Puzzle 42 – Solution.

Nan is a special number having a unique property that one Nan is not equal to another Nan. In java a floating point variable can be assigned Nan as a value.

So, someType = float & someValue = Float.Nan or 0.0f/0.0f, gives you the desired result!

class Equals {
  public static void main(String args[]){
      float  x = Float.NaN;
      System.out.println(x == x)    //This prints false!!
    }
}