ByteBuffer hashCode() method in Java with Examples Last Updated : 18 Jan, 2023 Summarize Comments Improve Suggest changes Share Like Article Like Report The hashCode() method of java.nio.ByteBuffer class is used to return the current hash code of this buffer. The hash code of a byte buffer depends only upon its remaining elements; that is, upon the elements from position() up to, and including, the element at limit() - 1. Because buffer hash codes are content-dependent, it is inadvisable to use buffers as keys in hash maps or similar data structures unless it is known that their contents will not change. Syntax: public int hashCode() Return Value: This method returns the current hash code of this buffer. Below are the examples to illustrate the hashCode() method: Examples 1: Java // Java program to demonstrate // hashCode() 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(12); // putting the int value in the bytebuffer bb.asIntBuffer() .put(10) .put(20) .put(30); // rewind the Bytebuffer bb.rewind(); // print the ByteBuffer System.out.println("Original ByteBuffer: "); for (int i = 1; i <= 3; i++) System.out.print(bb.getInt() + " "); // rewind the Bytebuffer bb.rewind(); // Reads the Int at this buffer's current position // using hashCode() method int value = bb.hashCode(); // print the int value System.out.println("\n\nByte Value: " + value); } } Output:Original ByteBuffer: 10 20 30 Byte Value: -219122491 Examples 2: Java // Java program to demonstrate // hashCode() 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(12); // Reads the Int at this buffer's current position // using hashCode() method int value = bb.hashCode(); // print the int value System.out.println("Byte Value: " + value); } } Output:Byte Value: -293403007 Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/ByteBuffer.html#hashCode-- Comment More infoAdvertise with us Next Article BitSet hashCode Method in Java with Examples R rohitprasad3 Follow Improve Article Tags : Java Java-Functions Java-NIO package Java-ByteBuffer Practice Tags : Java Similar Reads Byte hashCode() method in Java with examples The hashCode() method of Byte class is a built in method in Java which is used to return the hash code of the ByteObject. Note: The hashCode() returns the same value as intValue(). Syntax ByteObject.hashCode() Return Value: It return an int value which represents the hashcode of the specified Byte o 2 min read ByteBuffer get() method in Java with Examples get() The get() method of java.nio.ByteBuffer class is used to read the byte at the buffer's current position, and then increments the position. Syntax : public abstract byte get() Return Value: This method returns the byte at the buffer's current position. Throws: This method throws BufferUnderflow 6 min read BitSet hashCode Method in Java with Examples The hashCode() Method of BitSet class in Java is used to fetch the hash code value of a particular this BitSet. This returned hash codes value depends on the set bits of the bit set being passed. Syntax: BitSet.hashCode() Parameters: The method does not accept any parameters. Return Value: The metho 2 min read Date hashCode() method in Java with Examples The hashCode() method of Java Date class returns a value which is a hash code for this object. Syntax: public int hashCode() Parameters: The function does not accept any parameter. Return Value: It returns a hashCode value for this object. Exception: The function does not throws any exception. Progr 2 min read DateFormat hashCode() method in Java with Examples The hashCode() Method of DateFormat class is used to return the hash code value of this DateFormat object. The hash code is of integer type. Syntax: public int hashCode() Parameters: The method does not take any parameters. Return Value: The method returns the hash code value of this DateFormat obje 2 min read Double hashCode() method in Java with examples The hashCode() method of Double class is a built-in method use to return the hashcode value of this Double object. Syntax: DoubleObject.hashCode() Parameters: It takes no parameters. Return Type: It returns an int value. The value returned is (int)(v^(v>>>32)) where v is a long variable equ 1 min read Like