diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 60f3aa9..d141e5e 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -14,11 +14,11 @@ jobs:
     - name: Install Dependencies
       run: sudo apt-get install doxygen
     - name: Build
-      run: doxygen Doxyfile
+      run: make docs
     - name: Deploy
       uses: JamesIves/github-pages-deploy-action@releases/v3
       with:
         ACCESS_TOKEN: ${{ secrets.ACCESS_TOKEN }}
         BASE_BRANCH: master # The branch the action should deploy from.
         BRANCH: gh-pages # The branch the action should deploy to.
-        FOLDER: docs/html # The folder the action should deploy.
+        FOLDER: docs/ # The folder the action should deploy.
diff --git a/Doxyfile b/Doxyfile
index d3c65d5..24373ee 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -8,7 +8,7 @@ PROJECT_NAME           = yacx - Yet Another CudaExecutor
 PROJECT_NUMBER         = 0.6.2
 PROJECT_BRIEF          = "wrapper to easily compile and execute cuda kernels"
 PROJECT_LOGO           =
-OUTPUT_DIRECTORY       = "docs"
+OUTPUT_DIRECTORY       = "docs/cpp"
 CREATE_SUBDIRS         = NO
 ALLOW_UNICODE_NAMES    = NO
 OUTPUT_LANGUAGE        = English
@@ -122,49 +122,19 @@ FILE_PATTERNS          = *.c \
                          *.cxx \
                          *.cpp \
                          *.c++ \
-                         *.java \
-                         *.ii \
-                         *.ixx \
-                         *.ipp \
-                         *.i++ \
-                         *.inl \
-                         *.idl \
-                         *.ddl \
-                         *.odl \
                          *.h \
                          *.hh \
                          *.hxx \
                          *.hpp \
                          *.h++ \
-                         *.cs \
-                         *.d \
-                         *.php \
-                         *.php4 \
-                         *.php5 \
-                         *.phtml \
-                         *.inc \
                          *.m \
                          *.markdown \
                          *.md \
                          *.mm \
-                         *.dox \
-                         *.py \
-                         *.pyw \
-                         *.f90 \
-                         *.f95 \
-                         *.f03 \
-                         *.f08 \
-                         *.f \
-                         *.for \
-                         *.tcl \
-                         *.vhd \
-                         *.vhdl \
-                         *.ucf \
-                         *.qsf \
-                         *.ice
+                         *.dox
 RECURSIVE              = YES
 EXCLUDE_SYMLINKS       = NO
-EXCLUDE_PATTERNS       =
+EXCLUDE_PATTERNS       = */jni/*
 EXCLUDE_SYMBOLS        =
 EXAMPLE_PATH           = "examples"
 EXAMPLE_PATTERNS       = *
diff --git a/README.MD b/README.MD
index a30fd84..357d491 100644
--- a/README.MD
+++ b/README.MD
@@ -10,19 +10,24 @@ wrapper to easily compile and execute cuda kernels
 - online compilation with NVRTC
 - template kernels
 - logging system
-- simple to understand exceptions
-- time kernel execution as well as uploading and downloading arguments to and from the device
+- descriptive exceptions
+- benchmarking
+  - time kernel execution as well as uploading and downloading arguments to and from the device
 
 for more see the [changelog](./CHANGELOG.md)
 
 ## Requirements
 
-  - [Cuda Toolkit >= V7.0](https://developer.nvidia.com/cuda-toolkit)
-  - c++17 (just to build)
+  - [Cuda Toolkit >= V7.0 (recommended 9.3)](https://developer.nvidia.com/cuda-toolkit)
+  - C++17 (just to build)
+  - JDK >= 8 (to build the JNI)
 
-## Usage
+## C++
+
+### Usage
 
 ```c++
+// file.cpp
 #include "yacx/main.hpp"
 #include <algorithm>
 #include <experimental/iterator>
@@ -85,7 +90,7 @@ int main() {
 }
 ```
 
-### Compile
+#### Compile
 
 download the latest version of the library from the [releases](https://github.com/ZerataX/yacx/releases/latest) section or build it yourself:
 
@@ -98,7 +103,7 @@ make -C build yacx-jni
 
 and then compile with:
 ```console 
-g++ -Wall -Wextra --pedantic -lyacx -lnvrtc -lcuda -L $(CUDA_PATH)/lib64 -Wl,-rpath,$(CUDA_PATH)/lib64 file.cpp
+g++ -lyacx -lnvrtc -lcuda -L $(CUDA_PATH)/lib64 -Wl,-rpath,$(CUDA_PATH)/lib64 file.cpp
 ```
 
 some syntatic sugar is given using templates, which requires you to include the headers when building:
@@ -106,13 +111,7 @@ some syntatic sugar is given using templates, which requires you to include the
 g++ -Wall -Wextra --pedantic -lyacx -lnvrtc -lcuda -L $(CUDA_PATH)/lib64 -Wl,-rpath,$(CUDA_PATH)/lib64 -I include/yacx file.cpp
 ```
 
-## Examples
-
-yacx comes with many examples using a multitude of different kernels with hostcode in c++,java and scala
-
-### C++
-
-#### Run Examples
+### Run Examples
 
 ```console
 # list examples
@@ -123,22 +122,80 @@ examples/example_saxpy.cpp
 examples/example_program.cpp
 examples/example_gauss.cpp
 # compile example
-$ make example_program
+$ cmake -H. -Bbuild
+$ make -C build example_program
 # run example
-$ make run
+$ ./build/examples/bin/example_program
 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8
 ```
 
-## Tests
+### Tests
 
 Require the [Catch2](https://github.com/catchorg/Catch2) test-framework
 
 ```console
-$ make check
+$ cmake -H. -Bbuild
+$ make -C build tests
+$ pushd build/test/bin/
+$ ./tests
+$ popd
 ```
 
 For more info read the [contribution guideline](https://github.com/ZerataX/yacx/blob/master/CONTRIBUTING.md#test)
 
+## Java
+
+### Run Examples
+
+```console
+# for autocompletion
+$ source yacx-completion.bash
+# compile example
+$ ./yacx build-java
+# list examples
+$ ./yacx execute-java
+!! parameter needed, select one of the following
+ExampleSimpleGEMMBenchmark
+ExampleFastGEMM
+ExampleSimpleGEMM
+...
+$ ./yacx.sh execute-java ExampleFastGEMM
+```
+
+### Tests
+
+```console
+# build JNI and Test Classes
+$ cmake -H. -Bbuild
+$ make -C build JNITestClasses
+# link kernels to execution folder
+$ mkdir build/java/bin/examples
+$ ln -s $(realpath examples/kernels/) build/java/bin/examples/kernels
+# execute tests
+$ pushd build/java/bin
+$ java -Djava.library.path=../../ -jar src/junit-platform-console-standalone-1.5.2.jar --class-path . --scan-class-path
+$ popd
+```
+
+## Scala
+
+### Run Examples
+
+```console
+# for autocompletion
+$ source yacx-completion.bash
+# compile example
+$ ./yacx build-scala
+# list examples
+$ ./yacx execute-scala
+!! parameter needed, select one of the following
+ExampleFilterBenchmark
+ExampleFilter
+ExampleFastGEMM
+...
+$ ./yacx.sh execute-scala ExampleFastGEMM
+```
+
 ## Contributing
 
 Make sure you agree to the [code of conduct](./CODE_OF_CONDUCT.md) and read the [contribution guideline](https://github.com/ZerataX/yacx/blob/master/CONTRIBUTING.md)
diff --git a/examples/makefile b/examples/makefile
deleted file mode 100644
index 52b6d63..0000000
--- a/examples/makefile
+++ /dev/null
@@ -1,25 +0,0 @@
-CC := g++ # This is the main compiler
-# CC := clang --analyze # and comment out the linker last line for sanity
-
-SRCDIR := .
-INCDIR := ../include
-BUILDDIR := ../build
-TARGET := ../bin/runner
- 
-SRCEXT := cpp
-HEADDEREXT := hpp
-SOURCES := $(shell find $(SRCDIR) -maxdepth 1 -type f -not -path '*tests*' -name '*.$(SRCEXT)')
-HEADERS := $(shell find $(LIBDIR) -type f -name *.$(HEADDEREXT))
-OBJECTS := $(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(SOURCES:.$(SRCEXT)=.o))
-CFLAGS := -std=c++17 -Wall -g -DNVRTC_GET_TYPE_NAME=1
-LIB := -lnvrtc -lcuda -L $(CUDA_PATH)/lib64 -Wl,-rpath,$(CUDA_PATH)/lib64 
-INC := -I $(INCDIR) -I $(CUDA_PATH)/include
-
-# Build
-all: $(OBJECTS)
-
-$(BUILDDIR)/%.o: $(SRCDIR)/%.$(SRCEXT)
-	@echo "SOURCES: $(SOURCES)"
-	@echo " $(CC) $(CFLAGS) $(INC) -c -o $@ $<"; $(CC) $(CFLAGS) $(INC) -c -o $@ $<
-
-.PHONY: all
\ No newline at end of file
diff --git a/makefile b/makefile
index 9175332..8e7018a 100644
--- a/makefile
+++ b/makefile
@@ -1,5 +1,4 @@
-CC := g++ # This is the main compiler
-# CC := clang --analyze # and comment out the linker last line for sanity
+ANALYZER := clang --analyze
 LINTER := cpplint
 FORMATER := clang-format
 MKDIR_P = mkdir -p
@@ -10,9 +9,7 @@ VENDOR := exclude
 TESTDIR := test
 BUILDDIR := build
 EXAMPLEDIR := examples
-TARGET := bin/runner
-TESTTARGET := bin/tester
-DIRS := bin build
+DIRS := ${BUILDDIR}
 
 SRCEXT := cpp
 HEADDEREXT := hpp
@@ -20,65 +17,26 @@ SOURCES := $(shell find $(SRCDIR) -maxdepth 1 -type f -name '*.$(SRCEXT)')
 TESTS := $(shell find $(TESTDIR) -type f -name '*.$(SRCEXT)')
 EXAMPLES := $(shell find $(EXAMPLEDIR) -maxdepth 1 -type f -name '*.$(SRCEXT)')
 HEADERS := $(shell find $(LIBDIR) -type f -name '*.$(HEADDEREXT)')
-OBJECTS := $(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(SOURCES:.$(SRCEXT)=.o))
-TEST_OBJ = $(OBJECTS) $(patsubst $(TESTDIR)/%,$(BUILDDIR)/%,$(TESTS:.$(SRCEXT)=.o))
-CFLAGS := -std=c++17 -Wall -g -DNVRTC_GET_TYPE_NAME=1
-LIB := -lnvrtc -lcuda -L $(CUDA_PATH)/lib64 -Wl,-rpath,$(CUDA_PATH)/lib64
-INC := -I $(INCDIR) -I $(CUDA_PATH)/include
-
-# Build
-example_program: example
-	@echo " $(CC) build/example_program.o $(OBJECTS) -o $(TARGET) $(LIB)"; $(CC) build/example_program.o $(OBJECTS) -o $(TARGET) $(LIB)
-example_template: example
-	echo " $(CC) build/example_template.o $(OBJECTS) -o $(TARGET) $(LIB)"; $(CC) build/example_template.o $(OBJECTS) -o $(TARGET) $(LIB)
-example_saxpy: example
-	@echo " $(CC) build/example_saxpy.o $(OBJECTS) -o $(TARGET) $(LIB)"; $(CC) build/example_saxpy.o $(OBJECTS) -o $(TARGET) $(LIB)
-example_matrix_multiply: example
-	@echo " $(CC) build/example_matrix_multiply.o $(OBJECTS) -o $(TARGET) $(LIB)"; $(CC) build/example_matrix_multiply.o $(OBJECTS) -o $(TARGET) $(LIB)
-example_gauss: example
-	@echo " $(CC) build/example_gauss.o $(OBJECTS) -o $(TARGET) $(LIB)"; $(CC) build/example_gauss.o $(OBJECTS) -o $(TARGET) $(LIB)
-example_logger: example
-	@echo " $(CC) build/example_logger.o $(OBJECTS) -o $(TARGET) $(LIB)"; $(CC) build/example_logger.o $(OBJECTS) -o $(TARGET) $(LIB)
-example: directories $(OBJECTS)
-	+$(MAKE) -C examples
 
 directories: ${DIRS}
 
 ${DIRS}:
 	${MKDIR_P} ${DIRS}
 
-$(BUILDDIR)/%.o: $(SRCDIR)/%.$(SRCEXT)
-	@echo " $(CC) $(CFLAGS) $(INC) -c -o $@ $<"; $(CC) $(CFLAGS) $(INC) -c -o $@ $<
-
 clean:
 	@echo " Cleaning..."; 
-	@echo " $(RM) -r $(BUILDDIR) $(TARGET)"; $(RM) -r $(BUILDDIR) $(TARGET)
-
+	@echo " $(RM) -r $(DIRS) docs/{java,html,latex}"; $(RM) -r $(DIRS) docs/{java,html,latex}
 
-# Execute
-run:
-	@$(TARGET)
-
-# Format
 format:
 	$(FORMATER) -i -style=file $(SOURCES) $(HEADERS) $(TESTS) $(EXAMPLES)
 
-# Linter
 lint:
 	$(LINTER) --root=${CURDIR} --recursive .
 	#clang-tidy src/ -system-headers=false
 
-# Tests
-init_submodules:
-	-git submodule update --init --recursive
-
-${TESTTARGET}: init_submodules directories $(OBJECTS)
-	+$(MAKE) -C test
-	@echo " Linking... $(TEST_OBJ)";
-	@echo " $(CC) $(TEST_OBJ) -o $(TESTTARGET) $(LIB)"; $(CC) $(TEST_OBJ) -o $(TESTTARGET) $(LIB)
-
-check: $(TESTTARGET)
-	@$(TESTTARGET) -d yes
+docs:
+	doxygen Doxyfile
+	javadoc -d docs/java -sourcepath src/main/java yacx
 
-.PHONY: clean, lint, directories, format, init_submodules, check, run
+.PHONY: clean, lint, directories, format, docs
 
diff --git a/shell.nix b/shell.nix
index a12ac4a..ac83df8 100644
--- a/shell.nix
+++ b/shell.nix
@@ -8,7 +8,8 @@ let fhs = pkgs.buildFHSUserEnv {
                  gnupg
                  autoconf
                  curl
-		 cmake
+                 cmake
+                 doxygen
                  procps
                  gnumake
                  gcc7
@@ -20,11 +21,11 @@ let fhs = pkgs.buildFHSUserEnv {
                  linuxPackages.nvidia_x11
                  libGLU
                  libGL
-		 xorg.libXi xorg.libXmu freeglut
+                 xorg.libXi xorg.libXmu freeglut
                  xorg.libXext xorg.libX11 xorg.libXv xorg.libXrandr zlib 
-		 ncurses5
-		 stdenv.cc
-		 binutils
+                 ncurses5
+                 stdenv.cc
+                 binutils
                  jdk12
                 ];
           multiPkgs = pkgs: with pkgs; [ zlib ];
@@ -34,8 +35,8 @@ let fhs = pkgs.buildFHSUserEnv {
                   export JAVA_HOME=${pkgs.jdk12.home}
                   export PATH=$CUDA_PATH/bin:$PATH
                   # export LD_LIBRARY_PATH=${pkgs.linuxPackages.nvidia_x11}/lib
-		  export EXTRA_LDFLAGS="-L/lib -L${pkgs.linuxPackages.nvidia_x11}/lib"
-		  export EXTRA_CCFLAGS="-I/usr/include"
+                  export EXTRA_LDFLAGS="-L/lib -L${pkgs.linuxPackages.nvidia_x11}/lib"
+                  export EXTRA_CCFLAGS="-I/usr/include"
             '';
           };
 in pkgs.stdenv.mkDerivation {
diff --git a/test/makefile b/test/makefile
deleted file mode 100644
index b22b3df..0000000
--- a/test/makefile
+++ /dev/null
@@ -1,25 +0,0 @@
-CC := g++ # This is the main compiler
-# CC := clang --analyze # and comment out the linker last line for sanity
-
-SRCDIR := .
-INCDIR := ../include
-VENDOR := ../extern
-BUILDDIR := ../build
-TARGET := ../bin/tester
- 
-SRCEXT := cpp
-HEADDEREXT := hpp
-SOURCES := $(shell find $(SRCDIR) -type f -name '*.$(SRCEXT)')
-HEADERS := $(shell find $(LIBDIR) -type f -name '*.$(HEADDEREXT)')
-OBJECTS := $(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(SOURCES:.$(SRCEXT)=.o))
-CFLAGS := -std=c++17 -Wall -g -DNVRTC_GET_TYPE_NAME=1
-LIB := -lnvrtc -lcuda -L $(CUDA_PATH)/lib64 -Wl,-rpath,$(CUDA_PATH)/lib64 
-INC := -I $(INCDIR) -I $(CUDA_PATH)/include -I $(VENDOR)/catch2/single_include
-
-# Build
-all: $(OBJECTS)
-
-$(BUILDDIR)/%.o: $(SRCDIR)/%.$(SRCEXT)
-	@echo " $(CC) $(CFLAGS) $(INC) -c -o $@ $<"; $(CC) $(CFLAGS) $(INC) -c -o $@ $<
-
-.PHONY: all
\ No newline at end of file