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Hexadecimal floating-point literals

Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 15081

I've been programming in Java for more than 10 years, so I thought I knew the language inside out, but I just discovered a new, obscure feature: you can write floating-point constants in hexadecimal.

You can for example write: 0x50.1p3 which is equal to 640.5.

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Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46337
I never knew that, but it's in the Java™ Language Specification that you can use p/P as an exponent indicator.
David Newton

Joined: Sep 29, 2008
Posts: 12617

Yeah, I never actually understood this one... I suppose some day it could come in handy?
I agree. Here's the link:
subject: Hexadecimal floating-point literals
It's not a secret anymore!