Data and Time format in Java - beginner level

import java.io.*;
import java.util.*;
import java.text.*;

class  Main{
	public static void main(String[]p){
		SimpleDateFormat formatter = new SimpleDateFormat ("yyyy.MM.dd H:mm");
		Date now = new Date();
		System.out.println(formatter.format(now));

		formatter.applyPattern("dd MMM yyyy");
		System.out.println(formatter.format(now));
	}
}