Java tutorial
//package com.java2s; public class Main { public static long HowLongAgo(String timestamp) { Long tempo; try { tempo = Long.parseLong(timestamp); } catch (Exception e) { e.printStackTrace(); return 0; } java.util.Date Now = new java.util.Date(); long diff = (Now.getTime() - tempo); if (diff < 0) return 0; diff /= 1000; return diff; } }