How to direct compile-error message to a txt file?

[Nancy Zhang]

This is a question about command line usage rather than Java code.

I'm trying to direct compile-error message to a txt file using this command: javac *.java >result.txt. But it seems only messages delivered by Java statement System.out.XXX could be put into target txt file. For error messages delivered by System.err.XXX, it could only be displayed on the screen, and cannot be put into txt file.

Is there a command or argument I could use to direct compile time err msg into a txt file?

Thanks.

[Paul Sturrock]

System.out.XXX & System.err.XXX will only output something when your program is running, not when it is compiling.

[fred rosenberger]

i think it's going to depend on the OS, but on Windos, i think you can do

javac *.java 2 > result.txt

what i THINK i'm remembering is that the 2 means the stderror messages. so you could do

javac *.java > result.txt 2 > erorr.txt

to separate error messages from the 'everything is ok' messages. but don't hold me to this... it's been a while since i've had to do that...

[Nancy Zhang]

Great thanks, fred rosenberger, it works! The only thing needs attention is that there is no whitespace between 2 and >, otherwise, java command argument error.
Thanks again!

[fred rosenberger]

ah... sorry about that. but i'm glad you figured it out!!!

[Jim Yingst]

If you want to direct everything to one file rather than two, this should work on both Unix and Windows:

javac *.java 1>result.txt 2>&1

[Nancy Zhang]

Yeah! this one is cool! will use it. Thanks.