🚀 go-pugleaf

OK, first of all, I'm a complete Java novice, but here goes.

I have built a DLL which is providing various services for a Java class.
One of these support functions requires the DLL to call back into the
Java Class.

I'm trying to call (from C++) a function with the following definition:

  public String TextFromTag(String TagName)
  {
    return "TextFromTag(--" + TagName + "--)" ;
  }

(Yes, this doesn't do anything sensible, yet, but it will.)

In my C++ file, I have managed to successfully call a function with the
following definition:

  public String TextFromTag()
  {
    return "TextFromTag(--" + /*TagName +*/ "--)" ;
  }

and I get the correct result.

I can find the function TextFromTag(String TagName).

I try calling it with:

   jstring Temp = ... ;
   jobject RetObj = m_Env->CallObjectMethod(m_Object, ID, Temp ) ;

(Temp is a valid jstring)

When I do so, I just get:

   Exception occurred during event dispatching:
   java.lang.NullPointerException

I'm using JBuilder2 002.000.174.000.English

Any ideas?

(Oh, and BTW, how do I convert a String to an int without going via an
Integer object? As I said, I'm a novice.)

Alan Bellingham
-- 
alanb@episys.com