24hrs to 12hrs

import java.text.*;
import java.util.Date;

public class Main {
   public static void main(String [] args) throws Exception {
       
      SimpleDateFormat displayFormat = new SimpleDateFormat("HH:mm");
      SimpleDateFormat parseFormat = new SimpleDateFormat("HH:mm");
      Date date = parseFormat.parse("22:30");
      System.out.println(displayFormat.format(date) + " = " + parseFormat.format(date));

   }
}