The mark() method of java.nio.FloatBuffer Class is used to mark the current position of this FloatBuffer as the mark of this buffer.
Syntax:
public final FloatBuffer mark()
Parameters: The method does not take any parameters.
Return Value: This method returns this FloatBuffer after setting the buffer’s mark at the current position.
Below examples 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 { float[] farr = { 10.5f, 20.5f, 30.5f, 40.5f }; // creating object of FloatBuffer // and allocating size capacity FloatBuffer fb = FloatBuffer.wrap(farr); // try to set the position at index 2 fb.position(2); // Set this buffer mark position // using mark() method fb.mark(); // try to set the position at index 4 fb.position(4); // display position System.out.println("position before reset: " + fb.position()); // try to call reset() to restore // to the position we marked fb.reset(); // display position System.out.println("position after reset: " + fb.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 { float[] farr = { 10.5f, 20.5f, 30.5f, 40.5f }; // creating object of FloatBuffer // and allocating size capacity FloatBuffer fb = FloatBuffer.wrap(farr); // try to set the position at index 2 fb.position(2); // Set this buffer mark position // using mark() method fb.mark(); // try to set the position at index 1 fb.position(1); // display position System.out.println("position before reset: " + fb.position()); // try to call reset() to restore // to the position we marked fb.reset(); // display position System.out.println("position after reset: " + fb.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/FloatBuffer.html#mark–
