What is hashCode in Java?

The value 31 was chosen because it is an odd prime . If it were even and the multiplication overflowed, information would be lost, as multiplication by 2 is equivalent to shifting. The advantage of using a prime is less clear, but it is traditional.

The hashCode method is an inbuilt method that returns the integer hashed value of the input value . Here are a few key concepts to remember: Multiple invocations of the hashCode must return the same integer value within the execution of a program unless the Object used within the equals method changes.

hashCode in Java is a function that returns the hashcode value of an object on calling . It returns an integer or a 4 bytes value which is generated by the hashing algorithm. The process of assigning a unique value to an object or attribute using an algorithm, which enables quicker access, is known as hashing.24 Tem 2021