What is byte stream? What byte streams are there in Java

In Java, a byte stream is a way of inputting and outputting data, which operates on bytes. Byte streams are mainly used for processing binary data such as images, audio, and video. In this article, we'll explain what byte streams are, what byte streams are in Java, and some sample code.

What is byte stream?

A byte stream is a way of inputting and outputting data, which operates on bytes. In Java, byte streams are mainly used to handle binary data such as images, audio, and video. Byte streams can read and write bytes, while character streams can read and write characters.

Byte streams in Java are commonly used to handle binary data such as images, audio, and video, etc. Since these data are usually stored in bytes, they can be handled more efficiently using byte streams.

Byte streams in Java

There are two types of byte streams in Java: input byte stream and output byte stream. The input byte stream is used to read data from a file or other source, and the output byte stream is used to write data to a file or other destination. The following are some commonly used Java byte streams:

FileInputStream 和 FileOutputStream

FileInputStreamThe and FileOutputStreamclasses are the most basic byte stream classes in Java, and they are used to read and write data from files. Here is a sample code that reads and writes a file using FileInputStreamthe and classes:FileOutputStream

import java.io.*;

public class Example {
    
    
  public static void main(String[] args) {
    
    
    try {
    
    
      FileInputStream input = new FileInputStream("input.txt");
      FileOutputStream output = new FileOutputStream("output.txt");

      int data;
      while ((data = input.read()) != -1) {
    
    
        output.write(data);
      }

      input.close();
      output.close();
    } catch (IOException e) {
    
    
      e.printStackTrace();
    }
  }
}

In the above example, we use FileInputStreamthe class to read input.txtdata from the file and FileOutputStreamthe class to write data to output.txtthe file.

BufferedInputStream 和 BufferedOutputStream

BufferedInputStreamThe and BufferedOutputStreamclasses are buffered byte stream classes in Java that provide the functionality of a buffer to improve reading and writing speed. Here is a sample code that reads and writes a file using BufferedInputStreamthe and classes:BufferedOutputStream

import java.io.*;

public class Example {
    
    
  public static void main(String[] args) {
    
    
    try {
    
    
      FileInputStream input = new FileInputStream("input.txt");
      BufferedInputStream bufferedInput = new BufferedInputStream(input);

      FileOutputStream output = new FileOutputStream("output.txt");
      BufferedOutputStream bufferedOutput = new BufferedOutputStream(output);

      int data;
      while ((data = bufferedInput.read()) != -1) {
    
    
        bufferedOutput.write(data);
      }

      bufferedInput.close();
      bufferedOutput.close();
    } catch (IOException e) {
    
    
      e.printStackTrace();
    }
  }
}

In the above example, we use BufferedInputStreamthe class to read input.txtdata from the file and BufferedOutputStreamthe class to write data to output.txtthe file.

DataInputStream 和 DataOutputStream

DataInputStreamThe and DataOutputStreamclasses are data byte stream classes in Java that can read and write primitive data types and strings. Here is a sample code that reads and writes a file using DataInputStreamthe and classes:DataOutputStream

import java.io.*;

public class Example {
    
    
  public static void main(String[] args) {
    
    
    try {
    
    
      DataInputStream input = new DataInputStream(new FileInputStream("input.txt"));
      DataOutputStream output = new DataOutputStream(new FileOutputStream("output.txt"));

      int intValue = input.readInt();
      double doubleValue = input.readDouble();
      String stringValue = input.readUTF();

      output.writeInt(intValue);
      output.writeDouble(doubleValue);
      output.writeUTF(stringValue);

      input.close();
      output.close();
    } catch (IOException e) {
    
    
      e.printStackTrace();
    }
  }
}

In the example above, we use DataInputStreamthe class input.txtto read integers, doubles, and strings from the file and DataOutputStreamwrite them to output.txtthe file using the class.

Summarize

In this article, we introduced what byte streams are and byte streams in Java. Commonly used byte streams in Java include FileInputStreamand FileOutputStream, BufferedInputStreamand, BufferedOutputStreamand, DataInputStreamand DataOutputStreamso on. These byte stream classes provide different functions and features, and you can choose the appropriate byte stream class to operate according to your needs.

Binary data such as images, audio, and video can be processed more efficiently using byte streams. In practical applications, we usually need to select different byte stream classes to operate according to specific requirements.

In the process of code writing, you need to pay attention to closing the input and output streams in time to avoid problems such as resource leakage and data loss. At the same time, it is also necessary to handle possible exceptions to ensure the stability and reliability of the code.

The above is the introduction and sample code of byte stream in Java, I hope it can be helpful to you.