Leitura e Escrita em arquivos

package gomes.fernando.robson;

import java.io.IOException;

public class Principal {

    public static void main(String args[]) throws IOException {

        String path = "/tmp/file.txt";

        ManipuladorArquivo.escritor(path);

        ManipuladorArquivo.leitor(path);

    }

}

package gomes.fernando.robson;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.util.Scanner;

public class ManipuladorArquivo {

    public static void leitor(String path) throws IOException {

        BufferedReader buffRead = new BufferedReader(new FileReader(path));

        String linha = "";

        while (true) {

            if (linha != null) {

                System.out.println(linha);

            } else

                break;

            linha = buffRead.readLine();

        }

        buffRead.close();

    }

    public static void escritor(String path) throws IOException {

        BufferedWriter buffWrite = new BufferedWriter(new FileWriter(path));

        String linha = "";

        Scanner in = new Scanner(System.in);

        System.out.println("Escreva algo: ");

        linha = in.nextLine();

        buffWrite.append(linha + "\n");

        buffWrite.close();

    }

}