Java hashCode () method

Java String class

hashCode () method returns a hash code string.

String object hash code based on the following formula:

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

Using int arithmetic, where s [i] is the i-th character of the string, n is the length of the string, and ^ indicates exponentiation. Empty string hash value is 0.

grammar

public int hashCode()

parameter

• no.

return value

Returns the hash code value for the object.

Examples

public class Test {
	public static void main(String args[]) {
		String Str = new String("www.w3big.com");
		System.out.println("字符串的哈希码为 :" + Str.hashCode() );
	}
}

The above program execution results:

字符串的哈希码为 :321005537

Java String class