Problem with Entity Manager

[harini19]

I'm using netbeans 6.5, glassfish,persistence and mySQL. I'm not able to check whether EntityManager is open or not. Here is the code:
{code}
private String getData1() {
try {
em=javax.persistence.persistence.createEntityManagerFactory("x").createEntityManager;
if (em.isOpen())
{
return("open");
}
else
{
return("close");

}

} catch (Exception nre) {
System.out.println(nre);
return null;
}

}
{code}

but it returns with the error unable to instantiate Entity Manager class. I've @PersistentContext included in the java file. What else to be added here? Or how do I open EntityManager

[michael]

If you're using glassfish (or any other application server), you normally don

[harini19]

I'm attaching the codes here. Pl look

[harini19]

I'm attaching files