javac -classpath java/src:D:/jruby-9.4.1.0/lib/jruby.jar -source 1.6 -target 1.6 java/src/json/ext/ByteListTranscoder.java
warning: [options] bootstrap class path not set in conjunction with -source 1.6
java\src\json\ext\ByteListTranscoder.java:8: error: package org.jruby.exceptions does not exist
import org.jruby.exceptions.RaiseException;
                           ^
java\src\json\ext\ByteListTranscoder.java:9: error: package org.jruby.runtime does not exist
import org.jruby.runtime.ThreadContext;
                        ^
java\src\json\ext\ByteListTranscoder.java:10: error: package org.jruby.util does not exist
import org.jruby.util.ByteList;
                     ^
...