下面的代码是读取文本文件的例子， 顺序会读取text. txt文件， 并将它的内容显示出来。
1 import java. io. BufferedReader;
2 import java. io. File;
3 import java. io. FileReader;
4 import java. io. FileNotFoundException;
5 import java. io. IOException;
6
7 public class ReadTextFileExample
8 {
9 public static void main(String[] args)
10 {
11 File file = new File("test. txt");
12 StringBuffer contents = new StringBuffer();
13 BufferedReader reader = null;
14
15 try
16 {
17 reader = new BufferedReader(new FileReader(file));
18 String text = null;
19
20 // repeat until all lines is read
21 while ((text = reader. readLine()) != null)
22 {
23 contents. append(text)
24 . append(System. getProperty(
25 "line. separator"));
26 }
27 } catch (FileNotFoundException e)
28 {
29 e.
程海湖 printStackTrace();
30 } catch (IOException e)
31 {
32 e. printStackTrace();
33 } finally
34 {
35 try
36 {
37 if (reader != null)
38 {
39 reader. close();
40 }
41 } catch (IOException e)
42 {
43 e. printStackTrace();
44 }
45 }
46
47 // show file contents here
48 System. out. println(contents. toString());
