Number Format Exception while parsing long

Hi All,
I am getting numberformat exception when converting binarystring to Long

Code:

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long test=0;
Long maxValue=Long.MAX_VALUE;
String minValueString=Long.toBinaryString(minValue);
test=Long.parseLong(minValueString,2);// getting exception at this line.

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Any help would be higly appreciated
Regards,
Aamir

what is actually that minValue parameter

Maybe you're trying to convert a non-long