FloatBuffer mark() methods in Java with Examples Last Updated : 10 Sep, 2019 Summarize Comments Improve Suggest changes Share Like Article Like Report 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 // 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 // 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-- Comment More infoAdvertise with us Next Article FloatBuffer allocate() method in Java With Examples R rohitprasad3 Follow Improve Article Tags : Java Java-Functions Java-FloatBuffer Java-NIO package Practice Tags : Java Similar Reads FloatBuffer get() methods in Java with Examples get() The get() method of java.nio.FloatBuffer Class is used to reads the float at the given buffer's current position, and then increments the position. 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