Trying to not Omit Leading 0's when writing from Int to Hex using buffered writer

Question

I create buffered writer

BufferedWriter errorReport = new BufferedWriter(new FileWriter("ErrorReport.txt"));

Then I wanted to write while converting my integer to a hex.

  errorReport.write(Integer.toHexString(version))

This works perfectly, except it omits leading 0's as it writes the minimum possible length. Say 'version' is a byte in length and simply prints 6. Well I know the actual value is actually 06. How do I keep these leading 0's?

I tried errorReport.write(String.format("%03x", Integer.toHexString(version)), but get an error for illegalFormatConversionException x != java.lang.String

Reimeus · Accepted Answer · 2013-08-26T17:02:18.413

1

The x specifies hexadecimal so format will perform the conversion by passing the integer directly

errorReport.write(String.format("%03x", version));

edited Aug 26 '13 at 17:02

answered Aug 26 '13 at 16:42

Reimeus

158,255
15
216
276

0 - to pad with zeros and 3 - to set width to 3 and 'x' for hexadecimal [refer](http://stackoverflow.com/a/275715/1897935) – Srinath Ganesh Aug 26 '13 at 16:46
Beautiful. Yup. I was like I was converting it twice. Thanks – john stamos Aug 26 '13 at 18:07

score 1 · Answer 2 · answered Aug 26 '13 at 16:43

1

You're very close. The JVM is complaining that you are trying to hex-format a string. Try errorReport.write(String.format("%03x", version))

answered Aug 26 '13 at 16:43

lreeder

12,047
2
56
65

Beautiful. Yup. I was like I was converting it twice. Thanks – john stamos Aug 26 '13 at 18:07

Trying to not Omit Leading 0's when writing from Int to Hex using buffered writer

2 Answers2