I need someone to review my program and tell me why it won't work

Question

I can't get this to work. It's a program that generates a set of random numbers, stores them as a .txt file then a second program imports that data and sorts it in descending order and displays the average and median of the data. If this is too messy and there is a better way to post these programs please tell me and I will repost. Sorry about the messyness but here you go:
It's two separate .java files.
RandMarks.java:
import java.io.*;
public class RandMarks
public static void main (String [] args) throws IOException
int randomNum;
PrintWriter fileOut = new PrintWriter (new FileWriter ("marks.txt"));
for (int i = 1; i <= 25; i++)
randomNum = (int) (Math.random () * 60 + 40);
fileOut.println (randomNum);
fileOut.close ();
IcsMarkbook.java:
import java.io.*;
public class IcsMarkbook
public static void main (String [] args) throws IOException
BufferedReader readFile = new BufferedReader (new FileReader ("marks.txt"));
int inMarks [] = new int [25];
int avgMark, medMark;
int totalMarks = 0;
for (int i = 0; i < 100; i++)
inMarks = Integer.parseInt (readFile.readLine ());
bubbleSort (inMarks);
for (int p = 0; p < inMarks.length; p++)
System.out.println ("#" + p + " - " + inMarks [p]);
totalMarks = totalMarks + inMarks [p];
avgMark = totalMarks / inMarks.length;
System.out.println ("The average is " + avgMark);
medMark = inMarks [13]
public static void bubbleSort (int array [])
for (int pass = 0; pass < array.length - 1; pass++)
for (int element = 0; element < array.length - 1; element++)
if (array [element] > array [element + 1])
swap (array, element, element + 1);
//Swap method
public static void swap (int array2 [], int first, int second)
int hold;
hold = array2 [first];
array2 [first] = array2 [second];
array2 [second] = hold;

Answer 1

RandMarks.java:
import java.io.*;
public class RandMarks
     public static void main (String [] args) throws IOException
          int randomNum;
          PrintWriter fileOut = new PrintWriter (new FileWriter ("marks.txt"));
          for (int i = 1; i <= 25; i++)
               randomNum = (int) (Math.random () * 60 + 40);
               fileOut.println (randomNum);
          fileOut.close ();
}IcsMarkbook.java:
import java.io.*;
public class IcsMarkbook
     public static void main (String [] args) throws IOException
          BufferedReader readFile = new BufferedReader (new FileReader ("marks.txt"));
          int inMarks [] = new int [25];
          int avgMark, medMark;
          int totalMarks = 0;
          for (int i = 0; i < 100; i++)
               inMarks = Integer.parseInt (readFile.readLine ());
          bubbleSort (inMarks);
          for (int p = 0; p < inMarks.length; p++)
               System.out.println ("#" + p + " - " + inMarks [p]);
               totalMarks = totalMarks + inMarks [p];
          avgMark = totalMarks / inMarks.length;
          System.out.println ("The average is " + avgMark);
          medMark = inMarks [13]
     public static void bubbleSort (int array [])
          for (int pass = 0; pass < array.length - 1; pass++)
               for (int element = 0; element < array.length - 1; element++)
                    if (array [element] > array [element + 1])
                         swap (array, element, element + 1);
     //Swap method
     public static void swap (int array2 [], int first, int second)
          int hold;
          hold = array2 [first];
          array2 [first] = array2 [second];
          array2 [second] = hold;
}The message that I got was:
Exception in thread "main" jaja.lang.NumberFormatException: null
        at java.lang.Integer.parseInt(Integer.java:415)
        at java.lang.Integer.parseInt(Integer.java:497)
        at IcsMarkbook.main(IcsMarkbook.java:13)
I have gone over the program multiple times and cannot figure out what's wrong.