BufferedReader读取文本文件

1. import java.io.BufferedReader;
2. import java.io.FileNotFoundException;
3. import java.io.FileReader;
4. import java.io.IOException;
6. public class T {
7.     public static void main(String[] args) {
8.         String fileName = "data.txt";
9.         BufferedReader fromFile = null;
10.         try {
11.             FileReader fr = new FileReader(fileName);
12.             fromFile = new BufferedReader(fr);
13.             System.out.println("The file " + fileName+ " contains the following lines:");
14.             String line = fromFile.readLine();
15.             while (line != null) {
16.                 System.out.println(line);
17.                 line = fromFile.readLine(); // throw IOException
18.             } 
19.         } catch (FileNotFoundException e) {
20.             System.out.println("Error opening the file " + fileName);
21.             System.exit(0);
22.         } catch (IOException e) {
23.             System.out.println("Error reading the file " + fileName);
24.         } 
25.         finally {
26.             try {
27.                 if (fromFile != null)
28.                     fromFile.close(); // throw IOException
29.             } catch (IOException e) {
30.                 System.out.println("Error closing the file " + fileName);
31.                 System.exit(0);
32.             }
33.         }
34.     }
35. }