Re: what is the need for copy constructor in String class?
Joshua Cranmer wrote:
Piper707@hotmail.com wrote:
Hi,
I've always read that strings should be created like this:
String test = "hello" rather than String test = new String ("test").
I understand why this is recommended and the concept of string pools,
but now I can't seem to understand why anybody would want to use the
constructor? why is it provided in the first place?
The biggest reason for the latter invocation that I can imagine off
the top of my head is that test (in the first case) cannot be garbage
collected, but it can in the second case.
But the constant string (the same as test is the first case, but different
in the second) will be equally collectable either way.
There's this, which I very much doubt is the reaon for the Strng(String)
constructor:
private String mutex = new String("protect internals of foo");
synchronized(mutex)
{
...
}
Giving a mutex a meaningful name can help deadlock analysis. using new
String() prevents two mutexes meant to be distinct from accidentally being
the same.
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