Reads a float from the stream message. 
 a float value from the stream message 
| Exception Type | Condition | 
|---|---|
| MessageException | if JMS fails to read the message due to some internal error. | 
| MessageEOFException | if unexpected end of message stream has been reached. | 
| MessageFormatException | if this type conversion is invalid. | 
| MessageNotReadableException | if the message is in write-only mode. | 
IStreamMessage Interface | WebLogic.Messaging Namespace