I dont understand what they want me to do

Download the class Time.java
-Create a new class called Concert.java based on the class diagram below

Concert

_________________

-name: String

-startTime:Time

-endTime:Time

_____________________

+<<constructor>> Concert (n:String,start: Time, end:Time)

+toString():String

Create a class called ConcertApp.java .
- This class includes the main method.
-Inside the main method create an instance of Concert. Initialize it with values of your choice.
-Print the newly created concert

public class Time
{
   private int hours;
   private int minutes;
   private int seconds;

   public Time(int h, int m, int s)
   {
       setTime(h, m, s);
   }

   public Time()
   {
   }

   public void setHours(int h)
   {
       hours = ((h >= 0 && h < 24) ? h : 0);
   }

   public void setMinutes(int m)
   {
       minutes = ((m >= 0 && m < 60) ? m : 0);
   }

   public void setSeconds(int s)
   {
       seconds = ((s >= 0 && s < 60) ? s : 0);
   }

   public void setTime(int h, int m, int s)
   {
       setHours(h);
       setMinutes(m);
       setSeconds(s);
   }

   public String toMilitary()
   {
       return String.format("%02d:%02d:%02d", hours, minutes, seconds);
   }

   @Override
   public String toString()
   {
       return String.format("%d:%02d:%02d %s",
               (hours == 0 || hours == 12) ? 12 : hours % 12, minutes,
               seconds, (hours < 12) ? "AM" : "PM");
   }

}