The position(int newPosition) method of java.nio.ByteBuffer Class is used to Sets this buffer’s position. If the mark is defined and larger than the new position then it is discarded.
Syntax:
public ByteBuffer position(int newPosition)
Parameters: This method takes the newPosition as parameter which is the new position value. It must be non-negative and no larger than the current limit.
Return Value: This method returns this buffer.
Below are the examples to illustrate the position() method:
Examples 1:
// Java program to demonstrate// position() method  import java.nio.*;import java.util.*;  public class GFG {      public static void main(String[] args)    {        byte[] barr = { 10, 20, 30, 40 };          // creating object of ByteBuffer        // and allocating size capacity        ByteBuffer bb = ByteBuffer.wrap(barr);          // try to set the position at index 2        // using position() method        bb.position(2);          // Set this buffer mark position        bb.mark();          // try to set the position at index 4        // using position() method        bb.position(4);          // display position        System.out.println("position before reset: "                           + bb.position());          // try to call reset() to restore        // to the position we marked        bb.reset();          // display position        System.out.println("position after reset: "                           + bb.position());    }} |
Output:
position before reset: 4 position after reset: 2
Examples 2:
// Java program to demonstrate// position() method  import java.nio.*;import java.util.*;  public class GFG {      public static void main(String[] args)    {        // creating object of ByteBuffer        // and allocating size capacity        ByteBuffer bb = ByteBuffer.allocate(4);          // try to set the position at index 1        // using position() method        bb.position(1);          // putting the value of ByteBuffer        // using put() method        bb.put((byte)10);          // try to set the position at index 3        // using position() method        bb.position(3);          // putting the value of ByteBuffer        // using put() method        bb.put((byte)30);          // display position        System.out.println("ByteBuffer: "                           + Arrays.toString(bb.array()));    }} |
Output:
ByteBuffer: [0, 10, 0, 30]
Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/ByteBuffer.html#position-int-
