Update Java example

examples/java/README.md

@@ -1,11 +1,54 @@
 # Java example
 
-Build or download the `libzt-${VERSION}.jar`, and copy it to this directory.
+## Build the JAR
+
+From the top-level `libzt` directory:
 
 ```
-make
-java -cp ".:libzt-${VERSION}.jar" Example server id_path 0123456789abcdef 9997
-java -cp ".:libzt-${VERSION}.jar" Example client id_path 0123456789abcdef ip.ip.ip.ip 9997
+./build.sh host-jar
+```
+
+Should result in something like:
+
+```
+dist
+└── linux-x64-jar-release
+    └── pkg
+        └── libzt-1.8.10.jar
+```
+
+Copy the JAR to the working directory:
+
+*NOTE: If you've built multiple variants of the JAR such as debug/release or mac/linux you will need to specify their exact path in the following command. If not, you can use the wildcard form:*
+
+
+```
+cp -f dist/*/pkg/*.jar examples/java/libzt.jar
+```
+
+Navigate to the `examples/java` directory and extract the `libzt.so|dylib|dll` dynamic library from the JAR into the working directory:
+
+```
+jar xf *.jar libzt.dylib libzt.so libzt.dll
+```
+
+## Build the example app
+
+```
+javac -cp *.jar Example.java 
+```
+
+## Run the example app
+
+```
+java -Djava.library.path=. -cp ".:libzt.jar" Example server id_path 0123456789abcdef 9997
+java -Djava.library.path=. -cp ".:libzt.jar" Example client id_path 0123456789abcdef ip.ip.ip.ip 9997
+```
+
+## Clean
+
+```
+rm -rf *.dylib *.so *.jar *.dll *.class
 ```
 
 ## Links