Iterrate through an array of files

Question

I am having trouble with the following program, making to iterate through an array of three files, that
are placed in a directory below the program directory. What I would like my program to do is to read 10 lines of each of the files in the subdirectory and then go back and read another 10 lines from the each files(remembering which file is which) and so on till all the files are read. The number of the files in the subdirectory can change, therefore nothing should be hardcoded!
Here is the program so far:
public class thekernel {
public void thekernel() {}
public void executeKernel() throws Exception {
boolean read = false;
String input_line = null;
int quantum = 10;
int programCounter = 0;
String dirname = "processdir";
File f1 = new File(dirname);
if (f1.isDirectory()){
String s[] = f1.list();
for(int i = 0; i < s.length; i++) {
System.out.println (s);
while ( i < s.length ) {
RandomAccessFile fr =
new RandomAccessFile (("processdir/")+s[i], "r");
while (((input_line=fr.readLine()) != null) &&
( programCounter < quantum )){
System.out.println (input_line);
programCounter++;
i++;
programCounter = 0;
public static void main(String args[]) throws Exception {
thekernel K = new thekernel();
K.executeKernel();
here is the output it produces at the moment:
Process_1.txt
1FORK 1F1
FORK 2
WAIT 4
WAIT 2
FORK 5
FORK 6
ABCD 7
FORK 8
FORK 9
ABCD 10
2FORK 1F2
FORK 2
ABCD 3
WAIT 4
FORK 5
FORK 6
ABCD 7
FORK 8
FORK 9
ABCD 10
3FORK 1F3
FORK 2
ABCD 3
WAIT 1
FORK 5
FORK 6
ABCD 7
FORK 8
FORK 9
ABCD 10
Any help much appreciated.........................

Answer 1

You should create an collection of rafs, one for each file, then when you switch between files, the location will be intact.You still need to logic to determine when all of the files have been read. One idea could be to use a vector to hold the rafs, and remove each one as the the eof is reached. When the vector is empty, then all of the files will have been read.
Something like:
public void executeKernel() throws Exception {
    final int QUANTUM = 10;
    String dirname = "processdir";
    File f1 = new File(dirname);
    if (f1.isDirectory()){
        String s[] = f1.list();
    class Foo {
        public String name;
        public RandomAccessFile file;
        public Foo(String name, RandomAccessFile file) {
            this.name = name;
            this.file = file;
    Vector files = new Vector()
    for(int x = 0; x < s.length; x++)
        files.add(new Foo(s[x], new RandomAccessFile (("processdir/")+s[x], "r"))));
    String input_line = null;
    int programCounter = 0;
    while(files.size() > 0) {
        for(int i = 0; i < files.size(); i++) {
            System.out.println ( ((Foo)files.elementAt(i)).name );
            programCounter = 0;
            while (programCounter < quantum ) {
                if( (input_line = ((Foo)files.elementAt(i)).file.readLine()) != null) {
                    System.out.println (input_line);
                    programCounter++;
                else {
                    files.removeElementAt(i);
                    programCounter = quantum;