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

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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.)