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Introduction to Java Programming

Java String: hashCode() Method

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public int hashCode()

The hashCode() method is used to get a hash code from a given string. The hash code for a String object is computed as :

s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1]

where s[i] is the ith character of the string, n is the length of the string, and ^ indicates exponentiation.

Note : The hash value of the empty string is zero.

Java Platform: Java SE 8

Syntax :


Return Value : a hash code value for this object.

Return Value Type: int

Example : Java String hashCode() Method

The following example shows the usage of java String() method.

public class Example {

public static void main(String[] args)
        String str = "Java Exercises.";

        // Get the hash code for the above string.
            int hash_code = str.hashCode();
        // Display the hash code.
System.out.println("The hash for " + str + " is " + hash_code);


The hash for Java Exercises. is -1762987343

Java Code Editor:

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