Class ThreadLocalNumberFormat

  extended by fc.util.ThreadLocalNumberFormat

public final class ThreadLocalNumberFormat
extends Object

Useful to store thread-local number format instances. This class is intended for servlets/molly pages. Instead of static get/set methods, this class must be instantiated and the instance methods used to get/set the calendar object. This allows multiple instances of this class in the webapp, with each instance being able to get/set a separate calendar. [If the methods in this class were static, then only 1 calendar could be get/set per thread].

Each thread must remember to individually create a separate calendar instance and store it via the set method. The usage idiom is:

//WebApp has a map of ThreadLocalNumberFormat's and also a instance variable
//pointing to a default ThreadLocalNumberFormat
ThreadLocalNumberFormat mynf = WebApp.getThreadLocalNumberFormat("foo");

if (mynf.isNull())  {

NumberFormat nf = mynf.get();

Note, the lines in red are always needed anywhere/anytime this class is used. (note, it just so happens that the NumberFormat.getInstance() returns (at least for now) a new object every time it is called, which is why it is being used in the example above, else we would have to manually create a new NumberFormat instance instead).

Constructor Summary
Method Summary
 NumberFormat get()
 boolean isNull()
static void main(String[] args)
 void set(NumberFormat nf)
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public ThreadLocalNumberFormat()
Method Detail


public NumberFormat get()


public void set(NumberFormat nf)


public boolean isNull()


public static void main(String[] args)
                 throws Exception