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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

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Using Perl to compile Java

Posted by enquirer (enquirer), 1 March 2004
I am trying to write a simple perl script to compile my java code but I am having some few problem. This is what I have in my perl code. The perl  file is call compile.


javac  @ARGV[0] ;

I call it as below;


My small java program does not compile. any idea?


Posted by admin (Graham Ellis), 1 March 2004
Ah - I think you're a Shell programmer converting to Perl - you'll need too backquote the compile command as the way it's written, you've got it looking for as Perl function called javac.

Here's a completed (but minimal) piece of code to compile and run a Java program from Perl:


print `javac $ARGV[0]`;
($basename) = ($ARGV[0] =~ /(.*)\./);
print `java $basename`;

Note the need to print out the results (backquotes return the result rather than sending it to stdout).  The regular expresion match is to strip off the .java from the end of the java command so that what you run would be


which would call up

java Hello

Question - have you looked at the Ant build tool - it's become pretty much a Java standard for specifiying build procedures and dependencies - a sort of OS independent version of make

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