Ubuntu script to compile multiple java files?

Question

I understand the command would be javac file_name.java but how would I put together a shell script which could compile several java files?

I was also thinking about copying the files, which I presume I just use cp and absolute file path referencing.

The usual way is to use a build tool like make or ant.

Mechanical snail
– Mechanical snail

2012-08-18 21:16:52 +00:00
Commented Aug 18, 2012 at 21:16 — Mechanical snail
– Mechanical snail, Commented Aug 18, 2012 at 21:16
Why do not you use maven? (maven.apache.org)

Alexandre Dupriez
– Alexandre Dupriez

2012-08-18 21:41:41 +00:00
Commented Aug 18, 2012 at 21:41 — Alexandre Dupriez
– Alexandre Dupriez, Commented Aug 18, 2012 at 21:41

Akhi · Accepted Answer · 2012-08-18 21:17:30Z

1

Create a .sh file and add the following contents. Make the file as executable and run it. (Specify the complete path along with the file name)

#! /bin/sh
javac sample.java

answered Aug 18, 2012 at 21:17

Akhi

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4 Comments

Ignacio Vazquez-Abrams Over a year ago

This will recompile every script each time called, which is less than efficient.

peroni_santo Over a year ago

If I wanted to copy my java file into the location where javac is located, how do I make sure each time I copy my java file it overwrites the previous version? Is there an argument for the cp command?

Akhi Over a year ago

cp will overwrite if file exists. And Why do you want to copy the file to your javac location. just add the java/bin to your environment and you can use javac anywhere.

peroni_santo Over a year ago

@AkhilDev I am a bit of a newbie to Unix, can you please explain how I do this? Thanks

TOC · Accepted Answer · 2012-08-19 02:48:51Z

0

Try this script: compile_java_files.sh

#!/bin/sh

typeset -r JAVA_FILES_DIR=$(cd full_path_to_java_files 2>/dev/null ; pwd)   # JAVA FILES DIRECTORY

LOG_DIR="/tmp/java_compilation/logs"    # Create this dir or use another one

for java_file in `ls $JAVA_FILES_DIR`;
do
    javac $java_file
    return_status=`echo $?`
    if [ $return_status -ne 0 ]
    then
        echo "Failed to compile $java_file" >> $LOG_DIR/$java_file.ERR

        exit 1
    fi
done

Then run your script(don't forget to specify the path to the directory that contain java files):

chmod +x compile_java_files.sh
./compile_java_files.sh

edited Aug 19, 2012 at 2:48

answered Aug 18, 2012 at 23:50

TOC

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