features-extract-error

[sincerity-being]

javac -cp extractor/target/features-javac-extractor-1.0.0-SNAPSHOT-jar-with-dependencies.jar -Xplugin:FeaturePlugin
QueueDrainObserver.java:2: 错误: 找不到符号
protected final void fastPathOrderedEmit(U value, boolean delayError, Disposable disposable) {
^
符号: 类 U
位置: 类 QueueDrainObserver
QueueDrainObserver.java:2: 错误: 找不到符号
protected final void fastPathOrderedEmit(U value, boolean delayError, Disposable disposable) {
^
符号: 类 Disposable
位置: 类 QueueDrainObserver
QueueDrainObserver.java:3: 错误: 找不到符号
final Observer<? super V> observer = downstream;
^
符号: 类 Observer
位置: 类 QueueDrainObserver
QueueDrainObserver.java:3: 错误: 找不到符号
final Observer<? super V> observer = downstream;
^
符号: 类 V
位置: 类 QueueDrainObserver
QueueDrainObserver.java:3: 错误: 找不到符号
final Observer<? super V> observer = downstream;
^
符号: 变量 downstream
位置: 类 QueueDrainObserver
QueueDrainObserver.java:4: 错误: 找不到符号
final SimplePlainQueue q = queue;
^
符号: 类 SimplePlainQueue
位置: 类 QueueDrainObserver
QueueDrainObserver.java:4: 错误: 找不到符号
final SimplePlainQueue q = queue;
^
符号: 类 U
位置: 类 QueueDrainObserver
QueueDrainObserver.java:4: 错误: 找不到符号
final SimplePlainQueue q = queue;
^
符号: 变量 queue
位置: 类 QueueDrainObserver
QueueDrainObserver.java:6: 错误: 找不到符号
if (wip.get() == 0 && wip.compareAndSet(0, 1)) {
^
符号: 变量 wip
位置: 类 QueueDrainObserver
QueueDrainObserver.java:6: 错误: 找不到符号
if (wip.get() == 0 && wip.compareAndSet(0, 1)) {
^
符号: 变量 wip
位置: 类 QueueDrainObserver
QueueDrainObserver.java:9: 错误: 找不到符号
if (leave(-1) == 0) {
^
符号: 方法 leave(int)
位置: 类 QueueDrainObserver
QueueDrainObserver.java:17: 错误: 找不到符号
if (!enter()) {
^
符号: 方法 enter()
位置: 类 QueueDrainObserver
QueueDrainObserver.java:21: 错误: 找不到符号
QueueDrainHelper.drainLoop(q, observer, delayError, disposable, this);
^
符号: 变量 QueueDrainHelper
位置: 类 QueueDrainObserver
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.google.protobuf.UnsafeUtil (file:/D:/code/paper_impl_and_git_code/myself/pyBKT/hey/ast_deal/features-javac/extractor/target/features-javac-extractor-1.0.0-SNAPSHOT-jar-with-dependencies.jar) to field java.nio.Buffer.address
WARNING: Please consider reporting this to the maintainers of com.google.protobuf.UnsafeUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Feature extraction failed: QueueDrainObserver.java

May I be able to extract such a Java file with only a class name and one method, while not importing any packages, but the method references a certain class.