Here you can find the source of toLong(Object value)
public static final long toLong(Object value)
//package com.java2s; public class Main { public static final long toLong(Object value) { if (value instanceof Number) return ((Number) value).longValue(); else if (value == null) return 0; else// ww w . j a v a 2 s . c o m return Long.parseLong(value.toString()); } public static final String toString(Object value) { if (value == null) return null; return value.toString(); } }