java.lang.Double.longValue() java.lang.Double.longBitsToDouble() java.lang.Double.parseDouble() java.lang.Double.longValue() package com.codingdict; import java.lang.*; public class DoubleDemo { public static void main(String[] args) { /* returns the double value represented by this object converted to type long */ Double obj = new Double("543267.90"); long l = obj.longValue(); System.out.println("Value = " + l); obj = new Double("30.0"); l = obj.longValue(); System.out.println("Value = " + l); } } java.lang.Double.longBitsToDouble() java.lang.Double.parseDouble()