For java calls lua, Here presents a new method, which ues cle developed by srplab.

A function “Add” is defined in lua which returns the sum of two input integers, the function also call java method “Show” to print the result.

There are three steps:

1.       Init cle, create service group, and create service.

2.       Create interface object, and defines a new function “Add” of it.

3.       Write function code of Add.

require "libstarcore"

--Step1 : Init cle, create service group, and create service

Service = libstarcore._InitSimple("AddFunctionService","123",0,0);

--Step2 : Create interface object, and define function Add

Obj=Service:_New("TestClass");

--Step3 : Add function code

function Obj:Add(x,y)

  --call back to script function

  self:Show(x+y);

  return x+y;

end

For java code calls the above lua file, there are four steps;

1.       Init cle, create service group, import lua file,  and create service.

2.       Define extends class of StarObjectClass, which implement callback function “Show”.

3.       Create Instance of object “TestClass” defined in lua.

4.       call function “Add”.

import com.srplab.www.starcore.*;

//--Step2 : Define extends class of StarObjectClass and implements callback function “Show”.

class MyObjectClass extends StarObjectClass{

   public void Show( StarObjectClass self,int para )

   {

     System.out.println("print from java call back "+para);

     return;

   }

         public MyObjectClass(StarObjectClass srcobj){

                   super(srcobj);

         }     

}

public class java_call{

         public static void main(String[] args){

         //--Step1 : Init cle, create service group,import lua file,  and create service

                   StarCoreFactory starcore= StarCoreFactory.GetFactory();

                   StarServiceClass Service=starcore._InitSimple("test","123",0,0,"AddFunctionService.lua");

                   //--Step3 : Create Instance of object “TestClass” defined in lua.

                   MyObjectClass a = new MyObjectClass( Service._GetObject("TestClass")._New() );

                   //--Step4 : call function “Add”.

        System.out.println("Add returns : "+a._Call("Add",12,34));

        starcore._ModuleExit();

    }

}