The mark() method of java.nio.ShortBuffer Class is used to mark the current position of this ShortBuffer as the mark of this buffer.
Syntax:
public ShortBuffer mark()
Parameter: This method do not accept any parameter.
Return Value: This method returns this ShortBuffer after setting the buffer’s mark at the current position.
Below are the examples to illustrate the mark() method:
Examples 1:
// Java program to demonstrate// mark() method  import java.nio.*;import java.util.*;  public class GFG {      public static void main(String[] args)    {          try {              short[] darr = { 10, 20, 30, 40 };              // creating object of ShortBuffer            // and allocating size capacity            ShortBuffer db = ShortBuffer.wrap(darr);              // try to set the position at index 2            db.position(2);              // Set this buffer mark position            // using mark() method            db.mark();              // try to set the position at index 4            db.position(4);              // display position            System.out.println("position before reset: "                               + db.position());              // try to call reset() to restore            // to the position we marked            db.reset();              // display position            System.out.println("position after reset: "                               + db.position());        }          catch (InvalidMarkException e) {            System.out.println("New position "                               + "is less than "                               + "the position "                               + "marked before ");            System.out.println("Exception throws: "                               + e);        }    }} |
Output:
position before reset: 4 position after reset: 2
Examples 2: To demonstrate InvalidMarkException
// Java program to demonstrate// mark() method  import java.nio.*;import java.util.*;  public class GFG {      public static void main(String[] args)    {          try {              short[] darr = { 10, 20, 30, 40 };              // creating object of ShortBuffer            // and allocating size capacity            ShortBuffer db = ShortBuffer.wrap(darr);              // try to set the position at index 2            db.position(2);              // Set this buffer mark position            // using mark() method            db.mark();              // try to set the position at index 1            db.position(1);              // display position            System.out.println("position before reset: "                               + db.position());              // try to call reset() to restore            // to the position we marked            db.reset();              // display position            System.out.println("position after reset: "                               + db.position());        }          catch (InvalidMarkException e) {            System.out.println("\nNew position "                               + "is less than "                               + "the position "                               + "marked before ");            System.out.println("Exception throws: "                               + e);        }    }} |
Output:
position before reset: 1 New position is less than the position marked before Exception throws: java.nio.InvalidMarkException
Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/ShortBuffer.html#mark–
