Java 三种时间戳

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class Test01 {
	
	public static void main(String args[]){
		Date date=new Date();
		SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmss");
		System.out.println("时间戳Date="+date.getTime());
		Calendar cal=Calendar.getInstance();
		System.out.println("时间戳Calendar="+cal.getTimeInMillis());
		System.out.println("时间戳System="+System.currentTimeMillis());
		
		
	}

}