ByteArrayInputStream reset() method in Java with Examples

The reset() method is a built-in method of the Java.io.ByteArrayInputStream is invoked by mark() method. It repositions the input stream to the marked position.

Syntax: 

public void reset()

Parameters: The function does not accepts any parameter. 
Return Value: The function does not returns anything. 

Below is the implementation of the above function:
Program 1: 

Java

// Java program to implement
// the above function
import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception
    {

        byte[] buf = { 5, 6, 7, 8, 9 };

        // Create new byte array input stream
        ByteArrayInputStream exam
            = new ByteArrayInputStream(buf);

        // print bytes
        System.out.println(exam.read());
        System.out.println(exam.read());
        System.out.println(exam.read());

        // Use of reset() method :
        // repositioning the stream to marked positions.
        exam.reset();

        System.out.println("\nreset() invoked");
        System.out.println(exam.read());
        System.out.println(exam.read());
    }
}

Output:

5
6
7

reset() invoked
5
6

Program 2: 

Java

// Java program to implement
// the above function
import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception
    {

        byte[] buf = { 1, 2, 3, 4 };

        // Create new byte array input stream
        ByteArrayInputStream exam
            = new ByteArrayInputStream(buf);

        // print bytes
        System.out.println(exam.read());
        System.out.println(exam.read());
        System.out.println(exam.read());

        exam.mark(1);

        // Use of reset() method :
        // repositioning the stream to marked positions.
        exam.reset();

        System.out.println("\nreset() invoked");
        System.out.println(exam.read());
        System.out.println(exam.read());
    }
}

Output:

1
2
3

reset() invoked
4
-1

Reference: https://docs.oracle.com/javase/10/docs/api/java/io/ByteArrayInputStream.html#reset()