Can we instantiate an interface

Is the following example proper or any error is there
Interface I
AbstractList A;
class B implements I
A al=new A();
Can we do like this or we wl get any error

An interface is like an outline, where the class is the actual essay. The interface mentions the things that need to happen.
A better way to remember it might be if you are already familiar with the terms User Interface, Graphical User Interface, and GUI. Suppose you had a closed metal box with a button on the outside, but you knew that there were all kinds of gears and pulleys inside that would start moving around at the touch of the button. The button is the interface, the stuff inside is the implementation.

Similar Messages

RfcAdapter: receiver channel has static errors: can not instantiate RfcPool

HI,
While transferring the project from SAP system to PRIMVERA (third party system) system, iam getting the following error:
com.sap.engine.interfaces.messaging.api.exception.MessagingException: com.sap.aii.adapter.rfc.afcommunication.RfcAFWException: RfcAdapter: receiver channel has static errors: can not instantiate RfcPool caused by: com.sap.aii.adapter.rfc.RfcAdapterException: error initializing RfcClientPool:com.sap.aii.adapter.rfc.core.repository.RfcRepositoryException: can not connect to destination system due to: com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to SAP gateway failed Connect_PM TYPE=A ASHOST=192.168.215.138 SYSNR=02 GWHOST=192.168.215.138 GWSERV=sapgw02 PCS=1 LOCATION CPIC (TCP/IP) on local host with Unicode ERROR partner '192.168.215.138apgw02' not reached TIME Sun May 01 06:10:03 2011 RELEASE 710 COMPONENT NI (network interface) VERSION 39 RC -10 MODULE nixxi.cpp LINE 3133 DETAIL NiPConnect2: 192.168.215.138:3302 SYSTEM CALL connect ERRNO 10060 ERRNO TEXT WSAETIMEDOUT: Connection timed out COUNTER
experts, kindly help me out in resolving this issue.
Regards,
Sai

partner '192.168.215.138apgw02' not reached
Well if you ask me, theres something seriuosly wrong with above "partner", review the config of the RFC/JCO,
also you could add more details as above info on its own is not enough to give you and objective answer
Regards
Juan

I can Ping FW inside interface but can not connect to remote resources

dear all
i configer my asa 5520 through ASDM to enable VPN Connection , i follow the cisco steps and it works fine and the anyconnect version 3.1 in Windows 8 - one day troubleshoot for this point only - can connect and have an IP address from the range , but i have something wrong in NAT may be because all guides talking about old ASDM ( NAT Exempt) but i am confeused to apply it on the new ASDM.
i can ping the inside interface from my labtop which using anyconnect , but i can not access anything else inside my network
Please anyone has a solution , please describe it using ASDM , thanks for help
This is my configuration
interface GigabitEthernet0/1
description
nameif SRV_ZONE
security-level 50
ip address 192.168.1.1 255.255.255.0
interface GigabitEthernet0/2
description
nameif TRUST_ZONE
security-level 100
ip address 172.17.200.1 255.255.255.0
interface GigabitEthernet0/3
shutdown
no nameif
no security-level
no ip address
interface Management0/0
nameif MGMT
security-level 0
ip address 10.10.10.1 255.255.255.0
dns server-group DefaultDNS
domain-name xxx.xxx.xxx
object network obj-192.168.1.11
host 192.168.1.11
object network obj-xxx.xxx.xxx.xxx
host xxx.xxx.xxx.xxx
object service obj-tcp-source-eq-25
service tcp source eq smtp
object network obj-192.168.1.12
host 192.168.1.12
object network obj-xxx.xxx.xxx.xxx
host xxx.xxx.xxx.xxx
object network obj-192.168.1.0
subnet 192.168.1.0 255.255.255.0
object service obj-tcp-eq-25
service tcp destination eq smtp
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network obj-0.0.0.0
host 0.0.0.0
object network obj_any-01
subnet 0.0.0.0 0.0.0.0
object network obj-172.17.8.8
host 172.17.8.8
object network obj-172.17.0.0
subnet 172.17.0.0 255.255.0.0
object network obj_any-02
subnet 0.0.0.0 0.0.0.0
object network obj_any-03
subnet 0.0.0.0 0.0.0.0
object network obj_any-04
subnet 0.0.0.0 0.0.0.0
object network obj_any-05
subnet 0.0.0.0 0.0.0.0
object network obj_any-06
subnet 0.0.0.0 0.0.0.0
object network obj.172.17.8.115
host 172.17.8.115
object network obj.xxx.xxx.xxx.xxx
host xxx.xxx.xxx.xxx
object service http
service tcp source eq www destination eq www
object network obj.xxx.xxx.xxx.xxx
host xxx.xxx.xxx.xxx
object service https
service tcp source eq https destination eq https
object service newservice
service tcp source eq pop3 destination eq pop3
object network mail
host 172.17.8.8
description mail
object network 192.168.1.11
host 192.168.1.11
description smtp
object service smtpnew
service tcp source eq 587 destination eq 587
object network VPN_RANGE
description VPN ACCESS RANGE
object network VPN_PoOL
subnet 172.17.16.0 255.255.255.0
description vpn
object-group network DM_INLINE_NETWORK_1
network-object host 192.168.1.11
network-object host 192.168.1.12
object-group network Eighth_Floor
network-object 172.17.8.0 255.255.255.0
object-group service WEB_SERVICES
service-object tcp destination eq www
object-group network ENT_SERVERS
network-object host 192.168.1.11
network-object host 192.168.1.1
object-group network DM_INLINE_NETWORK_2
network-object 172.17.200.0 255.255.255.0
network-object 172.17.8.0 255.255.255.0
object-group service DM_INLINE_TCP_2 tcp
port-object eq www
port-object eq https
port-object eq smtp
object-group service web tcp
port-object eq www
port-object eq xxx
port-object eq ftp
port-object eq xxx
port-object eq xxx
object-group service xxx_Web_and_Email
service-object object http
service-object tcp destination eq pop3
service-object tcp destination eq smtp
object-group protocol TCPUDP
protocol-object udp
protocol-object tcp
object-group protocol DM_INLINE_PROTOCOL_1
protocol-object udp
protocol-object tcp
object-group protocol DM_INLINE_PROTOCOL_2
protocol-object ip
object-group protocol DM_INLINE_PROTOCOL_3
protocol-object ip
access-list DMZ_access_in extended permit ip 192.168.1.0 255.255.255.0 172.17.0.0 255.255.0.0
access-list DMZ_access_in extended permit ip 192.168.1.0 255.255.255.0 any
access-list justice_splitTunnelAcl standard permit 10.100.100.0 255.255.255.0
access-list xxx-VPN_splitTunnelAcl remark vpn
access-list xxx-VPN_splitTunnelAcl standard permit 172.17.16.0 255.255.255.0
access-list xxx-VPN_splitTunnelAcl standard permit any
access-list cap extended permit tcp any host xxx.xxx.xxx.xxx eq smtp log
access-list cap1 extended permit tcp host 192.168.1.11 any eq smtp
access-list SRV_ZONE_nat_outbound extended permit tcp 192.168.1.0 255.255.255.0 any eq smtp
access-list SRV_ZONE_nat_outbound extended permit ip host 192.168.1.11 any
access-list TRUST_ZONE_access_in extended permit ip host 172.17.88.108 any
access-list TRUST_ZONE_access_in extended permit object-group DM_INLINE_PROTOCOL_2 10.10.3.0 255.255.255.0 any
access-list TRUST_ZONE_access_in extended permit object-group DM_INLINE_PROTOCOL_3 10.10.50.0 255.255.255.0 any
access-list TRUST_ZONE_access_in extended permit ip 172.17.8.0 255.255.255.0 any
access-list TRUST_ZONE_access_in extended permit ip 172.17.200.0 255.255.255.0 any
access-list TRUST_ZONE_access_in extended permit ip 172.17.0.0 255.255.0.0 host 192.168.1.12
access-list TRUST_ZONE_cryptomap extended permit ip xxx.xxx.xxx.xxx 255.255.255.248 any
access-list outside_access_in extended permit tcp any host 192.168.1.11 eq smtp
access-list outside_access_in extended permit tcp any host 172.17.8.8 eq www
access-list outside_access_in extended permit tcp any host 192.168.1.12 object-group web
access-list outside_access_in extended permit tcp any host 172.17.8.8 eq pop3
access-list outside_access_in extended permit ip 172.17.16.0 255.255.255.0 any inactive
access-list vpn remark vpn
access-list vpn standard permit 172.17.16.0 255.255.255.0
pager lines 24
logging enable
logging trap informational
logging asdm informational
logging host TRUST_ZONE 172.17.8.100
mtu INT_ZONE 1500
mtu SRV_ZONE 1500
mtu TRUST_ZONE 1500
mtu MGMT 1500
ip local pool VPN_POOL 172.17.16.100-172.17.16.254 mask 255.255.255.0
ip verify reverse-path interface INT_ZONE
ip verify reverse-path interface SRV_ZONE
no failover
icmp unreachable rate-limit 1 burst-size 1
icmp permit any SRV_ZONE
icmp permit any TRUST_ZONE
asdm image disk0:/asdm-635.bin
no asdm history enable
arp timeout 14400
nat (SRV_ZONE,INT_ZONE) source static obj-192.168.1.11 obj-xxx.xxx.xxx.xxx service any obj-tcp-source-eq-25
nat (SRV_ZONE,INT_ZONE) source static obj-192.168.1.12 obj-xxx.xxx.xxx.xxx
nat (SRV_ZONE,INT_ZONE) source dynamic obj-192.168.1.0 interface service obj-tcp-eq-25 obj-tcp-eq-25
nat (INT_ZONE,SRV_ZONE) source static any any destination static 192.168.1.11 obj-172.17.8.8 service obj-tcp-source-eq-25 obj-tcp-source-eq-25
nat (TRUST_ZONE,INT_ZONE) source static VPN_PoOL VPN_PoOL destination static VPN_PoOL VPN_PoOL
object network obj_any
nat (SRV_ZONE,INT_ZONE) dynamic obj-0.0.0.0
object network obj_any-01
nat (SRV_ZONE,MGMT) dynamic obj-0.0.0.0
object network obj-172.17.8.8
nat (TRUST_ZONE,INT_ZONE) static xxx.xxx.xxx.xxx service tcp www www
object network obj-172.17.0.0
nat (TRUST_ZONE,SRV_ZONE) static 172.17.0.0
object network obj_any-02
nat (TRUST_ZONE,INT_ZONE) dynamic interface
object network obj_any-03
nat (TRUST_ZONE,SRV_ZONE) dynamic interface
object network obj_any-04
nat (TRUST_ZONE,INT_ZONE) dynamic obj-0.0.0.0
object network obj_any-05
nat (TRUST_ZONE,SRV_ZONE) dynamic obj-0.0.0.0
object network obj_any-06
nat (TRUST_ZONE,MGMT) dynamic obj-0.0.0.0
object network obj.172.17.8.115
nat (TRUST_ZONE,INT_ZONE) static obj.xxx.xxx.xxx.xxx service tcp www www
object network mail
nat (TRUST_ZONE,INT_ZONE) static obj-xxx.xxx.xxx.xxx service tcp pop3 pop3
nat (TRUST_ZONE,INT_ZONE) after-auto source static obj-172.17.8.8 obj-xxx.xxx.xxx.xxx service https https
access-group outside_access_in in interface INT_ZONE
access-group DMZ_access_in in interface SRV_ZONE
access-group TRUST_ZONE_access_in in interface TRUST_ZONE
route INT_ZONE 0.0.0.0 0.0.0.0 xxx.xxx.xxx.xxx 1
route TRUST_ZONE 10.10.0.0 255.255.0.0 172.17.200.254 1
route TRUST_ZONE 10.11.0.0 255.255.0.0 172.17.200.254 1
route TRUST_ZONE 10.12.0.0 255.255.0.0 172.17.200.254 1
route TRUST_ZONE 10.13.0.0 255.255.0.0 172.17.200.254 1
route TRUST_ZONE 172.17.0.0 255.255.0.0 172.17.200.254 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-record DfltAccessPolicy
aaa authentication enable console LOCAL
aaa authentication http console LOCAL
aaa authentication ssh console LOCAL
aaa authentication serial console LOCAL
http server enable
http 172.17.8.0 255.255.255.0 TRUST_ZONE
http 172.17.8.155 255.255.255.255 TRUST_ZONE
http 172.17.8.45 255.255.255.255 TRUST_ZONE
http 10.10.10.2 255.255.255.255 MGMT
http 192.168.1.12 255.255.255.255 SRV_ZONE
http 0.0.0.0 0.0.0.0 INT_ZONE
http 172.17.200.0 255.255.255.0 TRUST_ZONE
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac
crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto ipsec transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac
crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac
crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac
crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set pfs
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA ESP-3DES-MD5 ESP-DES-SHA ESP-DES-MD5
crypto dynamic-map pol 1 match address TRUST_ZONE_cryptomap
crypto dynamic-map pol 1 set transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA ESP-3DES-MD5 ESP-DES-SHA ESP-DES-MD5
crypto map INT_ZONE_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map TRUST_ZONE_map0 1 ipsec-isakmp dynamic pol
crypto map TRUST_ZONE_map0 interface TRUST_ZONE
crypto map INT_ZONE_map0 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map INT_ZONE_map0 interface INT_ZONE
crypto ca trustpoint ASDM_TrustPoint0
enrollment self
fqdn SEC-xxx-FW1
subject-name CN=SEC-xxx-FW1
no client-types
proxy-ldc-issuer
crl configure
crypto ca trustpoint ASDM_TrustPoint1
enrollment self
subject-name CN=SEC-xxx-FW1
keypair sslvpnkeypair
crl configure
crypto ca certificate chain ASDM_TrustPoint0
certificate 31
    57f4e52e 6b851966 77515d62 c209a0df 1c32ce94 bb90cbce 497cfd04 6745ea85
    efb75f85 2ae1ad35 344d94ab 915e01ab d3292626 ac697a52 b4ed6632 d3ed2332 ae
quit
crypto ca certificate chain ASDM_TrustPoint1
certificate e6054352
    c64f3661 30f14c3d 06b5f039 9f14560d 3b154fd1 42782268 7531689e 8e547d91
    85e88415 e326f653 74733a6c a3f5c935 f7e83f56 f6
quit
crypto isakmp enable INT_ZONE
crypto isakmp policy 10
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
crypto isakmp policy 65535
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 INT_ZONE
ssh 172.17.8.0 255.255.255.0 TRUST_ZONE
ssh 10.10.10.2 255.255.255.255 MGMT
ssh timeout 5
console timeout 0
management-access TRUST_ZONE
vpn load-balancing
interface lbpublic INT_ZONE
interface lbprivate INT_ZONE
priority-queue INT_ZONE
tx-ring-limit 256
threat-detection basic-threat
threat-detection scanning-threat
threat-detection statistics host number-of-rate 3
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ssl trust-point ASDM_TrustPoint1 INT_ZONE
webvpn
enable INT_ZONE
svc image disk0:/anyconnect-win-2.1.0148-k9.pkg 1
svc enable
tunnel-group-list enable
group-policy xxx-VPN internal
group-policy xxx-VPN attributes
dns-server value xx.xx.xx.xx xx.xx.xx.xx
vpn-tunnel-protocol IPSec
split-tunnel-policy tunnelspecified
split-tunnel-network-list value xxx-VPN_splitTunnelAcl
group-policy DfltGrpPolicy attributes
vpn-tunnel-protocol webvpn
group-policy GPNEW internal
group-policy GPNEW attributes
dns-server value 172.17.8.41
vpn-tunnel-protocol IPSec l2tp-ipsec svc webvpn
default-domain value xxx.xxx.xxx
address-pools value VPN_POOL
username VPNAM password xxx encrypted
username VPNAM attributes
service-type remote-access
vpn-group-policy xxx-VPN
tunnel-group xxx-VPN type remote-access
tunnel-group xxx-VPN general-attributes
dhcp-server 172.17.8.41
tunnel-group xxx-VPN ipsec-attributes
pre-shared-key *****
tunnel-group pol type ipsec-l2l
tunnel-group pol ipsec-attributes
pre-shared-key *****
trust-point ASDM_TrustPoint0
tunnel-group SSLClientProfile type remote-access
tunnel-group SSLClientProfile general-attributes
address-pool VPN_POOL
default-group-policy GPNEW
tunnel-group SSLClientProfile webvpn-attributes
group-alias SSLVPNClient enable
policy-map type inspect dns preset_dns_map
parameters
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect netbios
inspect rsh
inspect rtsp
inspect skinny
inspect sqlnet
inspect sunrpc
inspect tftp
inspect sip
inspect xdmcp
inspect ip-options
inspect pptp
service-policy global_policy global
prompt hostname context
call-home
profile CiscoTAC-1
no active
destination address http https://tools.cisco.com/its/service/oddce/services/DDCEService
destination address email [email protected]
destination transport-method http
subscribe-to-alert-group diagnostic
subscribe-to-alert-group environment
subscribe-to-alert-group inventory periodic monthly
subscribe-to-alert-group configuration periodic monthly
subscribe-to-alert-group telemetry periodic daily
Cryptochecksum:78a941e3f509dec8f3570c60061eedaa
: end

thanks god
i solve the problem
the problem is in NAT
i creat an object with the ip address host from VPN pool and name it vpn
then i do the nat from inside to that host as the following picture...
trust zone is the inside zone
vpn is the outside vpn host...
thanks and hope it helps anyone else...

Can i use one interface to load data into 2 different tables

Hi Folks,
Can i use one interface to load data into 2 different tables(same schema or different schemas) from one source table with same structure ?
Please give me advice
Thanks
Raj
Edited by: user11410176 on Oct 21, 2009 9:55 AM

Hi Lucky,
Thanks for your reply,
What iam trying is ...Iam trying to load the data from legacy tables(3) into oracle staging tables.But i need to load the same source data into two staging tables(these staging tables are in two different schemas)
can i load this source data into two staging tables by using single standard interface(some business logic is there)
If i can then give me some suggestion how to do that
Thanks in advance
Raj

Can we have abstract interface

can we have abstract interface if so wats the significance of it?
plz give me an example

public abstract interface AbstractInterface {
}The compiler allows it, so you can have them. But as said it's redundant and discouraged.

Problem:Can't instantiate class

I tried for many hours to solve the problem but in vain.
here is the Exception i got from tomcat:javax.servlet.ServletException: javax.servlet.jsp.JspException: javax.faces.FacesException: javax.faces.FacesException: Can't instantiate class: 'core.walid.NwindManagedBean'.. core.walid.NwindManagedBean
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:844)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:91)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:362)
     com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322)
     com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130)
     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.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:362)
cause m�re
javax.faces.el.EvaluationException: javax.faces.FacesException: javax.faces.FacesException: Can't instantiate class: 'core.walid.NwindManagedBean'.. core.walid.NwindManagedBean
     com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:206)
     com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:154)
     javax.faces.component.UIData.getValue(UIData.java:527)
     javax.faces.component.UIData.getDataModel(UIData.java:856)
     javax.faces.component.UIData.setRowIndex(UIData.java:379)
     com.sun.faces.renderkit.html_basic.TableRenderer.encodeBegin(TableRenderer.java:65)
     javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:683)
     javax.faces.component.UIData.encodeBegin(UIData.java:681)
     javax.faces.webapp.UIComponentTag.encodeBegin(UIComponentTag.java:591)
     javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:543)
     com.sun.faces.taglib.html_basic.DataTableTag.doEndTag(DataTableTag.java:491)
     org.apache.jsp.index_jsp._jspx_meth_h_dataTable_0(index_jsp.java:161)
     org.apache.jsp.index_jsp._jspx_meth_c_view_0(index_jsp.java:116)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:80)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:362)
     com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322)
     com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130)
     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.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:362)here is the bean i don't see any problelme it uses JDBC to access the database/*
* NwindManagedBean.java
* Created on 4 mars 2007, 01:02
package Core.walid;
import java.sql.*;
import javax.sql.*;
import java.util.ArrayList;
import java.util.Collection;
import java.io.*;
import javax.servlet.jsp.jstl.sql.*;
* @author walid
public class NwindManagedBean implements Serializable{
    private String tableName="Customers";
    private ResultSet resultSet;
    private Connection connection;
    /** Creates a new instance of NwindManagedBean */
    public NwindManagedBean() {
    public String getTableName(){
    return tableName;
    public void setTableName(String tableName){
    this.tableName=tableName;
    public void open(){
    String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
    String url = "jdbc:odbc:Nwind";
    String username = "";
    String password = "";
    try{
        Class.forName(driver);
        connection =DriverManager.getConnection(url,username,password);}
    catch(Exception e){System.out.println(e);}
    public void search(){
      try{ Statement statement=connection.createStatement();
       String query ="select * from "+tableName;
        resultSet=statement.executeQuery(query);
    catch(Exception cnfe) {};
    public ResultSet getResultSet(){
        open();
        search();
        return resultSet;
    public void showResults(){
        int i=1;
       try{ while(resultSet.next())
        System.out.println(resultSet.getString(i));
        i++;
       catch(Exception e){System.out.println("erreur sql"+e);}
}i declared the bean in faces-config<faces-config>
    <managed-bean>
        <managed-bean-name>NwindManagedBean</managed-bean-name>
        <managed-bean-class>core.walid.NwindManagedBean</managed-bean-class>
        <managed-bean-scope>request</managed-bean-scope>
    </managed-bean>
</faces-config>and finally the jsf page to list the database contents<%@ taglib uri="http://java.sun.com/jsf/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<html>
   <HEAD><TITLE>Northwind Customers</title>
    </HEAD>
    <body>
        <center>
            <table border="5">
                <tr><th class="Northwind customers"></th></tr>
            </table>
            <p>
            <c:view>
                <h:dataTable value="#{NwindManagedBean.resultSet}"
                var="dbRow"
                border="1"
                >
                <h:column>
                <c:facet name="header">
                <c:verbatim>Company name</c:verbatim>
                </c:facet>
                <h:outputText value="#{dbRow.CompanyName}"/>
                </h:column>
                <h:column>
                <c:facet name="header">
                <c:verbatim>Address</c:verbatim>
                </c:facet>
                <h:outputText
                value="#{dbRow.Address}"/>
                </h:column>
                <h:column>
                <c:facet name="header">
                <c:verbatim>City</c:verbatim>
                </c:facet>
                <h:outputText
                value="#{dbRow.City}"/>
                </h:column>
                </h:dataTable>
            </c:view>
            </center>
    </body>
</html>

Hello,
I'm not sure, but i would try to put the package only in lowercase.
Your class pakageis declared with first Upper case letter.
And in you faces-config file, you declared with lower case.
Note : it's recommanded to use only lower case for package name.
Regards,
Sebastien Degardin

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Feature Request/Bug Report Form
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* Uninstall the current Firefox version, but make sure that you do not remove your personal data.
* Install the new Firefox version of the wanted language.
See also:
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Hi,
I am using jsf 1.1
I am trying to populate a simple drop down in MyJsp.jsp with the List values generated in ContactsListBean.java. I am copying the code here for reference.
when I launch the page (forwarding to this MyJsp.jsp in index.jsp) I am getting this error below. Can anyone help me out what is it that I am doing wrong?? I am unable to trace out what's wrong. I have even tried the same logic with h:selectOneListbox also but I get the same error..
Any help/advice would be highly appreciated, Thanks in advance.
org.apache.jasper.JasperException: javax.servlet.jsp.JspException: javax.faces.FacesException: javax.faces.FacesException: Can't instantiate class: ''.
*     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:460)*
*     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)*
*     com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322)*
*     com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:147)*
*     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:71)*
*     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)*
MyJsp.jsp
<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
     <title>My JSF 'MyJsp.jsp' starting page</title>
     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     
</head>
<body>
   <f:view>
         This is my JSF JSP page. <br><h:form>
     <h:selectOneMenu id="loc1" value="#{contactsListBean.selectedLocation}">
             <f:selectItems id="ll1" value="#{contactsListBean.locationList}"/>
                </h:selectOneMenu>
    </h:form>
</f:view>
</body>
</html>
ContactsListBean.java
public class ContactsListBean {
     private java.util.List locationList = new ArrayList();;
     private java.lang.String selectedLocation;
     public ContactsListBean() {
          System.out.println("Construnction list....");
          locationList.add(new SelectItem("test1","test1",""));
          locationList.add(new SelectItem("test2","test2",""));
          locationList.add(new SelectItem("test3","test3",""));
     public java.util.List getLocationList() {
           System.out.println("returning LIST OF SIZE "+locationList.size());
           return locationList;
     public void setLocationList(java.util.List locationList) {
          this.locationList = locationList;
          System.out.println("got list size..."+locationList.size());
     public java.lang.String getSelectedLocation() {
          return selectedLocation;
     public void setSelectedLocation(java.lang.String selectedLocation) {
          this.selectedLocation = selectedLocation;
faces-config.xml
<?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>
<managed-bean>
<managed-bean-name>contactsListBean</managed-bean-name>
<managed-bean-class>ContactsListBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
<managed-property>
   <property-name>locationList</property-name>
   <property-class>java.util.List</property-class>
   <value/>
</managed-property>
<managed-property>
   <property-name>selectedLocation</property-name>
   <property-class>java.lang.String</property-class>
   <value/>
</managed-property>
</managed-bean>
</faces-config>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<context-param>
    <param-name>javax.faces.CONFIG_FILES</param-name>
    <param-value>/WEB-INF/faces-config.xml</param-value>
</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>
</web-app>

Your class is now been put in a package? Good, now the next step is to remove all of those managed-property entries from the faces-config.xml. It makes no sense because 1) you already created the list in the backing bean and 2) you didn't assign any value to the item in the managed property.

Can't instantiate JSF Custom Component

I'm hoping some of you expert (or at least seasoned) JSF custom component developers might be able to lend some insight into the "Can't instantiate class" problem. I have a custom component which extends another component (which happens to be Oracle ADF's panelGroup), and I've verified that everything is in place:
1. Component class uses correct component type referenced by faces-config.xml and tag class
2. Renderer type referenced in faces-config.xml matches that of the renderer type in component class
3. There is a default constructor (no args) for the component class, which also sets the renderer type
4. TLD with tag is correct
All classes are definitely in the classpath, as I have another custom component in the same packages which loads and is used just fine.
Any ideas would be appreciated.
Thanks,
Shawn Bertrand
Tyco Electronics

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