To convert ruby unpack equivalent in java -

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i'm trying understand line of ruby code:

token.unpack('m0').first.unpack('h*').first

which converting 

r1ykdh//czkubzla09zivzq5/cxinvmokiacnl3mkj0=

to

47560a747fff7192ae6d9940d3d648559439fdcc489ef9a89080029e5dcc289d

as far understand this, base64 hex conversion, when try same thing, not matching converted one.

i need implement same functionality in java.

so i'm going break down. first step token.unpack('m0'). according idiosyncratic ruby unpack('m0') decode base64, built-in base64 libararies base64.decode64(string) function. unpack returns arry here, 1 element, converted base64. use token.unpack('m0').first first (and in case only) element of array returned token.unpack('m0'). if all, you'd correct it's base64. but, unpacked base64 unpacked again, time 'h*', convert characters hex. , finally, because return array, use first again make string.

so in summary, happening first string being decoded base64 string, it's being converted hex.


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