Re: weird problem with hashtable--CONCLUSION - 未名空间MITBBS历史存档

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Re: weird problem with hashtable--CONCLUSION

Re: weird problem with hashtable--CONCLUSION# Java - 爪哇娇娃

n*a2000-05-06 07:05

1 楼

All right we are all wrong here, it's ACTUALLY a BUG in
jdk1.1.x,
try using jdk1.2.2 and the problem is gone. equals() will be
called and containsKey() will return true.

m*r2000-05-06 07:05

2 楼

I think things should be like this:
When containsKey(o) is called, it calculate the o.hashCode()
and use this integer to look into the correspond position in hashtable,
get the value v and then use v.equals(o) to determine if o is in
the table.
Note: the equals method is called only ONCE.
So I think that's the answer.
Maybe actually, the key in hashtable is o.hashCode() rather than the
object o.

【在 n*****a 的大作中提到】

: All right we are all wrong here, it's ACTUALLY a BUG in
: jdk1.1.x,
: try using jdk1.2.2 and the problem is gone. equals() will be
: called and containsKey() will return true.