Untitled

import java.util.*;
import java.io.*;

public class CheckFile<E extends Comparable<? super E>>{
	
	SortedList<Integer> list = new SortedList<Integer>();
	SortedList<Integer> noDuplicates = new SortedList<Integer>(false);
	/* A list which doesn't allow for duplicates... Easier to check how many different elements there is  */
	/* This could of course be done with a counter, but it complicates the flow of the program somewhat, and it's only O(1)... */

	public CheckFile() {
		checkTheFile();
	}
	
	public void checkTheFile() {
		/* Get the file... */
		BufferedReader in = null;
		try {
			in = new BufferedReader(new FileReader("fil.txt"));
		} catch (FileNotFoundException e){
			System.out.println("Error opening the file");
			return;
		}
		
		/* Parse the file */
		try {
			String oneLine = in.readLine();
			while(oneLine != null) {
				StringTokenizer str = new StringTokenizer(oneLine);
				while(str.hasMoreTokens()) {
					try {
						int i = Integer.parseInt(str.nextToken());
						list.insert(i);			// Normal list, the one we're going to use
						noDuplicates.insert(i);	
					} catch (NumberFormatException e) {
						System.out.println("Error parsing contents of file");
						return;
					}
				}
				oneLine = in.readLine();
			}
		} catch (IOException e) { /* Boom */ }
		
		/* Standard print outs... */
		System.out.println("Det fanns " + noDuplicates.size() + " olika tal i filen.");
		System.out.println("Nedan anges talen samt antal förekomster inom parantes");
		System.out.println();
				
		/* Go through the list, on each element, check how many other exact same elements there is... */
		/* Of course, remember to remove the element... */
		/* Do always it atleast once for each element... */
		Iterator it = list.iterator();
		while(it.hasNext()) {
			int inc = 0;										// Our incrementor...
			Object talet = it.next();							// Element
			
			do {
				inc++;
				it.remove();
			} while(it.hasNext() && it.next().equals(talet));
			
			System.out.println(talet + " (" + inc + ')'); 		// Printing...
			it = list.iterator();								// Restore pointer...
		}
	}
	
	
	public static void main(String[] args) {
		new CheckFile<Integer>();
	}
	
}