long lminsec=system.currentTimeMillis();
java.util.Random randfactor=new java.util.Random(lminsec);
double result=1.0+3.0*randfactor.nextDouble();
java.util.Random randfactor=new java.util.Random(lminsec);
double result=1.0+3.0*randfactor.nextDouble();
float result=1+2*randfactor.nextFloat();