BufferedInputStream

 1 package file;
 2 
 3 import java.io.BufferedInputStream;
 4 import java.io.File;
 5 import java.io.FileInputStream;
 6 import java.io.IOException;
 7 
 8 public class Demo3 {
 9     public static void main(String[] args) throws IOException {
10         readTest();
11     }
12     
13     //BufferedInputStream维护的是一个字节数组，8192
14     //凡是缓冲流，都不具备读写文件的能力
15     public static void readTest() throws IOException {
16         File file = new File("F:\\2.txt");
17         FileInputStream fileInputStream = new FileInputStream(file);
18         //建立缓冲输入字节流
19         //因为BufferedInputStream不具备读写文件的能力，要借助FileInputStream
20         BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
21         
22         //读取文件数据
23         int content = 0;
24         while((content = bufferedInputStream.read()) != -1) {
25             System.out.println((char)content);
26         }
27         
28         //关闭资源
29         bufferedInputStream.close();    //实际上关闭的FileInputStream的close
30     }
31 }