Added a tutorial file to explain how to build the Java library of

IEC61850.

javaiec61850/iec61850.i

@@ -24,6 +24,7 @@ DataAttribute* toDataAttribute(ModelNode * MN)
 %}
 %apply int *OUTPUT {IedClientError* error};
 
+%include "libiec61850_common_api.h"
 %include "iec61850_client.h"
 %include "iso_connection_parameters.h"
 %include "mms_client_connection.h"

javaiec61850/tutorial.md

@@ -0,0 +1,76 @@
+# Building
+Before building you should install swig and java.
+
+From the root directory of the libiec61850 project you have to build some of the dependant libraries
+
+> cd ..
+>
+> make clean
+>
+> make INSTALL_PREFIX=/usr/local install
+>
+> make clean
+>
+> make INSTALL_PREFIX=/usr/local dynlib
+
+Now change into the Java project subdirectory
+
+> cd javaiec61850
+>
+> swig -java -I/usr/local/include iec61850.i
+>
+> gcc -fpic -I/usr/lib/jvm/default-java/include -I/usr/lib/jvm/default-java/include/linux -c iec61850_wrap.c
+>
+> ld -shared ../build/libiec61850.so iec61850_wrap.o -o libiec61850.so
+>
+> javac test_javaiec61850.java
+>
+> java test_javaiec61850
+
+This test programme should show an out put of
+
+```sh
+MyThread for IEC61850Server has STARTED
+IEC61850Server has STARTED
+IEC61850Client has connected to the IEC61850Server
+IEC61850Client has read testmodelSENSORS
+IEC61850Client caught a error = 0
+IEC61850Client read a temperature set point of = 0.0
+IEC61850Client read a temperature set point of = 10.0
+IEC61850Server has been Interrupted and STOPPED
+
+```
+
+The CMakeLists file does not exist yet, however it would be a nice to have a build of the java bindings by turning on a BUILD\_JAVA\_BINDINGS flag in CMake from cmake-gui or in command line:
+```sh
+$ cmake -DBUILD_JAVA_BINDINGS=ON .
+```
+Then compile the library and install it.
+
+javaiec61850 library is to be imported calling
+```java
+import iec61850
+```
+
+# Client tutorial
+
+The java bindings works similarly to the python and basic C library ones.
+
+Have a look at the Client, Server and test programme.
+
+For example to create a connection, call:
+
+```java
+  if (con == null) {
+    con = iec61850.IedConnection_create();
+  }
+
+  iec61850.IedConnection_connect(con, error, "localhost", tcpPort);
+
+  conState = iec61850.IedConnection_getState(con);
+
+  if ( conState.toString() == "IED_STATE_CONNECTED" || conState.toString() == "IED_STATE_IDLE") {
+  System.out.println("IEC61850Client has connected to the IEC61850Server" );
+  }
+
+```