Converting a Hex String into 32 Bit Binary String

Question

How can I convert a Hex String into 32bit Binary String? I did

String binAddr = Integer.toBinaryString(Integer.parseInt(hexAddr, 16));

To get the Binary String, but I need to pad it with 0's to ensure its 32 bits, how can I do that, preferably with Formatter?

possible duplicate of (Java) Specify number of bits (length) when converting binary number to string? — user180100
– user180100, Commented Nov 20, 2011 at 9:02

Jonathan Schneider · Accepted Answer · 2011-11-20 09:02:18Z

0

String binAddr = Integer.toBinaryString(Integer.parseInt(hexAddr, 16)); 
String.format("%032", new BigInteger(binAddr));

The idea here is to parse the string back in as a decimal number temporarily (one that just so happens to consist of all 1's and 0's) and then use String.format().

Note that you basically have to use BigInteger, because binary strings quickly overflow Integer and Long resulting in NumberFormatExceptions if you try to use Integer.fromString() or Long.fromString().

answered Nov 20, 2011 at 9:02

Jonathan Schneider

27.9k13 gold badges79 silver badges101 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Converting a Hex String into 32 Bit Binary String

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related