JAVA_异常

 1         FileInputStream in = null;
 2         
 3     try {
 4         in = new FileInputStream("myfile.txt");
 5         int b;
 6         b = in.read();
 7         while (b != -1) {
 8             System.out.print((char) b);
 9             b = in.read();
10         }
11     } catch (IOException e) {
12       System.out.println(e.getMessage());
13          
14     } catch (FileNotFoundException e) {
15         e.printStackTrace(); 
16       
17     } finally {
18         try {
19           in.close();
20       } catch (IOException e) {
21           e.printStackTrace();
22       }
23     }