gistfile1.pde

import java.text.DecimalFormat;
import java.text.NumberFormat;

    public static String formatBytes(long numBytes)
    {
        NumberFormat formatter = new DecimalFormat("#.00");
        StringBuffer buffer = new StringBuffer();
        if (numBytes > 1024) {
            if (numBytes >= 1073741824D) {
                buffer.append(formatter.format((double) numBytes / 1073741824D)).append("GB");
            } else if (numBytes >= 1048576D) {
                buffer.append(formatter.format((double) numBytes / 1048576D)).append("MB");
            } else {
                buffer.append(formatter.format((double) numBytes / 1024D)).append("kB");
            }
        } else {
            buffer.append(numBytes).append(" bytes"); // Looks better and is more familiar than abbreviation "B"
        }
        return buffer.toString();
    }