1. Overview

2. Read File using BufferedInputStream Example

package com.javaguides.javaio.fileoperations.examples;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
/**
 * This Java program demonstrates how to read file in Java using BufferedInputStream.
 * @author javaguides.net
 */
public class BufferedInputStreamExample {
	public static void main(String[] args) {
		try( FileInputStream fin=new FileInputStream("D:\\testout.txt"); 
			 BufferedInputStream bin=new BufferedInputStream(fin); ){
			int i; 
		 while((i=bin.read())!=-1){ 
		 System.out.print((char)i); 
		 } 
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

3. Reference