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Java ByteArrayInputStream close() Method with Example

ByteArrayInputStream Class close() method: Here, we are going to learn about the close() method of ByteArrayInputStream Class with its syntax and example.
Submitted by Preeti Jain, on March 02, 2020

ByteArrayInputStream Class close() method

• close() method is available in java.util package.
• close() method is used to close this ByteArrayInputStream and free system resources linked with the stream.
• close() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• close() method may throw an exception at the time of the closing stream.
  IOException: This exception may throw while performing input/output operations.

Syntax:

    public void close();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is void, it returns nothing.

Example:

// Java program to demonstrate the example 
// of void close() method of
// ByteArrayInputStream

import java.io.*;

public class CloseBAIS {
    public static void main(String[] args) throws Exception {
        byte[] by = {
            97,
            98,
            98,
            99
        };

        // Instantiates ByteArrayInputStream 
        ByteArrayInputStream byte_s = new ByteArrayInputStream(by);

        // Close the stream and free
        // system resources linked with 
        // this stream byte_s
        byte_s.close();

        // By using available() method is to
        // return the no. of bytes to be left 
        // for reading
        Integer n_byte = byte_s.available();
        System.out.println("Left avail bytes = " + n_byte);

        // we can perform available() on
        // byte_s because still this stream is 
        // already closed
        char ch = (char) byte_s.read();
        System.out.println("ch: " + ch);
    }
}

Output

Left avail bytes = 4
ch: a