tdlight/example/java/README.md
levlam 1ea7510500 Update build instuctions for MSVC 2019 + 32-bit + new CMake.
GitOrigin-RevId: 4860583c1fc22ef9f40cdcf602fd8e49410254e5
2019-09-07 02:14:49 +03:00

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# TDLib Java example
To run this example, you will need installed JDK >= 1.6.
For Javadoc documentation generation PHP is needed.
TDLib should be prebuilt for using with Java and installed to local subdirectory `td/` as follows:
```
cd <path to TDLib sources>
mkdir jnibuild
cd jnibuild
cmake -DCMAKE_BUILD_TYPE=Release -DTD_ENABLE_JNI=ON -DCMAKE_INSTALL_PREFIX:PATH=../example/java/td ..
cmake --build . --target install
```
If you want to compile TDLib for 32-bit/64-bit Java on Windows using MSVC, you will also need to add `-A Win32`/`-A x64` option to CMake.
In Windows, use Vcpkg toolchain file by adding parameter -DCMAKE_TOOLCHAIN_FILE=<VCPKG_DIR>/scripts/buildsystems/vcpkg.cmake
Then you can build this example:
```
cd <path to TDLib sources>/example/java
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release -DTd_DIR=<full path to TDLib sources>/example/java/td/lib/cmake/Td -DCMAKE_INSTALL_PREFIX:PATH=.. ..
cmake --build . --target install
```
Compiled TDLib shared library and Java example after that will be placed in bin/ and Javadoc documentation in `docs/`.
Now you can run Java example:
```
cd <path to TDLib sources>/example/java/bin
java '-Djava.library.path=.' org/drinkless/tdlib/example/Example
```
If you get "Could NOT find JNI ..." error from CMake, you need to specify to CMake path to the installed JDK, for example, "-DJAVA_HOME=/usr/lib/jvm/java-8-oracle/".
If you get java.lang.UnsatisfiedLinkError with "Can't find dependent libraries", you may also need to copy some dependent shared OpenSSL and zlib libraries to `bin/`.
In case you compiled the example as 32-bit version, you may need to give -d32 parameter to Java.