FilterInputStream mark(int) in Java

mark(int): This method is available in the java.io.FilterInputStream class of Java.

Syntax:

void java.io.FilterInputStream.mark(int readlimit)

This method takes one argument. This method marks the current position in this input stream.

A subsequent call to the reset method repositions this stream at the last marked position so that subsequent reads re-read the same bytes.

The read limit argument tells this input stream to allow that many bytes to be read before the mark position gets invalidated.

Parameters: One parameter is required for this method.

readlimit: the maximum limit of bytes that can be read before the mark position becomes invalid.

Returns: NA

Exceptions: NA

Approach

Java

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FilterInputStream;
import java.io.IOException;

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

        File data = new File("D:\\hello.txt");
        FileInputStream file = new FileInputStream(data);

        FilterInputStream filter = 
                  new BufferedInputStream(file);

        int readlimit = 1;
        System.out.println("Mark the limit");
        filter.mark(readlimit);
        filter.close();
    }
}

Output:

Mark the limit

Other methods of FilterInputStream

available(): This method returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking the next caller of a method for this input stream.

close(): This method closes this input stream and releases any system resources associated with the stream.

markSupported(): This method tests if this input stream supports the mark and reset methods.

read(): This method reads the next byte of data from this input stream.

read(byte[]): This method reads up to b.length bytes of data from this input stream into an array of bytes.

read(byte[], int, int): This method reads up to len bytes of data from this input stream into an array of bytes.

reset(): This method repositions this stream to the position at the time the mark method was last called on this input stream.

skip(long): This method skips over and discards n bytes of data from the input stream.