java.lang.RuntimeException: Spurious serialisation error

I had problem with my client program when I run my client in eclipse or netbeans, I get a 开发者_开发百科runtime error java.lang.RuntimeException: Spurious serialisation error. But when i use command prompt I have no errors.

Here is my client code

http://pastebin.com/jUkw7F7k

Looks like you are writing an Integer (through autoboxing) to the serial file and attempting to read two objects casting them to BigInteger. (But see my comment on the question.)