Two Class Program but No Output or Error

[H0AX]

Am writing this program using two classes for my school project from last 4 days. I have completed this program I think but when am running this program, it shows no error also it doesn't show any logic or runtime error..just got blank screen after compiling. Am wondering that why its not printing anything..trying from last 8-9 hrs but no luck. I bet that I missed something silly and cant figure that out. So if any one can help me then I greatly appreciate. Thank You

public class Student   
{

private String name; //Name of Student
private int matricNo; //Student Number
private int yearOfBirth; //Students DOB
private int age; //Students Age
private double fees; //Fees for the each course
private int numberOfCoursesRegistered; //number of courses that students wants to register
private String[ ] subjectName; 
private boolean registered= false;

public Student(String NAME, int MATRIC, int B_YEAR)
{ 

name= NAME;
yearOfBirth=B_YEAR; 
matricNo= MATRIC; 
numberOfCoursesRegistered=0;
subjectName= new String[3];

calculateAge();

}

private void calculateAge()
{

int currentYear=2010;
age= currentYear-yearOfBirth;

}//calculateAge


public void calculateFee()
{ 

if (registered==true) 

fees=numberOfCoursesRegistered*300; 

}//calculateFee

public void registerSubject (String subject1)
{

if (registered==false) 
{
    
subjectName[0]=subject1;    
numberOfCoursesRegistered=1;
registered=true;

}   

else

  System.out.println("You already registered");


}// registerSubject


public void registerSubject (String subject1, String subject2)
{

if (registered==false) 
{
    
  subjectName[0]=subject1;
  subjectName[1]=subject2; 
  numberOfCoursesRegistered=2; 
  registered=true; 
}

else    

  System.out.println("You already registered");  

}// registerSubject 

public   void   registerSubject   (String   subject1,   String   subject2,   String subject3)
{

if (registered==false) 
{

subjectName[0]=subject1; 
subjectName[1]=subject2; 
subjectName[3]=subject3; 
numberOfCoursesRegistered=3; 
registered=true; 

} 

else

  System.out.println("You already registered"); 
}

// registerSubject 

public void displaylnfo ( ) 
{ 

  if (registered==true)
  { 

System.out.println("Name: " + name); 
System.out.println("Matric: " + matricNo); 
System.out.println("Year of Birth: " + yearOfBirth); 
System.out.println("age " +age); 
System.out.println("Fees: " + fees);

System.out.println("No of courses registered:+numberOfCoursesRegistered"); 

System.out.println("Courses registered are:"); 

for (int count=0; count < numberOfCoursesRegistered; count++) 

System.out.println(subjectName[count]); 

  } //if 

else 

  System.out.println("Information cannot be displayed because you have not registered");

} //displayInfo 

}//class

This is another main class

public class FinalStudent
{

	public static void main(String[]args)
	{

		Student John = new Student ("John Smith" , 2345 , 1969);

		John.registerSubject("Java Programming");
		John.calculateFee();
	}

}

[gcalvin]

Well, two things I see:

public void displaylnfo ( )

1. Did you mean to call this method displayInfo() (the comment at the end of the method suggests that you did)?

2. Did you mean to call that method at some point?

-Gary-

[H0AX]

O my god ..i cant believe i left that...thanks gcalvin..its working fine right now :D thanks for ur help