Here you can find the source of doubleToLongBits(double value)
public static long doubleToLongBits(double value)
//package com.java2s; //License from project: Open Source License public class Main { public static long doubleToLongBits(double value) { return Double.doubleToLongBits(value); }/*from ww w. ja v a 2 s .c om*/ }