Move Java wrapper build instructions into the project README

Fixes #6.

Author: terryburton

README.md

@@ -103,12 +103,18 @@ A specific compiler can be chosen by setting the CC argument for example:
 
     make CC=clang
 
+
+#### Development targets
+
 There are a number of other targets that are useful for library development
 purposes:
 
     make test [SANITIZE=yes]  # Run the unit test suite, optionally building using LLVM sanitizers.
     make fuzzer               # Build fuzzers for exercising the individual encoders. Requires LLVM libfuzzer.
 
+
+#### JavaScript / WASM build
+
 The WASM build artifacts can be generated by first installing and activating
 the Emscripten SDK and then running:
 
@@ -120,6 +126,24 @@ launched from the project home directory with:
     docker run --rm -v $(pwd):/src -u $(id -u):$(id -g) emscripten/emsdk  make -C src/c-lib wasm [JSONLY=yes]
 
 
+#### Java wrapper
+
+The Java wrapper for the Syntax Engine can be built by first compiling the
+Syntax Engine C library as a static library, and then building the wrapper
+itself:
+
+    make -C src/c-lib -j `nproc` libstatic
+    ant -f src/java/build.xml test
+
+To use the wrapper in a Java project it is sufficient to place the generated
+`src/java/libgs1encoders.{jar,so}` files into accessible locations, then:
+
+  * At compile time and runtime, add the .jar file into the project's
+    classpath.
+  * At runtime, add the directory containing the .so file into
+    `java.library.path`.
+
+
 Installing the Pre-built Demo Console Application
 -------------------------------------------------
 

src/java/build.xml

@@ -15,16 +15,6 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 
-
-This solution builds a JNI library (.jar and .so files) that wraps the GS1
-Syntax Engine.
-
-It is sufficient to place the built libgs1encoders.{jar,so} files into
-accessible locations, then at runtime:
-
-  - Add the .jar file into the classpath.
-  - Add the directory containing the .so file into java.library.path.
-
 -->
 
 <project name="gs1encoders" default="all" basedir="." xmlns:if="ant:if" xmlns:unless="ant:unless">