How to handle null pointer exception

dEAR ALL
how to handle null pointer exception
public void xxperscompmatchcase(OAPageContext pageContext,
OAWebBean webBean,String cid,String pid)
xxcrmleadperslastnameVOImpl vo=getxxcrmleadperslastnameVO();
xxcrmleadcompnameVOImpl vo1=getxxcrmleadcompnameVO();
vo.setWhereClauseParams(null);
vo1.setWhereClauseParams(null);
vo.setWhereClauseParam(0,pid);
vo1.setWhereClauseParam(0,cid);
vo.executeQuery();
vo1.executeQuery();
String compname="";
String plname="";
if(vo1.first().getAttribute("CompName")!=null)
compname=(String)vo1.first().getAttribute("CompName");
else
compname="";
if((String)vo.first().getAttribute("PersLastname")!=null)
plname=(String)(String)vo.first().getAttribute("PersLastname");
else
plname="";
OAFormattedTextBean p =
(OAFormattedTextBean)webBean.findChildRecursive("personmatchcase");
OAFormattedTextBean b =
(OAFormattedTextBean)webBean.findChildRecursive("matchcase");
b.setValue(pageContext,
"The Lead is matched to company " + compname.toUpperCase());
p.setValue(pageContext,
"The Lead is matched to person " + plname.toUpperCase());
it is going to null pointer exception
how to handle this exception

Hi,
try
//Write your logic here, which can generate any exception
catch(Exception e)
//Write your exception specific code here
Regards,
Reetesh Sharma

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    i. I am trying to add a UDF (using Advanced>User Configuration..Attributes) to a fully configured OIM i.e. oim with reconciliation and provisioning from and to resources but it throws a null pointer exception. Look at the log, I see
    ===============Excerpt form the log file==========
    [2012-01-26T11:28:14.447-05:00] [oim_server1] [NOTIFICATION] [] [oracle.iam.platform.authz.impl] [tid: [ACTIVE].ExecuteThread: '3' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: xelsysadm] [ecid: 0000JKQq8vZ8dpC5nFk3yZ1Evvpt000LzY,0] [APP: oim#11.1.1.3.0] [dcid: c62f3a4b80d21e6f:ef93519:134587d39c4:-7ffd-0000000000022a3e] [[
    ---Stack Trace Begins[[This is not an exception. For debugging purposes]]---
    oracle.iam.platform.authz.impl.OESAuthzServiceImpl.doCheckAccess(OESAuthzServiceImpl.java:210)
    oracle.iam.platform.authz.impl.OESAuthzServiceImpl.hasAccess(OESAuthzServiceImpl.java:188)
    oracle.iam.platform.authz.impl.OESAuthzServiceImpl.hasAccess(OESAuthzServiceImpl.java:180)
    oracle.iam.platform.authz.impl.AuthorizationServiceImpl.hasAccess(AuthorizationServiceImpl.java:173)
    oracle.iam.configservice.impl.ConfigManagerImpl.checkAuthorization(ConfigManagerImpl.java:1899)
    oracle.iam.configservice.impl.ConfigManagerImpl.addAttribute(ConfigManagerImpl.java:177)
    oracle.iam.configservice.api.ConfigManagerEJB.addAttributex(Unknown Source)
    ... 21 lines skipped..
    oracle.iam.configservice.api.ConfigManager_5u0nrx_ConfigManagerRemoteImpl.addAttributex(ConfigManager_5u0nrx_ConfigManagerRemoteImpl.java:864)
    ... 13 lines skipped..
    oracle.iam.configservice.api.ConfigManagerDelegate.addAttribute(Unknown Source)
    oracle.iam.configservice.agentry.config.CreateAttributeActor.perform(CreateAttributeActor.java:266)
    oracle.iam.consoles.faces.mvc.canonic.Model.perform(Model.java:547)
    oracle.iam.consoles.faces.mvc.admin.Model.perform(Model.java:324)
    oracle.iam.consoles.faces.mvc.canonic.Controller.doPerform(Controller.java:255)
    oracle.iam.consoles.faces.mvc.canonic.Controller.doSelectAction(Controller.java:178)
    oracle.iam.consoles.faces.event.NavigationListener.processAction(NavigationListener.java:97)
    ... 24 lines skipped..
    oracle.iam.platform.auth.web.PwdMgmtNavigationFilter.doFilter(PwdMgmtNavigationFilter.java:115)
    ... weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    oracle.iam.platform.auth.web.OIMAuthContextFilter.doFilter(OIMAuthContextFilter.java:100)
    ... 15 lines skipped..
    weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
    ---Stack Tracefor this call Ends---
    [2012-01-26T11:28:14.447-05:00] [oim_server1] [NOTIFICATION] [IAM-1010010] [oracle.iam.platform.authz.impl] [tid: [ACTIVE].ExecuteThread: '3' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: xelsysadm] [ecid: 0000JKQq8vZ8dpC5nFk3yZ1Evvpt000LzY,0] [APP: oim#11.1.1.3.0] [dcid: c62f3a4b80d21e6f:ef93519:134587d39c4:-7ffd-0000000000022a3e] [arg: 1] [arg: null] [arg: USER_MANAGEMENT_CONFIG] [arg: CREATE_ATTRIBUTE] ********** Entering the Authorization Segment with parameters:: LoggedInUserId = 1, target resourceID = null, Feature = USER_MANAGEMENT_CONFIG, Action = CREATE_ATTRIBUTE **********
    [2012-01-26T11:28:14.448-05:00] [oim_server1] [NOTIFICATION] [IAM-1010021] [oracle.iam.platform.authz.impl] [tid: [ACTIVE].ExecuteThread: '3' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: xelsysadm] [ecid: 0000JKQq8vZ8dpC5nFk3yZ1Evvpt000LzY,0] [APP: oim#11.1.1.3.0] [dcid: c62f3a4b80d21e6f:ef93519:134587d39c4:-7ffd-0000000000022a3e] [arg: [InternalObligation: name: noop, values: [true], convertToObligation: false, InternalObligation: name: noop, values: [true], convertToObligation: false]] Validating the Internal Obligations: [InternalObligation: name: noop, values: [true], convertToObligation: false, InternalObligation: name: noop, values: [true], convertToObligation: false]
    [2012-01-26T11:28:14.448-05:00] [oim_server1] [NOTIFICATION] [IAM-1010022] [oracle.iam.platform.authz.impl] [tid: [ACTIVE].ExecuteThread: '3' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: xelsysadm] [ecid: 0000JKQq8vZ8dpC5nFk3yZ1Evvpt000LzY,0] [APP: oim#11.1.1.3.0] [dcid: c62f3a4b80d21e6f:ef93519:134587d39c4:-7ffd-0000000000022a3e] ---------- The list of Internal Obligation is satisfied, returning TRUE ----------
    [2012-01-26T11:28:14.448-05:00] [oim_server1] [NOTIFICATION] [IAM-1010026] [oracle.iam.platform.authz.impl] [tid: [ACTIVE].ExecuteThread: '3' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: xelsysadm] [ecid: 0000JKQq8vZ8dpC5nFk3yZ1Evvpt000LzY,0] [APP: oim#11.1.1.3.0] [dcid: c62f3a4b80d21e6f:ef93519:134587d39c4:-7ffd-0000000000022a3e] [arg: Decision :PERMIT\nObligations from policy: ] ********** Exiting the Authorization Segment with result Decision :PERMIT[[
    =============Excerpt ends==============
    Is there a reason why this is and how do I get by it.
    ii. Can I just add the field directly within the MDS>file/user.xml? Would there be an issue with changing an existing attribute metadata using the user.xml?

    Pradeep thank you for your response. it was helpful. However, I also found the responses to both my questions.
    i. The null pointer exception was due to using a complex query I was using in the LOV query. I tried a simple query and that worked fine.
    ii. For modifying the user defined attributes one can consult the following forum post:
    OIM 11g - Change UDF Field Type form String to LOV
    Thanks

  • Why am I receiving Null pointer Exception Error.

    why am I receiving Null pointer Exception Error.
    Hi I am developing a code for login screen. There is no syntex error as such ut I am receving the aove mentioned error. Can some one please help me ??
    ------------ Main.java------------------
    import java.io.*;
    import java.awt.*;
    import java.awt.event.*;
    import java.sql.*;
    public class Main implements ActionListener
    Frame mainf;
    MenuBar mb;
    MenuItem List,admitform,inquiry,exit,helpn;
    Menu newm,update,help;
    Inquiry iq;
    Admit ad;
    // HosHelp hp;
    Howuse hu;
    Register reg;
    Main()
    mainf=new Frame(" Engg College V/S Mumbai University ");
         mb=new MenuBar();
         newm=new Menu(" New ");
         update=new Menu(" Update ");
         help=new Menu(" Help ");
         List=new MenuItem("List");
         admitform=new MenuItem("Admit");
         inquiry=new MenuItem("Inquiry");
         exit=new MenuItem("Exit");
         helpn=new MenuItem("How to Use?");
    newm.add(List);
                   newm.add(admitform);
    newm.add(inquiry);
                   newm.add(exit);
         help.add(helpn);
              mb.add(newm);
              mb.add(update);
              mb.add(help);
    mainf.setMenuBar(mb);
                   exit.addActionListener(this);
                   List.addActionListener(this);
         inquiry.addActionListener(this);
         admitform.addActionListener(this);
    helpn.addActionListener(this);
         mainf.setSize(400,300);
         mainf.setVisible(true);
    public void actionPerformed(ActionEvent ae)
    if (ae.getSource()==List)
              reg=new Register();
         if(ae.getSource()==inquiry)
         iq=new Inquiry();
    if(ae.getSource()==admitform)
         ad=new Admit();
              if(ae.getSource()==helpn)
              hu=new Howuse();
              if(ae.getSource()==exit)
         mainf.setVisible(false);
    public static void main(String args[])
              new Main();
    -------------Register.java---------------------------
    import java.awt.*;
    import java.awt.event.*;
    import java.sql.*;
    public class Register implements ActionListener//,ItemListener
    Label id,name,login,pass,repass;
    Button ok,newu,cancel,check;
    Button vok,iok,lok,mok,sok; //buttons for dialog boxes
    TextField idf,namef,loginf,passf,repassf;
    Dialog valid,invlog,less,mismat,acucreat;
    Frame regis;
    Checkbox admin,limit;
    CheckboxGroup type;
    DBconnect db;
    Register()
         db=new DBconnect();
    regis=new Frame("Registeration Form");
              type=new CheckboxGroup();
              admin=new Checkbox("Administrator",type,true);
              limit=new Checkbox("Limited",type,false);
              id=new Label("ID :");
    name=new Label("Name :");
         login=new Label("Login :");
         pass=new Label("Password :");
         repass=new Label("Retype :");
    idf =new TextField(20); idf.setEnabled(false);
         namef=new TextField(30); namef.setEnabled(false);
    loginf=new TextField(30); loginf.setEnabled(false);
         passf=new TextField(30); passf.setEnabled(false);
         repassf=new TextField(30); repassf.setEnabled(false);
    ok=new Button("OK"); ok.setEnabled(false);
         newu=new Button("NEW");
    cancel=new Button("Cancel");
         check=new Button("Check Login"); check.setEnabled(false);
    vok=new Button("OK");
         iok=new Button("OK");
              lok=new Button("OK");
              mok=new Button("OK");
              sok=new Button("OK");
    valid=new Dialog(regis,"Login name is valid !");
         invlog=new Dialog(regis,"Login name already exist!");
         less=new Dialog(regis,"Password is less than six characters !");
    mismat=new Dialog(regis,"password & retyped are not matching !");
    acucreat=new Dialog(regis,"You have registered successfully !");
         regis.setLayout(null);
    //     regis.setBackground(Color.orange);
    valid.setLayout(new FlowLayout());
         invlog.setLayout(new FlowLayout());
         less.setLayout(new FlowLayout());
         mismat.setLayout(new FlowLayout());
    acucreat.setLayout(new FlowLayout());
    id.setBounds(35,50,80,25); //(left,top,width,hight)
    idf.setBounds(125,50,40,25);
    name.setBounds(35,85,70,25);
    namef.setBounds(125,85,150,25);
    login.setBounds(35,120,80,25);
    loginf.setBounds(125,120,80,25);
    check.setBounds(215,120,85,25);
         pass.setBounds(35,155,80,25);
    passf.setBounds(125,155,80,25);
    repass.setBounds(35,190,80,25);
    repassf.setBounds(125,190,80,25);
    admin.setBounds(35,225,100,25);
    limit.setBounds(145,225,100,25);
              ok.setBounds(45,265,70,25);
         newu.setBounds(135,265,70,25);
    cancel.setBounds(225,265,70,25);
         passf.setEchoChar('*');
    repassf.setEchoChar('*');
         regis.add(id);
         regis.add(idf);
    regis.add(name);
         regis.add(namef);
         regis.add(login);
         regis.add(loginf);
         regis.add(check);
    regis.add(pass);
         regis.add(passf);
    regis.add(repass);
         regis.add(repassf);
         regis.add(ok);
         regis.add(newu);
         regis.add(cancel);
    regis.add(admin);
         regis.add(limit);
    valid.add(vok);
         invlog.add(iok);     
         less.add(lok);
         mismat.add(mok);
    acucreat.add(sok);
    ok.addActionListener(this);
         newu.addActionListener(this);
    check.addActionListener(this);
    cancel.addActionListener(this);
         // limit.addItemListener(this);
         //admin.addItemListener(this);
              vok.addActionListener(this);
              iok.addActionListener(this);
         lok.addActionListener(this);
         mok.addActionListener(this);
         sok.addActionListener(this);
    regis.setLocation(250,150);
    regis.setSize(310,300);
    regis.setVisible(true);
         public void actionPerformed(ActionEvent ae)
         if(ae.getSource()==check)
              try{
                   String s2=loginf.getText();
    ResultSet rs=db.s.executeQuery("select* from List");
                        while(rs.next())
                   if(s2.equals(rs.getString(2).trim()))
    //                    invlog.setBackground(Color.orange);
                             invlog.setLocation(250,150);
                             invlog.setSize(300,100);
                   cancel.setEnabled(false);
    ok.setEnabled(false);
    check.setEnabled(false);
                        invlog.setVisible(true);
                             break;
                        else
                        //     valid.setBackground(Color.orange);
                             valid.setLocation(250,150);
                             valid.setSize(300,100);
                   cancel.setEnabled(false);
    ok.setEnabled(false);
    check.setEnabled(false);
                   valid.setVisible(true);
                        }catch(Exception e)
                   e.printStackTrace();
    if(ae.getSource()==newu)
         try{
              ResultSet rs=db.s.executeQuery("select max(ID) from List");
         while(rs.next())
    String s1=rs.getString(1).trim();
                   int i=Integer.parseInt(s1);
    i++;
                   String s2=""+i;
    idf.setText(s2);
                   newu.setEnabled(false);
                   namef.setText(""); namef.setEnabled(true);
              loginf.setText(""); loginf.setEnabled(true);
              passf.setText(""); passf.setEnabled(true);
              repassf.setText(""); repassf.setEnabled(true);
              ok.setEnabled(true);
                   check.setEnabled(true);
                   }catch(Exception e)
              e.printStackTrace();
         if(ae.getSource()==ok)
              try
              String s1=idf.getText();
              String s2=loginf.getText();
              String s3=passf.getText();
         String s4=repassf.getText();
         int x=Integer.parseInt(s1);
         int t;
         if(type.getSelectedCheckbox()==admin)
              t=1;
              else
              t=0;
    ResultSet rs=db.s1.executeQuery("select* from List");
                   while(rs.next())
                   if(s2.equals(rs.getString(2).trim()))
                        invlog.setBackground(Color.orange);
                        invlog.setLocation(250,150);
                        invlog.setSize(300,100);
                   cancel.setEnabled(false);
    ok.setEnabled(false);
    check.setEnabled(false);
                        invlog.setVisible(true);
                        break;
                   else
                        if (s3.length()<6)
                        less.setBackground(Color.orange);
                             less.setLocation(250,150);
                             less.setSize(300,100);
                   ok.setEnabled(false);
                        cancel.setEnabled(false);
                        check.setEnabled(false);
                        less.setVisible(true);
    else if(!(s3.equals(s4)))
                        mismat.setBackground(Color.orange);
                        mismat.setLocation(250,150);
                        mismat.setSize(300,100);
                        ok.setEnabled(false);
                        cancel.setEnabled(false);
                        check.setEnabled(false);
                        mismat.setVisible(true);
                        else
    db.s1.execute("insert into User values("+x+",'"+s2+"','"+s3+"',"+t+")");
                        acucreat.setBackground(Color.orange);
                        acucreat.setLocation(250,150);
                        acucreat.setSize(300,100);
                        regis.setVisible(false);
                        acucreat.setVisible(true);
                   }//else
              }//while
                   } //try
              catch(Exception e1)
              // e1.printStackTrace();
              if (ae.getSource()==cancel)
              regis.setVisible(false);
              if (ae.getSource()==vok)
              ok.setEnabled(true);
                   cancel.setEnabled(true);
    check.setEnabled(true);
                   valid.setVisible(false);
              if (ae.getSource()==iok)
              ok.setEnabled(true);
                   cancel.setEnabled(true);
    check.setEnabled(true);
                   invlog.setVisible(false);
              if (ae.getSource()==lok)
              less.setVisible(false);
                   cancel.setEnabled(true);
    ok.setEnabled(true);
    check.setEnabled(true);
              if (ae.getSource()==mok)
              mismat.setVisible(false);
                   cancel.setEnabled(true);
    ok.setEnabled(true);
    check.setEnabled(true);
    if (ae.getSource()==sok)
              acucreat.setVisible(false);
              ok.setEnabled(false);
                   newu.setEnabled(true);
                   regis.setVisible(true);
         public static void main(String args[])
         new Register();
    -----------DBConnect.java------------------------------------
    import java.sql.*;
    public class DBconnect
    Statement s,s1;
    Connection c;
    public DBconnect()
    try
         Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
              c=DriverManager.getConnection("jdbc:odbc:Sonal");
              s=c.createStatement();
    s1=c.createStatement();
         catch(Exception e)
         e.printStackTrace();
    ----------Login.java----------------
    import java.awt.*;
    import java.awt.event.*;
    import java.sql.*;
    public class Login implements ActionListener
    Frame log;
    Label login,pass;
    TextField loginf,passf;
    Button ok,cancel;
    Dialog invalid;
    Button iok;
    Register reg;
    DBconnect db;
    Main m;
    Login()
    db=new DBconnect();
         log=new Frame();
         log.setLocation(250,210);
         login=new Label("Login :");
    pass=new Label("Password :");
         loginf=new TextField(20);
         passf=new TextField(20);
         passf.setEchoChar('*');
         ok=new Button("OK");
         // newu=new Button("New User");
         cancel=new Button("CANCEL");
         iok=new Button(" OK ");
    invalid=new Dialog(log,"Invalid User!");
    //log.setBackground(Color.cyan);
    //log.setForeground(Color.black);
         log.setLayout(null);
         // iok.setBackground(Color.gray);
         invalid.setLayout(new FlowLayout());
         login.setBounds(35,50,70,25); //(left,top,width,hight)
         loginf.setBounds(105,50,100,25);
         pass.setBounds(35,85,70,25);
         passf.setBounds(105,85,70,25);
         ok.setBounds(55,130,70,25);
    // newu.setBounds(85,120,80,25);
    cancel.setBounds(145,130,70,25);
    log.add(login);
    log.add(loginf);
    log.add(pass);
    log.add(passf);
    log.add(ok);
    // log.add(newu);
    log.add(cancel);
         invalid.add(iok);//,BorderLayout.CENTER);
    ok.addActionListener(this);
    // newu.addActionListener(this);
    cancel.addActionListener(this);
         iok.addActionListener(this);
    log.setSize(300,170);
    log.setVisible(true);
    public void actionPerformed(ActionEvent a)
    if(a.getSource()==ok)
         try{
              String l=loginf.getText();
              String p=passf.getText();
              ResultSet rs=db.s.executeQuery("select * from List");
              while(rs.next())
              if(l.equals(rs.getString(2).trim())&& p.equals(rs.getString(3).trim()))
                        String tp=rs.getString(4).trim();
                             int tp1=Integer.parseInt(tp);
    log.setVisible(false);
    if(tp1==1)
                             m=new Main();
                        // m.List.setEnabled(true);
                             else
                             m=new Main();
                             m.List.setEnabled(false);
                        break;
    else
                   invalid.setBackground(Color.orange);
                   invalid.setSize(300,100);
                   invalid.setLocation(250,210);
                   cancel.setEnabled(false);
              ok.setEnabled(false);
                   invalid.setVisible(true);
                   }catch(Exception e1)
                   e1.printStackTrace();
         if (a.getSource()==cancel)
         log.setVisible(false);
         if (a.getSource()==iok)
         invalid.setVisible(false);
         loginf.setText("");
         passf.setText("");
         cancel.setEnabled(true);
    ok.setEnabled(true);
         public static void main(String[] args)
         new Login();
    -------------inquiry.java---------------------------------
    import java.awt.*;
    import java.awt.event.*;
    import java.util.*;
    import java.util.Date;
    import java.text.*;
    import java.sql.*;
    public class Inquiry implements ActionListener
    Frame inqry;
    Label name,addr;
    TextField namef,addrf;
    Button ok,cancel,dok;
    Dialog invalid;
    Frame result; //Result of the inquiry....
    Label lrname,lraddr,lward,lrdate,lcdate;
    TextField rname,raddr,ward,rdate,cdate;
    Date d;
    DateFormat df;
    Button rok,rcancel;
    Dialog success;
    Button rdok;
    DBconnect db;
    Inquiry()
              db=new DBconnect();
              inqry=new Frame("Inquiry Form");
              inqry.setLayout(null);
    inqry.setBackground(Color.cyan);
              name=new Label(" NAME ");
              addr=new Label("ADDRESS");
              namef=new TextField(20);
              addrf=new TextField(20);
              ok=new Button("OK");
              cancel=new Button("CANCEL");
              dok=new Button("OK");
              invalid=new Dialog(inqry,"Invalid Name or Address !");
              invalid.setSize(300,100);
         invalid.setLocation(300,180);
              invalid.setBackground(Color.orange);
              invalid.setLayout(new FlowLayout());
    result=new Frame(" INQUIRY RESULT "); //Result Window......
    result.setLayout(null);
    result.setBackground(Color.cyan);
    lcdate=new Label(" DATE ");
         lrname=new Label(" NAME ");
    lraddr=new Label(" ADDRESS ");
         lward=new Label(" WARD ");
         lrdate=new Label(" ADMIT-DATE ");
    cdate=new TextField(10);
         rname=new TextField(20);
    rname.setEnabled(false);
         raddr=new TextField(20);
         raddr.setEnabled(false);
         ward=new TextField(20);
         ward.setEnabled(false);
         rdate=new TextField(10);
         rdate.setEnabled(false);
         cdate=new TextField(20);
         d=new Date();
         df=DateFormat.getDateInstance(DateFormat.MEDIUM,Locale.KOREA);
         cdate.setText(df.format(d));
         cdate.setEnabled(false);
    rok=new Button(" OK ");
         rcancel=new Button("CANCEL");
              name.setBounds(40,50,50,25);
    namef.setBounds(120,50,130,25);
    addr.setBounds(40,100,60,25);
    addrf.setBounds(120,100,80,25);
    ok.setBounds(60,145,70,25);
              cancel.setBounds(140,145,70,25);
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