Lire un fichier txt

package code;

import java.io.InputStreamReader;
import java.io.FileInputStream;
import java.io.BufferedReader;


		public class LireBench {
			@SuppressWarnings("unused")
			private LineFile11  lineFile11 = new LineFile11 ();

		
		    public static void main(String[] args){
		        try {
		            String            ligne;
	
		            InputStreamReader fichier = new InputStreamReader(new FileInputStream("D:/costmatrix.txt")); 

		            BufferedReader    tampon  = new BufferedReader(fichier);

	            	int nombre = 0;

		            while((ligne = tampon.readLine()) != null) {
		            	
		            	
		                System.out.println(ligne);
		                
		                ++nombre;

		            }
		            System.out.println(nombre);
		            
		          

		            tampon.close(); 
		        } catch (Exception e) {
		            System.out.println(e.toString());
		            
		    
		        }	}
		    		}