Java, do variables associated with an object persist? BigInteger Example -

i'm having bit of trying figure if variables used when creating object persist in java.

specifically i'm looking @ biginteger. if i'm reading code correctly looks instead of doing addition etc. on bit bit basis number broken 32bit words allows faster operation. have not been able figure out whether 32bit word representation , other variables (mag[], signum etc.) have created everytime method used on biginteger or if somehow persists in cache , remain associated particular biginteger once has been created.

i guess you're looking @ code:

 1054    public biginteger add(biginteger val) {  1055         int[] resultmag;  1056         if (val.signum == 0)  1057             return this;  1058         if (signum == 0)  1059             return val;  1060         if (val.signum == signum)  1061             return new biginteger(add(mag, val.mag), signum);  1062   1063         int cmp = intarraycmp(mag, val.mag);  1064         if (cmp==0)  1065             return zero;  1066         resultmag = (cmp>0 ? subtract(mag, val.mag)  1067                            : subtract(val.mag, mag));  1068         resultmag = trustedstripleadingzeroints(resultmag);  1069   1070         return new biginteger(resultmag, cmp*signum);  1071     } 

the mag , signum refer fields in each instance of biginteger. not calculated on demand, part of implementation of biginteger. method of access (not function invocation) indicates it's merely accessing storage location.