The position(int newPosition) method of java.nio.Buffer Class is used to set this buffer’s position. If the mark is defined and larger than the new position then it is discarded.
Syntax:
public Buffer 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);          // Typecasting ByteBuffer into Buffer        Buffer bb1 = (Buffer)bb;          // try to set the position at index 2        // using position() method        bb1.position(2);          // Set this buffer mark position        bb1.mark();          // try to set the position at index 4        // using position() method        bb1.position(4);          // display position        System.out.println("position before reset: "                           + bb.position());          // try to call reset() to restore        // to the position we marked        bb1.reset();          // display position        System.out.println("position after reset: "                           + bb1.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);          // Typecasting ByteBuffer into Buffer        Buffer bb1 = (Buffer)bb;          // try to set the position at index 1        // using position() method        bb1.position(3);          // display position        System.out.println("position before clear: "                           + bb1.position());          // try to clear the Buffer        // using clear() method        bb1.clear();          // display position        System.out.println("position after clear: "                           + bb1.position());    }} |
Output:
position before clear: 3 position after clear: 0
Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/Buffer.html#position-int-
