Error(1,1)illegalcharacter '\ufeff' when compiling on android studio

Question

I got an Eclipse project source code(I was told that on Android Studio, maybe they just confused), and I start to migrating the code to android studio refers to

http://developer.android.com/sdk/installing/migrate.html

But it doesn't work. so I import the project from path directly and it transfers to the android-studio project automatically, but still, something wrong when I am compiling.

Error:(1, 1) error: illegalcharacter: '\ufeff'

the error position refers to

package com.bla.blabla;

Please help me, thanks

I'm quite sure that is BOM (byte order mark). Save your file as "UTF-8 without BOM" — Alexey Ten, Apr 22 '14 at 06:06
Find an editor that could save file without BOM. If your file doesn't contains characters beyond ASCII you could save it with notepad as ANSI — Alexey Ten, Apr 22 '14 at 06:20
Looks like a bug of Android Studio http://stackoverflow.com/questions/17151830/android-studio-writing-boms-to-utf-8-file — Alexey Ten, Apr 22 '14 at 06:20
@alexeyten I fix it with Notepad++,appreciate for your advice — Bruce, Apr 22 '14 at 06:36
@Bruce did mine (opening and Saving with encoding then saving with UTF "without" BOM)... I used Sublime to do it... Thanks.... — Marka A, Jan 20 '16 at 03:02

score 39 · Answer 1 · edited Jun 20 '20 at 09:12

39

That's a problem related to BOM (Byte Order Mark) character. Byte Order Mark BOM is a Unicode character used for defining a text file byte order and comes in the start of the file. Eclipse doesn't allow this character at the start of your file, so you must delete it. For this purpose, use a rich text editor, such as Notepad++, and save the file with encoding "UTF-8 without BOM." That should remove the problem.

edited Jun 20 '20 at 09:12

Community

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answered Feb 22 '15 at 22:31

Diamond

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This solved it for me using Sublime Text on my end. Thanks. – Marka A Jan 20 '16 at 03:03
yeah.. It worked. I have copy pasted the same content from a website to a Notepad++, it shows the "LS" with black background. After deleted that I have copy the same content from notepad++ to java, it works fine. – anand krish Mar 15 '16 at 12:05
Solved the problem for me, but please note that converting and copy pasting afterwards did not work. Open the file in your project folder to make this work. – Etsitpab Nioliv Feb 03 '17 at 09:24
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I used XCode to remove illegal character from my file. Now it is fine. Thanks. – Kyaw Min Thu L Feb 14 '17 at 10:29

score 34 · Answer 2 · answered May 12 '15 at 19:28

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Android studio file encoding

On lower-right corner, you can set the file encoding. Select another option than UTF-8

If a popup appear, choose the option Convert.

answered May 12 '15 at 19:28

Marcelo Amorim

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Darshn · Answer 3 · 2015-11-11T06:05:30.790

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As Marcelo told, I changed file Encoding option to UTF-16. Ran it, But didn't work. Again changed to UTF-8 and Converted it. It ran successfully. If above solution doesn't work, try this.

edited Nov 11 '15 at 06:05

answered Nov 11 '15 at 05:50

Darshn

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score 13 · Answer 4 · answered Feb 15 '17 at 11:02

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At bottom right of the project change file encoding UTF-8 to UTF-16.

A new dialog will get open. Select convert it and run it.
It will give you some errors then again change UTF-16 to UTF-8.
Convert it and run the project. This time your project will run successfully.

answered Feb 15 '17 at 11:02

Muhammad Laraib Khan

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it helped me, Thanks – Mahdi Javaheri Jul 10 '17 at 16:43
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Helped me. Thanks! – Solo Aug 18 '17 at 08:29

Ali Yazdanifar · Answer 5 · 2022-07-19T11:58:31.780

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i solved this problem with this method :

ctrl + A in my activity and copy all codes
delete YourClass.java
create YourClass.java
paste all code in new java class

This method worked for me. tnx

edited Jul 19 '22 at 11:58

answered Sep 11 '18 at 08:02

Ali Yazdanifar

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score 3 · Answer 6 · answered Jul 07 '16 at 08:04

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I was facing this error in intelliJ-2016.1.2.

Thank you @Darsh for your help, I did same thing, first changed to UTF-16 (i.e convert into UTF-16) and compiled the code. it didn't work, then again changed back to the UTF-8, this time it worked fine.

Thank you.

answered Jul 07 '16 at 08:04

Sahil Verma

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welcome mate and Welcome to StackOverflow. Please write a comment below solution which i have provided. Do not write as the answer :) Happy coding :) – Darshn Jul 08 '16 at 04:42
Comments and answers are different! – Mohammed Shareef C Sep 13 '17 at 02:16

score 2 · Answer 7 · answered Oct 28 '16 at 19:33

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Above are great solutions. However, if none of them works, try this one:

Open the file in Notepad++; Copy everything; Create a new file with the same name; Paste everything; Save it.

Now it is gone.

answered Oct 28 '16 at 19:33

Kai Wang

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mmmartinnn · Answer 8 · 2016-12-14T17:15:52.100

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I tried several of the other answers here with no joy.

In the end I simply deleted the offending line and rewrote it directly into Android Studio. The error disappeared.

Was this caused by me copying and pasting the line of code from youtube (or whatever random blog I was looking at at the time)?

edited Dec 14 '16 at 17:15

answered Dec 14 '16 at 17:02

mmmartinnn

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Ahmad Aghazadeh · Answer 9 · 2017-10-29T11:51:58.173

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You can try to this method:

Rename the class like class1.java

Create a new class some renamed class like class.java

Select all contain renamed file and copy into the new class.

This method work for me.

edited Oct 29 '17 at 11:51

answered Oct 12 '17 at 07:26

Ahmad Aghazadeh

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Curio · Answer 10 · 2018-01-29T20:59:05.120

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Close android studio and reopen it. It works for me. Furthermore this could happen if you are copying a comment from youtube for example and pasting it into your project

edited Jan 29 '18 at 20:59

answered Jun 07 '17 at 20:00

Curio

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score 1 · Answer 11 · answered Apr 06 '18 at 14:49

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I try using sublime, open the file then "Save with Encoding" there choose UTF-8 (without BOM), and it works :)

answered Apr 06 '18 at 14:49

Bonnie Milian

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score 1 · Answer 12 · answered Mar 04 '19 at 07:18

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Simply go in notepad plus plus and open your file and in encoding option at the top bar just select utf8

answered Mar 04 '19 at 07:18

Keshav Gera · Answer 13 · 2020-04-17T05:50:53.250

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OPEN LOOPView.java File First

Convert Your UTF8 To ISO 8859-1 TO Solve your problem In andorid Studio

If UTf-8 not show in android studio bottom bar then ctl+shift+n open LoopView Class then so Bottom Bar

Note ISO-8859-1 Use this

If your error not resolved then Invalidate cache and Restart again and

gradlew clean npm start -- --reset-cache react-native run-android react-native run-ios

Solve Your issue permenantly

One Other Thing if issue still persist then com.wheel file copy into notepad++ and again copy and paste in your project

 android {  
   compileOptions.encoding = 'ISO-8859-1'
 }

In React-native change in index.js / android/index.js

import PropTypes from 'prop-types';

edited Apr 17 '20 at 05:50

answered Sep 25 '19 at 07:12

Keshav Gera

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If UTf-8 not show in android studio bottom bar then ctl+shift+n open LoopView Class then so Bottom Bar – Keshav Gera Feb 26 '20 at 05:27
if ISO-8859-1' is bot show then please open LoopView file then show it in bottombar – Keshav Gera Apr 17 '20 at 05:51

score 0 · Answer 14 · answered Sep 05 '19 at 16:18

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Just delete the first line of the xml-file and retype it by hand (copy paste would reinsert the hidden BOM).

answered Sep 05 '19 at 16:18

Stefano Mader

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score 0 · Answer 15 · answered Mar 08 '20 at 03:54

The ideas in here certainly helped me but the outcome was a little different.

I did convert my file encoding from UTF-8 to UTF-16. I was then presented with a different error. When i converted it back to UTF-8, I noted that there was a string of unrecognizable characters before my code line. I removed them and recompiled and it worked well.

My conclusion is somehow an unrecognizable character snuck into my code. Could be programmer error, or a blind copy/paste from the web that placed a nasty hidden character. Carrying the process above as outlined by our peers here somehow allowed me to see it.

If you'll follow this idea above, please make sure to clean/rebuild between each conversion.

Error(1,1)illegalcharacter '\ufeff' when compiling on android studio

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