BufferedInputStream

 

package file;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class Demo3 {
    public static void main(String[] args) throws IOException {
        readTest();
    }
    
    //BufferedInputStream维护的是一个字节数组，8192
    //凡是缓冲流，都不具备读写文件的能力
    public static void readTest() throws IOException {
        File file = new File("F:\\2.txt");
        FileInputStream fileInputStream = new FileInputStream(file);
        //建立缓冲输入字节流
        //因为BufferedInputStream不具备读写文件的能力，要借助FileInputStream
        BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
        
        //读取文件数据
        int content = 0;
        while((content = bufferedInputStream.read()) != -1) {
            System.out.println((char)content);
        }
        
        //关闭资源
        bufferedInputStream.close();    //实际上关闭的FileInputStream的close
    }
}