下面的代碼是讀取文本文件的例子，程序會讀取text.txt文件，並將它的內容顯示出來。
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.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());
