Java Date SimpleDateFormat

24 -hour time display :

public class Datetime { 
 
    public static void main(String args[]){ 
         java.util.Date current=new java.util.Date(); 
           java.text.SimpleDateFormat sdf=new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
           String c=sdf.format(current); 
           System.out.println(c); 
    } 
}

12 -hour time display :

public class Datetime { 
 
    public static void main(String args[]){ 
         java.util.Date current=new java.util.Date(); 
           java.text.SimpleDateFormat sdf=new java.text.SimpleDateFormat("yyyy-MM-dd hh:mm:ss");  
           String c=sdf.format(current); 
           System.out.println(c); 
    } 
}

difference between the two : yyyy-MM-dd HH: mm: ss; yyyy-MM-dd hh: mm: ss