Doubt about creating a instance for String class

[gopal kishan]

Hi All,

I have a doubt about the instance of String class.

eg:
I am declaring three string variable.
String name="myname";
String age = "myage"
String address = new String("myaddress");

please clarify me how many instance will String create.

3 or 1.

thanks in advance

GK

[marc weber]

You may want to take a look at Corey McGlone's JavaRanch article, Strings, Literally. I think this will make it much more clear.

[jiju ka]

The String Literal Pool is refrenced in the article above.
When is the String Literal Pool created? At initialization of jvm or at runtime.
How long String Literal Pool will be maintained?
Does Strings refrenced by String Literal pool ever get garbage collected? Or exists until jvm exits.

[Marilyn de Queiroz]

Moving to Java in General (Intermediate)

[Srinivas Kumar]

I have another doubt on the same.
let us say
public class ImmutableStrings
{
public static void main(String[] args)
{
String test="Test";
test="Testing again";
System.out.println(test);
}
}

output is

Testing again

here the value of String Object test is changing.
Can anyone explain this?

[Junilu Lacar]

You seem to be under the impression that the test variable actually "holds" the string value. It doesn't. It merely references the actual String instance. What is changed is the String object that test refers to, not the Strings themselves. The first assignment makes test refer to the String "Test", the second changes test to refer to the String "Testing again". The two String objects are still immutable.
[ December 01, 2005: Message edited by: Junilu Lacar ]

[Srinivas Kumar]

Thanks for the info lacar :-)