1 import java.io.File;
2 import java.io.FileInputStream;
3 import java.io.FileNotFoundException;
4 import java.io.IOException;
5
6
7 public class Demo4 {
8
9 /**
10 * @param args
11 */
12 public static void main(String[] args) {
13 getFile();
14
15 }
16 public static void getFile() {
17 //找到目标文件
18 File file = new File("C:\\cc\\tt.txt");
19 //建立通道
20 FileInputStream inputStream = null;
21 try {
22 inputStream = new FileInputStream(file);
23 //创建一个缓冲区
24 byte[] b = new byte[1024];
25 try {
26 int count = inputStream.read(b);
27 System.out.println(new String(b, 0, count));
28 } catch (IOException e) {
29 System.out.println("硬盘损坏了，请修理");
30 throw new RuntimeException(e);
31 }
32 } catch (FileNotFoundException e) {
33 System.out.println("文件不存在");
34 //提示用户有错误要修改
35 //让后面的代码停止运行
36 throw new RuntimeException(e); // 创建一个运行时异常
37 } finally {
38 try {
39 inputStream.close();
40 } catch (IOException e) {
41 System.out.println("关闭失败");
42 throw new RuntimeException(e);
43 }
44 }
45 }
46
47
48 }
