BufferedInputStream reset() in Java

reset(): This method is available in java.io.BufferedInputStream class of Java.

Syntax:

void java.io.BufferedInputStream.reset() throws IOException

If mark pos is -1(no mark has been set or the mark has been invalidated), an IOExceptionis thrown. Otherwise, pos is set equal to mark pos.

Parameters: NA

Returns: NA

Throws:

IOException - if this stream has not been marked or, if the mark has been invalidated, or the stream has been closed by invoking its close()method or an I/O error occurs.

Approach

Java

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;

public class BufferedInputStreamreset {
    public static void main(String[] args) throws IOException {

        InputStream inputStream = InputStream.nullInputStream();
        BufferedInputStream bufferedInputStream = 
              new BufferedInputStream(inputStream);

        bufferedInputStream.reset();

        System.out.println(bufferedInputStream);
    }
}

Output:

Exception in thread "main" java.io.IOException: Resetting to invalid mark
	at java.base/java.io.BufferedInputStream.reset(BufferedInputStream.java:446)