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=2008;
age= currentYear-yearOfBirth;

}//calculateAge

public void calculateFee()
{ 

if (registered==true) 

fees=numberOfCoursesRegistered*350; 

}//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 class

public class FinalStudent
{

public static void main(String[]args){

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

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

}

Edited 6 Years Ago by H0AX4: n/a

You aren't getting any output becuase you haven't asked for any! You call new Student and calculateFee but neither of these produces any output (unless there is an error). You have a displaylnfo method - it would be a good idea to call that!

This article has been dead for over six months. Start a new discussion instead.