java.lang.Double.doubleToLongBits()

package com.codingdict;



import java.lang.*;



public class DoubleDemo {



   public static void main(String[] args) {



      Double d = new Double("15.30");



      //returns the bits that represent the floating-point number

      System.out.println("Value = " + d.doubleToLongBits(5.5d));  

   }

}