Error appending objects to file

Question

Here is the source code i'm using
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
public class SerialiseTest {
     public static void main(String[] args) {
          TestObject o1 = new TestObject(1);
          try {
               ObjectOutputStream oout = new ObjectOutputStream(
                         new FileOutputStream("output.dat",true));
               oout.writeObject(o1);
               oout.flush();
               oout.close();
               ObjectInputStream oin = new ObjectInputStream(
                         new FileInputStream("output.dat"));
while(true){
               Object ob1 = oin.readObject();
               System.out.println(ob1);
          } catch (Exception exc){
               exc.printStackTrace();
class TestObject implements Serializable {
     private int foo;
     public TestObject(int i) {
          foo = i;
     public String toString() {
          return "TestObject::"+foo;
here is the exception
java.io.StreamCorruptedException: invalid type code: AC
                    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1356)
                    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
                    at SerialiseTest.main(SerialiseTest.java:26)

Answer 1

Do something else. You didn't say what your requirements were or why you were trying to do that, so you can't expect much of an answer.