java读写txt文件

import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.FileWriter;public class TxtFile { public void read() { FileReader fr = null;BufferedReader br = null;try { fr = new FileReader("F://a.txt");br = new BufferedReader(fr);String line = br.readLine();while (line != null) { System.out.println(line);line = br.readLine();} } catch (Exception e) { System.out.println(e);} finally { try { if (br != null) br.close();if (fr != null) fr.close();收起