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What is BufferedInputStream in Java?

What is BufferedInputStream in Java?

A BufferedInputStream adds functionality to another input stream-namely, the ability to buffer the input and to support the mark and reset methods. When the BufferedInputStream is created, an internal buffer array is created.

How do I get bytes from BufferedInputStream?

read(byte[] b, int off, int len) method reads len bytes from byte-input stream into a byte array, starting at a given offset. This method repeatedly invokes the read() method of the underlying stream.

How do you link the InputStream object with the BufferedInputStream?

Let’s see the simple example to read data of file using BufferedInputStream:

  1. package com. javatpoint;
  2. import *;
  3. public class BufferedInputStreamExample{
  4. public static void main(String args[]){
  5. try{
  6. FileInputStream fin=new FileInputStream(“D:\\testout.
  7. BufferedInputStream bin=new BufferedInputStream(fin);
  8. int i;

How do I read BufferedInputStream?

  1. read() method of BufferedInputStream class in Java is used to read the next byte of data from the input stream.
  2. read(byte[ ] b, int off, int len) method of BufferedInputStream class in Java is used to read bytes from the byte-input stream into the specified byte array which starts at the offset given by user.

How do I create a BufferedInputStream?

Create a BufferedInputStream BufferedInputStream package first. Once we import the package here is how we can create the input stream. // Creates a FileInputStream FileInputStream file = new FileInputStream(String path); // Creates a BufferedInputStream BufferedInputStream buffer = new BufferInputStream(file);

What is BufferedInputStream and BufferedOutputStream in java?

BufferedInputStream and BufferedOutputStream use an internal array of byte, also known as buffer, to store data while reading and writing, respectively. Buffered streams are typically more efficient than similar non-buffered streams.

What is the difference between InputStream and BufferedInputStream?

InputStream is an abstract class with a read() method intended to read one byte at a time from a file. BufferedInputStream is not abstract, so you can actually create an instance. Its read() method still returns one byte at a time but it reads ahead internally to fill a buffer.

Why is BufferedInputStream faster?

With a BufferedInputStream , the method delegates to an overloaded read() method that reads 8192 amount of bytes and buffers them until they are needed. It still returns only the single byte (but keeps the others in reserve). This way the BufferedInputStream makes less native calls to the OS to read from the file.

What is the difference between BufferedInputStream and FileInputStream?

A BufferedInputStream reads from another InputStream , but a FileInputStream reads from a file1.

What is the purpose of BufferedInputStream and BufferedOutputStream classes?

The BufferedInputStream class uses a buffer to store the data. This stream provides the better performance on OutputStream. It extends the FileOutputStream class.

What is InputStream reader in Java?

An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified charset . The charset that it uses may be specified by name or may be given explicitly, or the platform’s default charset may be accepted.

What is the optimal size of buffer in BufferedInputStream?

It is best to use buffer sizes that are multiples of 1024 bytes.

What is the difference between FileInputStream and BufferedInputStream?

A FileInputStream obtains input bytes from a file in a file system. And does not supports mark and reset methods. BufferedInputStream is much faster as compared to FileInputStream. FileInputStream is slower as compared to BufferedInputStream.

Should I use FileReader or FileInputStream?

So starting of with FileReader class in java is used to read data from the file. It returns data in byte format like FileInputStream class….Java.

FileInputStream FileReader
FileInputStream is used for reading binary files. FileReader is used for reading text files in platform default encoding.

Why is BufferedOutputStream more efficient than FileOutputStream?

A larger buffer results in more speed up to a point, typically somewhere around the size of the caches within the hardware and operating system. As you can see, reading bytes individually is always slow. Batching the reads into chunks is easily the way to go.

How do you read write a text file in Java?

There are several ways to read a plain text file in Java e.g. you can use FileReader, BufferedReader, or Scanner to read a text file….Methods:

  1. Using BufferedReader class.
  2. Using Scanner class.
  3. Using File Reader class.
  4. Reading the whole file in a List.
  5. Read a text file as String.

How do you use an InputStream reader?


  1. public class InputStreamReaderExample {
  2. public static void main(String[] args) {
  3. try {
  4. InputStream stream = new FileInputStream(“file.txt”);
  5. Reader reader = new InputStreamReader(stream);
  6. int data =;
  7. while (data != -1) {
  8. System.out.print((char) data);

Why FileInputStream is used in Java?

FileInputStream class is useful to read data from a file in the form of sequence of bytes. FileInputStream is meant for reading streams of raw bytes such as image data. For reading streams of characters, consider using FileReader.

What is BufferedInputStream and BufferedOutputStream?

How read and write data from a file in Java?

How to Read and Write Text File in Java

  1. Reader, InputStreamReader, FileReader and BufferedReader.
  2. Writer, OutputStreamWriter, FileWriter and BufferedWriter.
  3. Character Encoding and Charset.
  4. Java Reading from Text File Example.
  5. Java Writing to Text File Example.

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