ERROR: nullPointerException

[mathias]

Hi, Please check this

import TerminalIO.KeyboardReader;

public class manyStudents {
	public static void main (String [] args) {
		KeyboardReader 	reader 	= new KeyboardReader();
		Student[] 		student = new Student[500];
		int 			stuNumb = reader.readInt ("Enter the number of students (max is 500): ");
		
		for (int i = 0; i < stuNumb; i++) {
			String stuName = reader.readLine ("Enter the name of sutden #"+ (i+1) +": ");
			student[i].setName(stuName);
			int testNumb = reader.readInt ("Enter the number of tests for "+ student[i].getName() +": ");
		}
	}
}

This code gives me a null pointer exception at line 11...
why? how can i fix it?
Thanks

[hardwired]

Student[] students = new Student[500];
// All elements of this array are null.
for(int j = 0; j < 10; j++)
    System.out.println("students["+j+"] = " + students[j]);
// If the Student class has a no-argument constructor you could
// instantiate them all at once:
for(int j = 0; j < stuNumb; j++)
    students[j] = new Student();
// You could also instantiate a student for each new element as you go:
for (int i = 0; i < stuNumb; i++) {
    String stuName = reader.readLine ("Enter the name of sutden #"+
                                       (i+1) +": ");
    students[i] = new Student();
    // Now we have a non-null array element to work with.
    students[i].setName(stuName);
    int testNumb = reader.readInt ("Enter the number of tests for "+
                                    students[i].getName() +": ");
}