Initialization with string in scientific format in Java BigInteger? -

i have need work large numbers (something in range 1e100 - 1e200). however, biginteger class, seems suitable in general, not recognize strings in scientific format during initialization, not support conversion string in format.

bigdecimal d = new bigdecimal("1e10"); //works biginteger i1 = new biginteger("10000000000"); //works biginteger i2 = new biginteger("1e10"); //throws numberformatexception system.out.println(d.toengineeringstring()); //works system.out.println(i1.toengineeringstring()); //method undefined 

is there way around? cannot imagine such class designed assumption users must type hundreds of zeros in input.

scientific notation applies bigintegers in limited scope - i.e. when number in front of e has many or fewer digits after decimal point value of exponent. in other situations information lost.

java provides way work around letting bigdecimal parse scientific notation you, , converting value biginteger using tobiginteger method:

biginteger i2 = new bigdecimal("1e10").tobiginteger(); 

conversion scientific notation can done constructing bigdecimal using constructor takes biginteger:

system.out.println(new bigdecimal(i2).toengineeringstring());