Java String: hashCode() Method
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:
hashCode()
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();
System.out.println();
// Display the hash code.
System.out.println("The hash for " + str + " is " + hash_code);
System.out.println();
}
}
Output:
The hash for Java Exercises. is -1762987343
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