Why did I get this error : java.lang.Exception: XMLEncoder: discarding statement Vector.add() ?
- by Frank
My Java program look like this :
public class Biz_Manager
{
static Contact_Info_Setting Customer_Contact_Info_Panel;
static XMLEncoder XML_Encoder;
......
void Get_Customer_Agent_Shipping_Company_And_Shipping_Agent_Net_Worth_Info()
{
try
{
XML_Encoder=new XMLEncoder(new BufferedOutputStream(new FileOutputStream(Customer_Contact_Info_Panel.Contact_Info_File_Path)));
XML_Encoder.writeObject(Customer_Contact_Info_Panel.Contacts_Vector);
}
catch (Exception e) { e.printStackTrace(); }
finally
{
if (XML_Encoder!=null)
{
XML_Encoder.close(); // <== Error here , line : 9459
XML_Encoder=null;
}
}
}
}
// =======================================================================
public class Contact_Info_Setting extends JPanel implements ActionListener,KeyListener,ItemListener
{
public static final long serialVersionUID=26362862L;
......
Vector<Contact_Info_Entry> Contacts_Vector=new Vector<Contact_Info_Entry>();
......
}
// =======================================================================
package Utility;
import java.io.*;
import java.util.*;
import javax.jdo.annotations.IdGeneratorStrategy;
import javax.jdo.annotations.IdentityType;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.Persistent;
import javax.jdo.annotations.PrimaryKey;
@PersistenceCapable(identityType=IdentityType.APPLICATION)
public class Contact_Info_Entry implements Serializable
{
@PrimaryKey
@Persistent(valueStrategy=IdGeneratorStrategy.IDENTITY)
public Long Id;
public static final long serialVersionUID=26362862L;
public String Contact_Id="",First_Name="",Last_Name="",Company_Name="",Branch_Name="",Address_1="",Address_2="",City="",State="",Zip="",Country="";
......
public boolean B_1;
public Vector<String> A_Vector=new Vector<String>();
public Contact_Info_Entry() { }
public Contact_Info_Entry(String Other_Id) { this.Other_Id=Other_Id; }
......
public void setId(Long value) { Id=value; }
public Long getId() { return Id; }
public void setContact_Id(String value) { Contact_Id=value; }
public String getContact_Id() { return Contact_Id; }
public void setFirst_Name(String value) { First_Name=value; }
public String getFirst_Name() { return First_Name; }
public void setLast_Name(String value) { Last_Name=value; }
public String getLast_Name() { return Last_Name; }
public void setCompany_Name(String value) { Company_Name=value; }
public String getCompany_Name() { return Company_Name; }
......
}
I got this error message :
java.lang.Exception: XMLEncoder: discarding statement Vector.add(Contact_Info_Entry);
Continuing ...
java.lang.Exception: XMLEncoder: discarding statement Vector.add(Contact_Info_Entry);
Continuing ...
java.lang.Exception: XMLEncoder: discarding statement Vector.add(Contact_Info_Entry);
Continuing ...
java.lang.Exception: XMLEncoder: discarding statement Vector.add(Contact_Info_Entry);
Continuing ...
Exception in thread "Thread-8" java.lang.NullPointerException
at java.beans.XMLEncoder.outputStatement(XMLEncoder.java:611)
at java.beans.XMLEncoder.outputValue(XMLEncoder.java:552)
at java.beans.XMLEncoder.outputStatement(XMLEncoder.java:682)
at java.beans.XMLEncoder.outputStatement(XMLEncoder.java:687)
at java.beans.XMLEncoder.outputValue(XMLEncoder.java:552)
at java.beans.XMLEncoder.flush(XMLEncoder.java:398)
at java.beans.XMLEncoder.close(XMLEncoder.java:429)
at Biz_Manager.Get_Customer_Agent_Shipping_Company_And_Shipping_Agent_Net_Worth_Info(Biz_Manager.java:9459)
Seems it can't deal with vector, why ? Anything wrong ? How to fix it ?
Frank
