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-