jenkins groovy scripting (timestamps)

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import hudson.Util;

currentTime = new Date().getTime()/1000 as Integer

Date date = new Date(currentTime * 1000L);
DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS Z");
String formatted = format.format(date);

println(formatted)

//def jenkinsTimeMillis = System.currentTimeMillis()
def jenkinsTimeMillis = (new Date().getTime()) + 3600000
//println(jenkinsTimeMillis)

Date date2 = new Date(jenkinsTimeMillis);
DateFormat format2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS Z");
String formatted2 = format2.format(date2);

println(formatted2)