Cant instantiate class:

[Avik Mazunder]

I am tring to add data in datatable...
My home.jsf is..

<rich:panel>
			<rich:dataTable value="#{home.al}" var="dataItem">
			<f:facet name="header">Document Table</f:facet>
                         <rich:column>
                        <f:facet name="header">Doc Id</f:facet>
                        <h:outputText value="#{dataItem.bookid}" />
                    </rich:column>

                    <rich:column>
                        <f:facet name="header">Doc Name</f:facet>
                        <h:outputText value="#{dataItem.bookname}" />
                    </rich:column>
                    <rich:column>
                        <f:facet name="header">Actor</f:facet>
                        <h:outputText value="#{dataItem.author}" />
                    </rich:column>

                    <rich:column>
                        <f:facet name="header">Description</f:facet>
                        <h:outputText value="#{dataItem.upload}" />
                    </rich:column>
 				 </rich:dataTable>
</rich:panel>

home.java

import java.util.*;

public class home {
	ArrayList<bookdetails> al=new ArrayList<bookdetails>();
	public ArrayList<bookdetails> getAl() {
		bookdetails details = new bookdetails();
		details.setBookid("123456789");
		details.setBookname("shdg");
		details.setAuthor("avik");
		details.setUpload("5764");
		al.add(details);
		return al;
	}

	public void setAl(ArrayList<bookdetails> al) {
		this.al = al;
	}
}

bookdetails.java

public class bookdetails {
	public String bookid;
	public String bookname;
	public String author;
	public String upload;
	public String getBookid() {
		return bookid;
	}
	public void setBookid(String bookid) {
		this.bookid = bookid;
	}
	public String getBookname() {
		return bookname;
	}
	public void setBookname(String bookname) {
		this.bookname = bookname;
	}
	public String getAuthor() {
		return author;
	}
	public void setAuthor(String author) {
		this.author = author;
	}
	public String getUpload() {
		return upload;
	}
	public void setUpload(String upload) {
		this.upload = upload;
	}
	
}

face-config.xml

[b]<managed-bean>
  <managed-bean-name>home</managed-bean-name>
  <managed-bean-class>home</managed-bean-class>
  <managed-bean-scope>session</managed-bean-scope>
 </managed-bean>[/b]

Its is giving this error...

javax.faces.FacesException: javax.faces.FacesException: Cant instantiate class: home.. home
	at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:560)
	at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:82)
	at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
	at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
	at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:45)
	at org.apache.el.parser.AstValue.getValue(AstValue.java:86)

[Tim Holloway]

If you http://www.coderanch.com/how-to/java/UseCodeTags it will be a lot more readable than if you simply boldface your code and XML.

In Java, class names must begin with an upper-case letter. Instance and property names must begin with a lower-case letter. So "home" is not a proper class name, and even though it will compile, JSF won't like it.

Additionally, you should always declare a package to contain classes. When you do not, a "default package" is assigned, and that, too makes a lot of Java systems unhappy. When you map the class in faces-config.xml, supply the fully-qualified classname. For example:
<managed-bean> <!-- Instance name, begins lower-case --> <managed-bean-name>home</managed-bean-name> <!-- Fully-qualified class name --> <managed-bean-class>com.javaranch.demo.Home</managed-bean-class> <managed-bean-scope>session</managed-bean-scope> </managed-bean>

[Avik Mazunder]

Tim Holloway wrote:If you http://www.coderanch.com/how-to/java/UseCodeTags it will be a lot more readable than if you simply boldface your code and XML.

In Java, class names must begin with an upper-case letter. Instance and property names must begin with a lower-case letter. So "home" is not a proper class name, and even though it will compile, JSF won't like it.

Additionally, you should always declare a package to contain classes. When you do not, a "default package" is assigned, and that, too makes a lot of Java systems unhappy. When you map the class in faces-config.xml, supply the fully-qualified classname. For example:

I have followed your suggestion but it didn't work....getting the same error...!Thank you...

[Tim Holloway]

I do recommend that you find good some books covering both basic JavaBeans and JSF.

There are a number of things that can go wrong, and understanding the fundamentals of the platform will help a lot. Among the things that can cause an instantiation failure are:

o Failure to name the class ".java" file properly. Even in Windows, the source file name is case-sensitive. So the class named "com.javaranch.demo.Home" must reside in com\javaranch\demo\Home.java, and not "home.java".

o Failure in constructor code. If the class has a constructor (or inherits one) and there is an Exception thrown in the constructor method, this will cause instantiation failure

o Failure to specify the JSF configuration file properly. It must be (unless overridden explicitly in web.xml) at /WEB-INF/faces-config.xml. You wrote "face-config", not "faces-config", so make sure that the actual name is correct.

There are, unfortunately, a lot of other things that have to be done properly as well, but these are all critical ones.

[Avik Mazunder]

is the java code right??