InputStream mark(int) in Java

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

Syntax:

void java.io.InputStream.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 readlimit arguments tell 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.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

public class InputStreammark {
    public static void main(String[] args) throws IOException {
        File file = new File("D:\\hello.txt");
        InputStream inputStream = new FileInputStream(file);

        int readlimit = 10;
        inputStream.mark(readlimit);
        System.out.println("Successfully mark the read limit");
        inputStream.close();
    }
}

Output:

Successfully mark the read limit

Some other methods of InputStream

available(): This method returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking, which may be 0, or 0 when the end of the stream is detected.

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.

InputStream.nullInputStream(): This method returns a new InputStream that reads no bytes. The returned stream is initially open.

read(): This method reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255.

read(byte[]): This method reads some number of bytes from the input stream and stores them into the buffer array b.

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

readAllBytes(): This method reads all remaining bytes from the input stream.

readNBytes(int): This method reads up to a specified number of bytes from the input stream.

readNBytes(byte[], int, int): This method reads the requested number of bytes from the input stream into the given byte array.

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 this input stream.

skipNBytes(long): This method skips over and discards exactly n bytes of data from this input stream.

transferTo(OutputStream): This method reads all bytes from this input stream and writes the bytes to the given output stream in the order that they are read.