How do I find out which version of Java I am using Perl?

Question

How do I find out which version of Java I am using Perl programming and using that execute some jar file based on that?

Answer 1

"java -version" will show you the version you are using.

"perl -v" will show you the version of Perl you are using.

Answer 2

in a perl script,

@args = ("java", "-version");
system(@args) == 0
    or die "system @args failed: $?"

or rather simply,

system("java -version");

Answer 3

You can capture the Java version from a Perl script using backticks.

$version = `java -version`;

Also see: How can I capture STDERR from an external command? for more alternatives than you can shake a stick at.

Answer 4

Use the System command...

system("java -version");

If you are going to export a new Java

system('export PATH=/usr/java1.6/bin:$PATH');