Java 6 exec, escaping special characters within ProcessBuilder.command(String[])

Hello,

I use the commandline from my main java app to execute another 'mailer.jar' app.
One of the argument is the mail content that can contains any character including \n, \r, ", '...

I thought using

ProcessBuilder.command(String[])

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instead of  

ProcessBuilder.command(String)

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would prevent the ProcessBuilder.exec from having troubles with splitting the command line, but it does not work.

If my command is a String[] array containing:

String[] cmd=new String[]{"java",
"-jar",
"mailer.jar"
"smtp.test.org",
"test@test.org",
"test@test.org",
"my subject ...",
"my content with carriage returns and other strange characters"};

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I will obtain as the String[] args of the main method of my mailer.jar

String[] args=new String[]{
"smtp.test.org",
"test@test.org",
"test@test.org",
"my subject ...",
"my content with",
"carriage returns and",
"other strange characters",
...};

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What should I do?
I would prefer not to use Apache Commons Exec because we have developped our own low level lib to handle multi threading and asynchronous exec...

Thanks for your help!

Regards,

Renaud