how to configure tomcat for Turkey?

[Dharma General]

hello,

(1) i want my JSP application to run with Turkey locale. how should i
configure apache Tomcat 5.x for Turkey?
(2) at present, i want to find out about an error message ---

java.lang.NumberFormatException: For input string: "0,00"
   at sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source)
   at java.lang.Float.parseFloat(Unknown Source)

what is it?

thx