مشكله في برنامج يقوم بتحويل الوقت الوقت حسب دول العالم

public class BetterTime extends Time
{


public BetterTime(String militaryTime)
{




public void setZone(String zone)

public void Update(int minutes)

public class ZoneTime extends BetterTime
{

private int;


public ZoneTime(String militaryTime)



public void setZone(String zone)



public String toString()
{
String am_pm;
String zero = "";
if (afternoon)
am_pm = "PM";
else
am_pm = "AM";
if (minutes < 10)
zero = "0";

return hours + ":" + zero + minutes + " " + am_pm;
}

}

//Represents time in hours and minutes using
//the customary conventions

public class Time
{
//hours in conventional time
private int hours;
//minutes in conventional time
private int minutes;
//true if afternoon time, false if morning time
private boolean afternoon;

//Constructs a cutomary time (12 hours, am or pm)
//from a military time ##:##
public Time(String militaryTime)
{
//Check to make sure something was entered
if (militaryTime == null)
{
System.out.println(
"You must enter a valid miliary time." );
}
//Check to make sure there are 5 characters
else if (//CONDITION TO CHECK LENGTH OF STRING)
{
System.out.println(militaryTime +
" is not a valid miliary time." );
}
else
{
//Check to make sure the colon is in
//the correct spot
if (//CONDITION TO CHECK COLON POSITION)
{
System.out.println(militaryTime +
" is not a valid miliary time." );
}
//Check to make sure all other characters are digits
else if (//CONDITION TO CHECK FOR DIGIT)
{
System.out.println(militaryTime +
" is not a valid miliary time." );
}
else if (//CONDITION TO CHECK FOR DIGIT)
{
System.out.println(militaryTime +
" is not a valid miliary time." );
}
else if (//CONDITION TO CHECK FOR DIGIT)
{
System.out.println(militaryTime +
" is not a valid miliary time." );
}
else if (//CONDITION TO CHECK FOR DIGIT)
{
System.out.println(militaryTime +
" is not a valid miliary time." );
}
else
{
//SEPARATE THE STRING INTO THE HOURS
//AND THE MINUTES, CONVERTING THEM TO
//INTEGERS AND STORING INTO THE
//INSTANCE VARIABLES

//validate hours and minutes are valid values
if(hours > 23)
{
System.out.println(militaryTime +
" is not a valid miliary time." );
}
else if(minutes > 59)
{
System.out.println(militaryTime +
" is not a valid miliary time." );
}
//convert military time to conventional time
//for afternoon times
else if (hours > 12)
{
hours = hours - 12;
afternoon = true;
System.out.println(this.toString());
}
//account for midnight
else if (hours == 0 && minutes == 0)
{
hours = 12;
System.out.println(this.toString());
}
//morning times don't need converting
else
{
System.out.println(this.toString());
}
}
}
}







public void setHours(int hours)
public void setMinutes(int minutes)
public void setAfternoon(boolean afternoon)



public int getHours()
{
return hourse;
}
public int getMinutes()
{
return minutes;
}
public boolean getAfternoon()
{
return afternoon;
}


public String toString()
{
String am_pm;
String zero = "";
if (afternoon)
am_pm = "PM";
else
am_pm = "AM";
if (minutes < 10)
zero = "0";

return hours + ":" + zero + minutes + " " + am_pm;
}
}

import java.util.Scanner;

public class TimeDemo
{
public static void main (String [] args)
{
Scanner keyboard = new Scanner(System.in);
char answer = 'Y';
String enteredTime;
String response;

while (//CHECK ANSWER AFTER CONVERTING TO CAPITAL)
{
System.out.print(
"Enter a miitary time using the ##:## form ");
enteredTime = keyboard.nextLine();
Time now = new Time (enteredTime);
System.out.println(
"Do you want to enter another (Y/N)? ");
response = keyboard.nextLine();
answer = response.charAt(0);
}

}
}