I'm writing objects in a link list to file and when I write more thatn a certain number I get a StackOverflowError. My list has Item objects which have long part numbers, two doubles, a string, and an int. here's the code that is failing;

try {
			FileOutputStream fos = new FileOutputStream(file1);
			BufferedOutputStream bos = 
				new BufferedOutputStream(fos);
			ObjectOutputStream oos = 
				new ObjectOutputStream(bos);
			oos.writeObject(itemInventory);
			oos.close();
			
		} catch (Exception e) {
			e.printStackTrace();
		}

This is the error i get;

Exception in thread "main" java.lang.StackOverflowError
at java.lang.Double.doubleToLongBits(Double.java:774)
at java.io.Bits.putDouble(Bits.java:119)
at java.io.ObjectStreamClass$FieldReflector.getPrimFieldValues(ObjectStreamClass.java:1919)
at java.io.ObjectStreamClass.getPrimFieldValues(ObjectStreamClass.java:1184)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1494)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)

....
and it repeats at this point.

First of all if you look at the API of the classes: ObjectOutputStream, ObjectInputStream, you will find examples on how to save and read objects. Use those.

Also what type is the itemInventory and does it implement the java.io.Serializable interface?