Convert Object to short

I have a vector (vFields) where :
vField(0) = object of 'short field1'
vField(1) = object of 'short field2'
vField(2) = object of 'short field3'
vField(3) = object of 'short field4'
vField(4) = object of 'int field5'
I managed to store respective fields as follows, at least I think i have...
vFields.addElement((Object)(new Short(data.getField1())));
vFields.addElement((Object)(new Short(data.getField2())));
vFields.addElement((Object)(new Short(data.getField3())));
vFields.addElement((Object)(new Short(data.getField4())));
vFields.addElement((Object)(new Integer(data.getField5())));
Now i need to restore the fields but can't find how...
For the 'int' field I tried following:
Integer helpField5 = (Integer)vFields.elementAt(4);
int field5 = helpField5.intValue()

You don't need the casts to Object in the code you show. A cast to Object is always a widening cast, and they are always implictly performed.
To get a short value from an Object reference that points to a Short object, just do:
short s = ((Short) o).shortValue();
Note that you can also cast the reference to Number, and the code will work no matter what subclass of Number the object is an instance of:
short s = ((Number) o).shortValue();

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Edited by: JongpilKim on May 17, 2009 10:48 PM
Edited by: JongpilKim on May 17, 2009 10:51 PM
Edited by: JongpilKim on May 17, 2009 10:53 PM

thanks a lot for your reply.
now, i use udp socket for communication, but, i must use hardware pci communication later.
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for convert a object to byte array,
i used ObjectInputStream before, but it was so slow.
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in c language, if i use struct, i can send struct data to copy memory by socket and it's very fast.
Edited by: JongpilKim on May 18, 2009 5:26 PM

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I think I've found the answer myself ;-)
Never thought I could use something like int.class or double.class,
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How would someone convert an object of say (String, int, double, String) into a readable string. I tried the toString() method but all I get is something like this
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import cs1.Keyboard;
import java.io.*;
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String newName;
int newSocial;
double newGPAs;
String newMajors;
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public Student student;
public StudentNode next;
public StudentNode()
next = null;
student = null;
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student = d;
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next = n;
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METHOD NAME: StudentNode
AUTHOR:
DATE OF CREATION: Nov 20, 2004
DATE OF UPDATES: Nov 28, 2004
PURPOSE: Acts as a node for the Student list
ALGORITHM:Acts as node for the list
INSTANCE VARIABLES: none
student = newStudent;
next = null;
public class Student
private String name;
private int social;
private double GPA;
private String Major;
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METHOD NAME: Student
AUTHOR:
DATE OF CREATION: Nov 20, 2004
DATE OF UPDATES: Nov 28, 2004
PURPOSE: The actual Student class, determines what is allowed in the array
ALGORITHM:Declare what variables will be needed for the program
INSTANCE VARIABLES: String name, int social, double GPA, String Major
name = newName;
social = newSocial;
GPA = newGPAs;
Major = newMajors;
import java.io.*;
import cs1.Keyboard;
import java.io.BufferedWriter;
import java.util.*;
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METHOD NAME: StudentList12
AUTHOR:
DATE OF CREATION: Nov 20, 2004
DATE OF UPDATES: Nov 28, 2004
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DATE OF CREATION: Nov 20, 2004
DATE OF UPDATES: Nov 28, 2004
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try
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I am using the following code to convert an object into XML:
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