How to work on 2 open text files in one main program

Question

I write to one text file and then I close it. I then open another text file in the same "main" class but I cannot write to this file - I get the following error: "Exception in thread "main" java.util.NoSuchElementException".
Here's the code with the line underlined, at which point the error above gets reported:
import java.io.*;
import java.util.*;
public class TwoFileStudentMarks
public static void main(String[] args) throws IOException
PrintWriter stFile = new PrintWriter (new FileWriter ("stFil.txt"));
Scanner kbd = new Scanner(System.in);
int lineNum = 0;
System.out.println("Type in a name: (ZZZ to stop)");
String name = kbd.nextLine();
while (!name.equalsIgnoreCase("ZZZ"))
stFile.println(name);
lineNum++;
System.out.print("Input next name: (ZZZ to stop)");
name = kbd.nextLine();
stFile.close();
kbd.close();
PrintWriter tstFile = new PrintWriter (new FileWriter ("tstFil.txt"));
kbd = new Scanner(System.in);
for (int j=0; j<lineNum; j++)
for (int i=0; i<3; i++)
System.out.print("For student " + j + " enter test " + i + ": ");
int tst = kbd.nextInt();
tstFile.print(tst+" ");
tstFile.println();
tstFile.close();
kbd.close();
} // end main     
} // end class

Answer 1

Thank You for responding to my question. I am new to the forum. I have posted only ONE question since joining on Novemebr 5th, 2007. So I have a question. What are tags  and how does one include them in a question that one wishes to post to the forum?
Secondly, my experience of Java is only about 10 months. So any advice, tips, replies are greatly appreciated and most welcome, so that I may continue to use this language.