Hi, can anyone please tell me that why new object of String class hashcode returns 0 as output.

Question

Is it because no object is created?

String s = new String();
System.out.println(s.hashcode());
Output is 0.

Answer 1

The hash code for a String object is computed as :

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

For empty string value of "n" is zero hence hash code value is also zero