Boolean hashCode return value

Asked Jul 30 '15 at 12:45

Active Jul 30 '15 at 12:45

Viewed 43 times

Why Boolean hashCode is either 1231 or 1237? i.e.

public static int hashCode(boolean value) {
        return value ? 1231 : 1237;
    }

any specific reason? We are passing String value "true" or "false" in the Boolean constructor so why not we are using the hashcode of these Strings("true" and "false") itself? or we can use 0 and 1

asked Jul 30 '15 at 12:45

1

I'm not sure I understand your question? – brso05 Jul 30 '15 at 12:47
1

A boolean only has 2 possible values `true` and `false` the hashcode for `true` will be the same in the same execution and the hashcode for `false` will be the same within the same execution... – brso05 Jul 30 '15 at 12:48
@brso05 Actually it will always be the same, as specified in its API documentation. – Marko Topolnik Jul 30 '15 at 12:51
@MarkoTopolnik that's fine I am just talking about the `HashCode` specification (set of rules/contract) I didn't realize they had a specific rule for booleans... – brso05 Jul 30 '15 at 12:59
@MarkoTopolnik If you look at my statement it is technically correct ;) it will always be the same in the same execution... – brso05 Jul 30 '15 at 13:00
http://docs.oracle.com/javase/7/docs/api/java/lang/Boolean.html#hashCode() – brso05 Jul 30 '15 at 13:02
@brso05 "Today Earth is a planet" is another _technically_ correct statement. – Marko Topolnik Jul 30 '15 at 13:09
@MarkoTopolnik yes you are correct nice! – brso05 Jul 30 '15 at 13:12

Boolean hashCode return value

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