws CustomExceptionA, CustomExceptionB, CustomExceptionC {
    if (/* something goes wrong */) {
        throw new CustomExceptionA();
    try {
    catch(IOException ioEx) {
        throw new CustomExceptionB();
    catch(Exception ex) {
        throw new CustomExceptionC();
}

Define our own Exceptions in th function builder

hi
how to define our own Exceptions in th function builder in the Exception tab and how to use them in functon definiton.
regards
ravish

Hi,
<b>Exceptions</b>
The exception of a function module are defined on the Exceptions tab page in the Function Builder. Here you can select exception classes to define whether class-based exceptions are declared or non-class-based exception are defined. Class-based exceptions are represented in the above syntax by RAISING, and non-class-based exceptions are represented by EXCEPTIONS.
The addition RAISING is used to declare class-based exceptions that can be propagated from the function module to the caller. Exceptions in the categories CX_STATIC_CHECK and CX_DYNAMIC_CHECK must be explicitly declared, otherwise a propagation can lead to an interface violation. A violation of the interface leads to the treatable exception CX_SY_NO_HANDLER. Exceptions of the category CX_NO_CHECK are implicitly always declared. The declaration of exceptions of the category CX_STATIC_CHECK is statically checked in the syntax check. For exceptions of the category CX_DYNAMIC_CHECK, the check is not performed until runtime. In a function module in which class-based exceptions are declared with the RAISING addition, the statement CATCH SYSTEM-EXCEPTIONS cannot be used. Instead, the relevant treatable exceptions should be handled in a TRY control structure.
The addition EXCEPTIONS is used to define a list of non-class-based exceptions that can be triggered in the function module using the statements RAISE or MESSAGE RAISING. Exceptions defined in this way - as with formal parameters - are bound to the function module and cannot be propagated. If an exception of this type is triggered in a function module, and no return value has been assigned to it with the homonymous addition EXCEPTIONS of the CALL FUNCTION statement when the call was made, this leads to a runtime error.
<b>Note</b>
For new developments after release 6.10, SAP recommends that you work with class-based exceptions that are independent of the function module.
Regards,
Padmam.<b></b>

Defining own exception

Hi,
I need to create an exception that will be thrown if a call to function x returns a negative value. I assume that means I need to create my own exception class. However, everything I've read about creating one's own exception class involves merely changing the text thrown by a given exception. How does one actually define an exception which says "Throw this when x is a particular value"?
Any suggestions?
Cheers,
Didje

You detect the fault yourself, and throw it. Eg
public class NegativeException extends Exception {
public NegativeException() {
super("negative number");
// in code elsewhere
if ( getValue() < 0 ) throw new NegativeException();

My own exception in jsp

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