The reset() method of java.nio.DoubleBuffer Class is used to reset the position of this buffer to a position which was previously-marked. In this, neither a marked value is changed nor discarded. It helps to recover the previously marked value in the buffer.
Syntax:
public final DoubleBuffer reset()
Parameters: The method does not take any parameters.
Return Value: This method returns this buffer.
Below are the examples to illustrate the reset() method:
Examples 1:
// Java program to demonstrate// reset() method import java.nio.*;import java.util.*; public class GFG { public static void main(String[] args) { try { double[] darr = { 10.5, 20.5, 30.5, 40.5 }; // creating object of DoubleBuffer // and allocating size capacity DoubleBuffer db = DoubleBuffer.wrap(darr); // try to set the position at index 2 db.position(2); // Set this buffer mark position // using mark() method db.mark(); // try to set the position at index 4 db.position(4); // display position System.out.println("position before reset: " + db.position()); // try to call reset() to restore // to the position we marked db.reset(); // display position System.out.println("position after reset: " + db.position()); } catch (InvalidMarkException e) { System.out.println("new position is less than " + "the position we" + " marked before "); System.out.println("Exception throws: " + e); } }} |
Output:
position before reset: 4 position after reset: 2
Examples 2:
// Java program to demonstrate// reset() method import java.nio.*;import java.util.*; public class GFG { public static void main(String[] args) { try { double[] darr = { 10.5, 20.5, 30.5, 40.5 }; // creating object of DoubleBuffer // and allocating size capacity DoubleBuffer db = DoubleBuffer.wrap(darr); // try to set the position at index 2 db.position(2); // Set this buffer mark position // using mark() method db.mark(); // try to set the position at index 4 db.position(1); // display position System.out.println("position before reset: " + db.position()); // try to call reset() to restore // to the position we marked db.reset(); // display position System.out.println("position after reset: " + db.position()); } catch (InvalidMarkException e) { System.out.println("\nnew position is less than " + "the position we" + " marked before "); System.out.println("Exception throws: " + e); } }} |
Output:
position before reset: 1 new position is less than the position we marked before Exception throws: java.nio.InvalidMarkException
Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/DoubleBuffer.html#order–