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Message:

loading arrays of objects from a binary file

Posted by nbear on May 02, 2001 at 10:22 PM

Is anybody able to help with examples of loading an array of objects from a
binary file.
I have created a class called ShareDetail with instance variables of
private String name;
private int noOfShares;
private int purDate;
private double purPrice;
private double curPrice;

I am now trying to load the array from a binary file as follows and I don't
know what I doing wrong?
import java.io.*;

public class Portfolio
{
public static void main(String[] args) throws IOException
{
ShareDetail[] shareList = new ShareDetails[10];
menuChoice();
mySwitch(menuChoice);
}

file://reads all share details from file
public static int loadShareFile(ShareDetail[] shareList) throws IOException
{
try
{
File PortFile = new File("Portfolio.dat");
DataInputStream inStream = new DataInputStream(new
FileInputStream(PortFile));

ShareDetail aShareDetail;
int index = 0;
boolean moreShares = true;

try
{
while(moreShares)
{
aShareDetail = new ShareDetail();
moreShares = aShareDetail.readShare(inStream);
if(moreShares)
shareList[index] = aShareDetail;
index++;
}
}
catch (EOFException e)
{
}
finally
{
inStream.close();
return index;
}
}
catch (FileNotFoundException e)
{
System.out.println("IOERROR: File NOT Found: \n");
}
catch (IOException e)
{
System.out.println("IOERROR: \n" + e.getMessage());
}
finally
{
}

}

file://reads the share details
public boolean readShare(DataInputStream inStream) throws IOException
{
String name = "";
int noOfShares = 0;
int purDate = 0;
double purPrice = 0.0;
double curPrice = 0.0;

name = inStream.readUTF();
noOfShares = inStream.int(); I am also getting an error saying
that an Identifier was expected here??????????????????
purDate = inStream.int();
purPrice = inStream.double();
curPrice = inStream.double();
}

Any help would be appreciated
Narelle