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I have been trying to parse a string from arguments, I have tried

String.parseString(args[0]);

what exactly am I doing wrong?

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    The arguments are already strings. Commented Nov 15, 2012 at 23:11

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args[0] should already be a string if it's coming from command line.

If not, use String.valueOf(args[0]).

See http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html

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Note that if you're trying to validate the arguments and actually get meaning out of them, you can try commons-cli instead of manually running through them.
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As the args argument in the main method is already a String array, you can just use args[0].

There is no such method String.parseString() btw.

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