Double value = new Long(Long.MAX_VALUE).doubleValue();
value += Double.MIN_VALUE;
if (value < -(new Long(Long.MAX_VALUE).doubleValue()) || value > new Long(Long.MAX_VALUE).doubleValue()) {
  // Expecting code here to execute, but it doesn't.
}

9.223372036854776E18
= 9223372036854776000

9223372036854775807

9223372036854776000 (value)
9223372036854775807 (Long.MAX_VALUE)

double d = Long.MAX_VALUE;
BigDecimal bd= new BigDecimal(d);
System.out.println(bd);

double d = Long.MAX_VALUE;
// get the next represented value.
double d1 = Double.longBitsToDouble(Double.doubleToLongBits(d)+1);
System.out.println(d > Long.MAX_VALUE);
System.out.println(d1 > Long.MAX_VALUE);

false
true