Using wala to slice the java code.
Before running the code, you should open the com.ibm.wala.core-1.5.3.jar as a compressed package, then open the wala.properties file and modified the java path :
java_runtime_dir = your_java_path
for example:/usr/lib/jvm/jdk1.8.0_101/jre/lib/
Afterwards, you can use the src/slice/SliceMain.java to slice a java code.
Attention: The code you want to slice must be compiled to a jar package.