How Can I Convert Bytes to a Human-Readable Format in Java?

How to Convert Byte Size into Human-Readable Format in Java

Converting byte size into a human-readable format is a common task in software development. In Java, there's no built-in method for this, but we can use Apache Commons Lang3 for a handy way to do it.

Apache Commons Lang3 provides two methods for humanizing byte counts:

• humanReadableByteCountSI: Uses the International System of Units (SI), where 1024 bytes is 1 kilobyte (similar to how 1000 grams is 1 kilogram).
• humanReadableByteCountBin: Uses a binary system, where 1024 bytes is 1 kibibyte (similar to how 1024 bits is 1 kilobit).

Here's how to use these methods:

import org.apache.commons.lang3.StringUtils;

public class ByteSizeConverter {

    public static void main(String[] args) {
        long bytes = 1024 * 1024;

        // Convert to SI format (e.g., 1 MB)
        String humanReadableBytesSI = StringUtils.humanReadableByteCountSI(bytes);
        System.out.println(humanReadableBytesSI); // "1 MB"

        // Convert to binary format (e.g., 1 MiB)
        String humanReadableBytesBin = StringUtils.humanReadableByteCountBin(bytes);
        System.out.println(humanReadableBytesBin); // "1 MiB"
    }
}

These methods provide a convenient way to represent byte sizes in a human-readable format, regardless of whether you prefer SI or binary units.

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