acdk_java Intro

With the module acdk_java you can access ACDK objects from Java and Java objects from ACDK.

Content of this chapter:

Java Objects as generic ACDK DMI Server
Java generic ACDK DMI Client

Java Objects as generic ACDK DMI Server

Here is a simple sample, which shows how to use Java classes and objects in ACDK code:



  // create a new java object
  ::acdk::java::RJavaObject jo = new ::acdk::java::JavaObject("java/lang/StringBuffer", (const char*)"Hello");
  
  // call the method append of the the java object
  jo->invoke("append", (const char*)" Java from ACDK");
  
  // call the method toString of the Java object
  RObject str = (RString)jo->invoke("toString");
  
  // get the static public member of the java object
  RObject jout = ::acdk::java::JavaObject::peek_static("java/lang/System", "out");
  
  // call the invoke method of the ::acdk::langObject
  // The DMI automatically dispatches the call to the 
  // corresponding Java Object
  jout->invoke("println", str);
  
  RObject aout = System::out;
  // Same interface works also with ACDK objects.
  aout->invoke("println", str);

Java generic ACDK DMI Client

In the same way you can control in Java every other DMI Server, like ACDK Objects, COM or CORBA objects:



import acdk.java.AcdkObject;

class ACDK_Test
{
  public static void main(String[] args)
  {
    // get the ACDK version of StringBuffer
    AcdkObject asb = AcdkObject.New("acdk/lang/StringBuffer", "Hello");
    // call the method append of the ACDK StringBuffer
    asb.invoke("append", " ACDK from Java");
    
    // Get the Standard output writer from ACDK System class
    AcdkObject aout = (AcdkObject)AcdkObject.peek_static("acdk/lang/System", "out");
    
    // print the Hello message using ACDK
    aout.invoke("println", asb.invoke("toString"));
  }
}