Read serialized objects : cannot read past first object : StreamCorrupted

Question

I have written multiple instances of an object to a file. When I try to read them back, the first one works but the second gets a StreamCorruptedException: Type code out of range, is -84.
Several Forum topics deal with this, but I have found no relevant replies.
Thanks for any help.
Here is the code:
public void abFileWrite(AbRec abRec) throws IOException
FileOutputStream fileStream = new FileOutputStream(abDFileName,true);
ObjectOutputStream writer = new ObjectOutputStream(fileStream);
try
writer.writeObject((AbRec) abRec);
writer.flush();
fileStream.close();
writer.close();
catch (IOException ioe)
System.out.println("abFile cannot write to file "+
directory+abFileName+". "+"ex="+ioe);
public void readAll()
try{      // just TRY to read that second record!
FileInputStream file = new FileInputStream(abDFileName);
ObjectInputStream in = new ObjectInputStream(file);
AbRec ar = (AbRec) in.readObject();
System.out.println("1 ar="+ ar.getAb());
ar = (AbRec) in.readObject(); //StreamCorruptedException: Type code out of range, is -84
System.out.println("2 ar="+ ar.getAb());
in.close();
catch (Throwable th) { System.out.println("readAll th="+th);  }
public class AbRec implements java.io.Serializable
String ab;
public AbRec(){}
public void setAb (String a){ab = a;}
public String getAb(){return (ab);}
}

Answer 1

The answer, thanks to Bass345, is:
4 bytes of header info is stored each time.
So, call skip on the FileInputStream.
fileInputStreamName.skip((long)4);
Note it is the FileInputStream, not the ObjectInputStream.