在使用in.readObject()时出现如下错误：java.io.OptionalDataException

[quartz]

在使用in.readObject()时出现如下错误：java.io.OptionalDataException

msdn中有如下帮助，但是我不理解其中的primitive data的意思，请帮我解释一下，谢谢！

Unexpected data appeared in an ObjectInputStream trying to read an Object. This exception occurs when the stream contains primitive data instead of the object expected by readObject. The eof flag in the exception is true to indicate that no more primitive data is available. The count field contains the number of bytes available to read.

[violetrose]

当你用readObject方法去读取一个java基本类型（如:int,long,float,boolean等，java中除了基本类型（int，long..）和对象（Integer,Long,...），没有其他数据类型）时抛出的异常。