Buffer mark() methods in Java with Examples Last Updated : 04 Feb, 2022 Comments Improve Suggest changes Like Article Like Report The mark() method of java.nio.Buffer Class is used to set this buffer's mark at its position.Syntax: public Buffer mark() Return Value: This method returns this buffer.Below are the examples to 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 { byte[] barr = { 10, 20, 30, 40 }; // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.wrap(barr); // Typecasting ByteBuffer into Buffer Buffer bb1 = (Buffer)bb; // try to set the position at index 2 bb1.position(2); // Set this buffer mark position // using mark() method bb1.mark(); // try to set the position at index 4 bb1.position(4); // display position System.out.println("position before reset: " + bb1.position()); // try to call reset() to restore // to the position we marked bb1.reset(); // display position System.out.println("position after reset: " + bb1.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: 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 { byte[] barr = { 10, 20, 30, 40 }; // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.wrap(barr); // Typecasting ByteBuffer into Buffer Buffer bb1 = (Buffer)bb; // try to set the position at index 2 bb1.position(2); // Set this buffer mark position // using mark() method bb1.mark(); // try to set the position at index 4 bb1.position(1); // display position System.out.println("position before reset: " + bb1.position()); // try to call reset() to restore // to the position we marked bb1.reset(); // display position System.out.println("position after reset: " + bb1.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: 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/Buffer.html#mark-- Comment More infoAdvertise with us Next Article Buffer mark() methods in Java with Examples rohitprasad3 Follow Improve Article Tags : Java Java-Functions Java-NIO package Java-Buffer Practice Tags : Java Similar Reads CharBuffer mark() methods in Java with Examples The mark() method of java.nio.CharBuffer Class is used to set this buffer's mark at its position. Syntax: public CharBuffer mark() Return Value: This method returns this buffer. Below are the examples to illustrate the mark() method: Examples 1: Java // Java program to demonstrate // mark() method i 2 min read ByteBuffer mark() methods in Java with Examples The mark() method of java.nio.ByteBuffer Class is used to set this buffer's mark at its position. Syntax: public ByteBuffer mark() Return Value: This method returns this buffer. Below are the examples to illustrate the mark() method: Examples 1: Java // Java program to demonstrate // mark() method i 2 min read Buffer limit() methods in Java with Examples The limit() method of java.nio.Buffer Class is used to set this buffer's limit. If the position is larger than the new limit then it is set to the new limit. If the mark is defined and larger than the new limit then it is discarded. Syntax: public Buffer limit(int newLimit) Return Value: This method 2 min read Buffer flip() methods in Java with Examples The flip() method of java.nio.ByteBuffer Class is used to flip this buffer. The limit is set to the current position and then the position is set to zero. If the mark is defined then it is discarded. After a sequence of channel-read or put operations, invoke this method to prepare for a sequence of 3 min read Buffer clear() methods in Java with Examples The clear() method of java.nio.ByteBuffer Class is used to clear this buffer. The position is set to zero, the limit is set to the capacity, and the mark is discarded. Invoke this method before using a sequence of channel-read or put operations to fill this buffer. For example: buf.clear(); // Prepa 3 min read Buffer array() methods in Java with Examples The array() method of java.nio.Buffer class is used to return the array that backs the taken buffer. This method is intended to allow array-backed buffers to be passed to native code more efficiently. Concrete subclasses provide more strongly-typed return values for this method. Modifications to thi 3 min read Buffer reset() methods in Java with Examples The reset() method of java.nio.Buffer Class is used to reset this buffer's position to the previously-marked position. Invoking this method neither changes nor discards the mark's value.Syntax: public Buffer reset() Return Value: This method returns this buffer.Below are the examples to illustrate t 2 min read Buffer rewind() methods in Java with Examples The rewind() method of java.nio.ByteBuffer Class is used to rewind this buffer. The position is set to zero and the mark is discarded. Invoke this method before a sequence of channel-write or get operations, assuming that the limit has already been set appropriately. Invoking this method neither cha 2 min read DoubleBuffer limit() methods in Java with Examples The limit() method of java.nio.DoubleBuffer Class is used to modify this DoubleBuffer's limit. This method takes the limit to be set as the parameter and sets that as the new limit of this Buffer. If the mark of this Buffer is already defined and is larger than the new specified limit, then this new 2 min read Like