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-
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