string manipulation

[Vinney Shanmugam]

I just want to know, whether the following lines of code inside a constructor, might create a performance issue........

String test;

<<<<< test gets it's value from user >>>>>

test = test + ".log";

every time, the initial string gets lost and new string is referred by <test>.log

I am not sure of this. Please throw some light on this.

[Campbell Ritchie]

You only get performance problems with + applied to Strings when you do it repeatedly. There is no performance problem when it is only used in a single statement. Anyway, the 3 seconds it takes the user to enter the value will (at least slightly) outweigh the 2 microseconds ti takes to catenate ".log".

[Vinney Shanmugam]

Thanks for the Info.

But, if the class gets instantiated for 10 times, atleast 10 strings without references will be there in the memory, right?

say, test = "tomcat"

test = test + ".log" after this, test = "tomcat.log", where "tomcat" string is lost in the memory. Over a period of time will this through out of memory or delay in response to requests due to performance?