I found two alternatives in the link
http://mail.openjdk.java.net/pipermail/coin-dev/2009-December/002618.html
The first alternative
int equalByHashThreshold = 2;
public boolean equals(Object anObject) {
if (this == anObject) {
return true;
}
if (anObject instanceof String) {
String anotherString = (String)anObject;
int n = count;
if (n == anotherString.count &&
(equalByHashThreshold == 0 || --equalByHashThreshold == 0) &&
(anotherString.equalByHashThreshold == 0 ||
--anotherString.equalByHashThreshold == 0) &&
hash() == anotherString.hash()) {
[snipped]
}
}
return false;
}
will say that
"A".equals("A") == false
because body of if statement will not be executed
The second alternative
public int hashCode() {
int h = hash;
if (h == 0 || --h == 0) {
int off = offset;
char val[] = value;
int len = count;
for (int i = 0; i < len; i++) {
h = 31*h + val[off++];
}
hash = h;
}
return h;
}
will return sequentially
"A".hashCode() == 65
"A".hashCode() == 64
"A".hashCode() == 64
. . .
I guess that you mean something else.
-Dima
On Fri, Feb 26, 2010 at 1:19 PM, Ulf Zibis <ulf.zi...@gmx.de> wrote:
> Have you seen, that there are some chances to make String#equals little
> faster too:
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6912520
>
> -Ulf
>
>
> Am 25.02.2010 23:07, schrieb Alan Bateman:
>
>> Kelly O'Hair wrote:
>>
>>> Yup. My eyes must be tired, I didn't see that. :^(
>>>
>> Too many repositories in the air at the same time. The webrev has been
>> refreshed. Thanks Ulf.
>>
>>
>>
>
