Leer un fichero en Java

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
 
public class CargarFichero {
 
    private static String fichero= "/tmp/fichero.dat";
 
    public CargarFichero() {}
 
    public static void main(String args[]) {
 
        CargarFichero programa = new CargarFichero();
        programa.run();
    }
 
    public int run()  {
        BufferedReader in=null;
        try {
            in = new BufferedReader(new FileReader(fichero));
        } catch (FileNotFoundException ex) {
            ex.printStackTrace();
        }
        String linea = null;
 
        try {
            while ((linea = in.readLine() )!= null){
 
                System.out.println(linea);
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        try {
            in.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
 
        return 0;
 
    }
 
}