Java - Write code to convert date String to some time ago Format

Requirements

Write code to convert date String to some time ago Format
Demo

//package com.book2s;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

public class Main {
    public static void main(String[] argv) {
        String time = "book2s.com";
        System.out.println(dateString2GoodExperienceFormat(time));
    }/*from www .  ja  v a2s. c o  m*/

    public static String dateString2GoodExperienceFormat(String time) {
        if (isNullString(time)) {
            return "";
        } else {
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat(
                    "yyyy-MM-dd HH:mm:ss");
            simpleDateFormat.setTimeZone(TimeZone.getTimeZone("GMT+08"));
            try {
                String timeString;
                Date parse = simpleDateFormat.parse(time);
                long distanceTime = new Date().getTime() - parse.getTime();
                if (distanceTime < 0L) {
                    timeString = "0 mins ago";
                } else {
                    long n2 = distanceTime / 60000L;
                    new SimpleDateFormat("HH:mm");
                    SimpleDateFormat simpleDateFormat2 = new SimpleDateFormat(
                            "MM-dd");
                    if (n2 < 60L) {
                        timeString = String.valueOf(n2) + " mins ago";
                    } else if (n2 < 720L) {
                        timeString = String.valueOf(n2 / 60L)
                                + " hours ago";
                    } else {
                        timeString = simpleDateFormat2.format(parse);
                    }
                }
                return timeString;
            } catch (Exception ex) {
                ex.printStackTrace();
                return "";
            }
        }
    }

    public static boolean isNullString(String s) {
        return s == null || s.equals("") || s.equals("null");
    }
}