Lire un fichier text en java

File leFichier = new File("nom fichier");
FileInputStream inputStream = new FileInputStream(leFichier);
InputStreamReader isr = new InputStreamReader(inputStream);
BufferedReader in = new BufferedReader(isr);

String s = in.readLine();

while(s!=null)
{
// .... traitement de la ligne ...
s = in.readLine();
}

in.close();
isr.close();
inputStream.close();