import java.nio.ByteBuffer;

public class BufferMarkDemo{

public static void main(String[] args){

ByteBuffer buffer = ByteBuffer.allocate(7);

buffer.put((byte)10).put((byte)20).put((byte)30).put((byte)40); // current position will be 4.

buffer.limit(4);

// mark the buffer at specified position

buffer.position(1).mark().position(3); // current position will be 3.

while(buffer.hasRemaining()){

System.out.println("element at the position " + buffer.position() + " : " + buffer.get());

}

System.out.println();

// reset the buffer, in other words setting the position to be the mark.

buffer.reset();

while(buffer.hasRemaining()){

System.out.println("element at the position " + buffer.position() + " : " + buffer.get());

}

}

}