Bit oriented

Return	Method	Summary
static long	doubleToLongBits(double value)	Returns a IEEE 754 floating-point "double format" bit layout.
static long	doubleToRawLongBits(double value)	Returns a IEEE 754 floating-point "double format" bit layout, preserving Not-a-Number (NaN) values.
static double	longBitsToDouble(long bits)	Returns the double value corresponding to a given bit representation.


public class Main {
  public static void main(String[] args) {
    
    System.out.println(Double.doubleToLongBits(1.2));

  }
}

The output:


4608083138725491507

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