Byte stream classes in Java with examples

The byte stream or binary classes in Java are used to read and write data in the form of bytes to files like images, videos, etc. The byte stream abstract base classes are InputStream and OutputStream. The input byte stream class hierarchy is shown in the below figure.

The description of these input byte stream classes is provided in the below table:

Following program reads characters from a file using the byte stream classes: InputStream and FileInputStream:

import java.io.*;
class InputStreamDemo
{
	public static void main(String [] args) throws Exception
	{
		InputStream is = new FileInputStream("data.txt");
		int ch;
		while((ch = is.read()) != -1)
		{
			System.out.print((char)ch);
		}
		is.close();
	}
}

Output for the above program is:

Startertutorials

The output byte stream class hierarchy is shown in the below figure.

The description of these output byte stream classes is provided in the below table:

Following program writes characters to a file using the byte stream classes: OutputStream and FileOutputStream:

import java.io.*;
class OutputStreamDemo
{
	public static void main(String [] args) throws Exception
	{
		OutputStream os = new FileOutputStream("data.txt");
		byte data[] = {115,116,117,116,115};
		os.write(data);
		os.flush();
		os.close();
	}
}

Output for the above program is:

Stuts

For more information, visit the following links:

• Java IO Tutorial

Suryateja Pericherla

Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.

He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.

He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.