Obtain the hash code for a string in Java

Fendadis John

Answered on 19th Feb, 2019

The hashCode() method is used to obtain the hash code for a string. This method does not accept any parameters as it is a default method and it returns a hash code value.

A program that demonstrates the hashCode() method in Java is given as follows:

Example

 Live Demo

import java.io.*;
public class Demo {
   public static void main(String args[]) {
      String str = new String("The sky is blue");
      System.out.println("The string is: " + str);
      System.out.println("The Hashcode for the string is: " + str.hashCode());
   }
}

Output

The string is: The sky is blue
The Hashcode for the string is: -729257918

Now let us understand the above program.

The string str is defined. Then the string is printed and its HashCode is also printed using the hashCode() method. A code snippet which demonstrates this is as follows:

String str = new String("The sky is blue");
System.out.println("The string is: " + str);
System.out.println("The Hashcode for the string is: " + str.hashCode());