Get all object using RandomAccessFile

Question

hi friends,
i have one log file and this log file contain some object. and i am used Serializable Interface.
i know basically object are not readable format, but consider log file(logInfo.log) contain some object like:
12 javasun
20 sunjava
38 java
96 sun
like wise
am using RandomAccessFile class and this my
raf.writeInt(baos.size());
raf.write(baos.toByteArray());
raf.seek(0);
int a = 0;
while(true)
a = raf.readInt();
System.out.println("The pointer Value : " + a);
byte[] b = new byte[a+4];
int x=(int)raf.getFilePointer();
System.out.println("file Pointer : " + x);
raf.read(b,x,a);
ByteArrayInputStream bais = new ByteArrayInputStream(b,x,a);
ObjectInputStream ois = new ObjectInputStream(bais);
Record rec = (Record)ois.readObject(); //here record is object
System.out.println("The object : "+rec.getAttributes());
using this code i got below result
12 javasun
but i can't get all object from the file(logInfo.log)
how can i get all object? help me!!!...
Thank You

Answer 1

ok, sir
i tried and i got all object from the file. Thank
you,
and,
if i need last two object from file(logInfo.log)
like
38 java
96 sun
how can i get? please give some clue or code
Thank youSince you don't have a set size for the objects, then you will have to read through the entire file always keeping the last two objects, and as soon as the read fails return them.
As I said in your first thread, however, you would be much better off writing the objects with a set size (i.e. calling ByteArrayOutputStream(size) with a single max size rather than ByteArrayOutputStream( ) ) as you would then be able to use seek adding 4 (for the int) to size and multiplying by the position of the recordset you want to read (0 for the first). You would then, also be able to overwrite records and the such (which is the usually one of the main reasons for using something like RandomAccessFile, i.e. creating a Flat DB-Like File).
Edit:
And you would probably lose the int, then anyway (when using a set size), as it wouldn't be needed.