How to Generate Zero-Padded Binary Representations of Integers in Java?

Padding Binary Representations of Integers in Java

Question:

How can one obtain zero-padded binary representations of integers in the Java programming language? For instance, given the integers 1, 2, 128, and 256, the desired output should be as follows (with 16 digits):

0000000000000001
0000000000000010
0000000010000000
0000000100000000

The following attempt using String.format() pads the left side with spaces instead of zeros:

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

Output:

               1

Answer:

While not the most ideal solution, a workaround is to utilize the following code:

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

By replacing any spaces with zeros, this code produces the desired zero-padded binary representation.

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