How do I execute an external program from Java?

Question

Possible duplicates:

• How should I call a Perl Script in Java?
• Include Perl in Java
• How can I call Perl from Java?

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I want to execute a program of Perl from Java.

I take a file name with an argument and carry out a program, and the program of Perl outputs a result file.

So it is the program side of the JAVA

1. I appoint an argument and carry out Perl program
2. Perl program reads the file which I spitted out

2) checks the existence of the file and seems to be able to do it, but will 1) be possible? ActivePerl is installed with the present machine. I develop Java on Eclipse.

Answer 1

Use:

String command = "ls";    
Runtime.getRuntime().exec(command);

Reference:Executing a Command

FYI: The link contains examples of commands with arguments, and with spaces too.

Answer 2

This article explains it rather well.