Class float

In a project that I'm working there is an inputText to input float number and to save it into database,
But I had a problem. The inputText was binded into an instance of Class Float in Java language, but when I input some number such as 1234567892 and submit it, it converted into 123456792 into database, and when I read it, it shows 1.23456792E8.
How does it happen? Is there any method to solve this problem to save and show this number as itself(123456789 or 1.23456789E8)?
Thanks

Convert the String to BigDecimal and save that instead.
Floating-point types are not adequate for saving decimal numbers with fraction.
Float's precision of only the first 7 positions explains what happened.