How to get 0-padded binary representation of an integer in java?

java binary string-formatting
khachik picture khachik · Dec 12, 2010 · Viewed 134.9k times · Source

for example, for 1, 2, 128, 256 the output can be (16 digits):

0000000000000001
0000000000000010
0000000010000000
0000000100000000

I tried

String.format("%16s", Integer.toBinaryString(1));

it puts spaces for left-padding:

`               1'

How to put 0s for padding. I couldn't find it in Formatter. Is there another way to do it?

P.S. this post describes how to format integers with left 0-padding, but it is not for the binary representation.

Answer

Samuel Parsonage picture Samuel Parsonage · Dec 12, 2010

I think this is a suboptimal solution, but you could do

String.format("%16s", Integer.toBinaryString(1)).replace(' ', '0')

Related questions

Converting an int to a binary string representation in Java?

What would be the best way (ideally, simplest) to convert an int to a binary string representation in Java? For example, say the int is 156. The binary string representation of this would be "10011100".

Read More
How to convert a Binary String to a base 10 integer in Java

I have an array of Strings that represent Binary numbers (without leading zeroes) that I want to convert to their corresponding base 10 numbers. Consider: binary 1011 becomes integer 11 binary 1001 becomes integer 9 binary 11 becomes integer 3 etc. What's the best way to proceed? …

Read More
How to convert a byte to its binary string representation

For example, the bits in a byte B are 10000010, how can I assign the bits to the string str literally, that is, str = "10000010". Edit I read the byte from a binary file, and stored in the byte array B. I …

Read More