How to Read and Write Binary Files in Java?

The Binary files contain data in a format that is not human-readable. To make them suitable for storing complex data structures efficiently, in Java, we can read from the write to binary files using the I nput and Output Streams .

In this article, we will learn and see the code implementation to read and write binary files in Java.

Syntax to Read from a Binary File:

InputStream inputStream = new FileInputStream("data.bin");
int data;
while ((data = inputStream.read()) != -1)
// Process the read data
>
inputStream.close();

Syntax to Write to a Binary File:

OutputStream outputStream = new FileOutputStream("data.bin");
// Write data to the output stream
outputStream.close();

Program to Read and Write Binary Files in Java

Below is the implementation of Read and Write Binary Files in Java:

Java

// Java Program to Read and Write Binary Files import java.io.*; // Drver Class public class GFG < // Main Function public static void main(String[] args) // Writing to binary file OutputStream Stream = new FileOutputStream( "data.bin" ); Stream.write( new byte []< 0x48 , 0x65 , 0x6C , 0x6C , 0x6F >); // ASCII values for "Hello" Stream.close(); // Reading from a binary file InputStream inputStream = new FileInputStream( "data.bin" ); while ((data = inputStream.read()) != - 1 ) < System.out.print(( char ) data); // Convert byte to character inputStream.close(); > catch (IOException e) < e.printStackTrace(); Output 
Hello

Explanation of the above Program:

Writing to a Binary File:

Reading from a Binary File:

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