java instantiation time

public class Main{
public static void main(String[] args){
Date date = new Date();
String strDateFormat = “yyyy-MM-dd HH:mm:ss”;
SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat);
String time = sdf.format(date);
System.out.println(time);
}
}
输入结果:2021-01-12 21:47:23