[SOLVED] Deserialization question

[xcallmejudasx]

I have some simple code I've been playing with to fix my understanding of serialization and I've managed to be able to serialize and deserialize multiple objects to/from a text file but the issue I'm having is trying to deserialize the objects within the file without having to first re-write them. I know the problem is my loop is using a variable from SerializableObject that gets reset to 0 each time I run the program but I can't figure a way to deserialize every object unless I know this number.

public class SerializableObject implements Serializable{

	private static final long serialVersionUID = 1654834268554L;
	static File file = new File("testSerialize.txt");
	static FileOutputStream fos;
	static ObjectOutputStream oos;
	private String name;
	private int age;
	static int count = 0;
	
	static{
		try {	fos = new FileOutputStream(file);
		} catch (FileNotFoundException e) {	System.out.println("File not found exception");		}
		
		try {	oos = new ObjectOutputStream(fos);
		} catch (IOException e) {	System.out.println("object stream error");	}
	}
	
	public SerializableObject(String n, int a){
		this.name = n;
		this.age = a;
		count++;
		try {
			oos.writeObject(this);
			System.out.println("Object written");
		} catch (IOException e) {
			System.out.println("Error writing object");
		}
	}

//taken from my SerializeDriver class

	private static void readObjects() {
		SerializableObject obj1 = null;

		
		try {	
			fis = new FileInputStream(file);
			System.out.println("fis");
		} catch (FileNotFoundException e) {	System.out.println("Error extracting file");	}
		
		try {		
			ois = new ObjectInputStream(fis);
			System.out.println("ois");
		} catch (IOException e) {		System.out.println("InputStream error");	}
		
		
		try {
			for(int x = 1; x <= SerializableObject.count; x++){
				obj1 = (SerializableObject)ois.readObject();
				System.out.println(obj1.getName());
			}	
		} catch (EOFException e) {	System.out.println("Reached end of file");  
		} catch (IOException e) {		e.printStackTrace();
		} catch (ClassNotFoundException e) {	e.printStackTrace();
		}		
	}

now everything works fine and dandy when I uncomment a call to defaultCreateObjects but I get nothing when all I run is the above readObjects method.

[markw8500]

I did some research and after you write your first object, you have to append the output file...

Check out this thread:
Serialization - How to Serialize multiple objects ?

[xcallmejudasx]

Such a simple fix. I tried doing this earlier but was was trying to append File not FileOutputStream (I blame it on being Monday).

It's now working how I intended it to work 3 months ago when I set this project aside. Now to just move it from the practice code into the actual project and to clean up the explosion of try/catch blocks that's going on.

Thanks for finding that for me. I never had much luck on the sun forums sadly :(

[markw8500]

No Prob...