$JavaDoubleMINVALUEString="0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004940656458412465441765687928682213723650598026143247644255856825006755072702087518652998363616359923797965646954457177309266567103559397963987747960107818781263007131903114045278458171678489821036887186360569987307230500063874091535649843873124733972731696151400317153853980741262385655911710266585566867681870395603106249319452715914924553293054565444011274801297099995419319894090804165633245247571478690147267801593552386115501348035264934720193790268107107491703332226844753335720832431936092382893458368060106011506169809753078342277318329247904982524730776375927247874656084778203734469699533647017972677717585125660551199131504891101451037862738167250955837389733598993664809941164205702637090279242767544565229087538682506419718265533447265625";

$JavaDoubleMINVALUE=2^-1074;

ToExpression[$JavaDoubleMINVALUEString]===N[$JavaDoubleMINVALUE,StringLength[$JavaDoubleMINVALUEString]]

RealDigits[$JavaDoubleMINVALUE,10,StringLength[$JavaDoubleMINVALUEString]]

FromDigits/@Characters[$JavaDoubleMINVALUEString][[326;;]]===RealDigits[$JavaDoubleMINVALUE,10,StringLength[$JavaDoubleMINVALUEString]][[1]]