import com.sun.source.util.DocTreePathScanner; //导入依赖的package包/类
private static DocTreePath getChild(@NonNull DocCommentTree t, final int index) {
    final DocTreePath[] result = new DocTreePath[1];

    t.accept(new DocTreePathScanner<DocTreePath, Void>() {
        int count = 0;
        @Override
        public DocTreePath scan(DocTree node, Void p) {
            if(index == count) {
                result[0] = getCurrentPath();
            }
            return null;
        }
    }, null);

    return result[0];
}
 

import com.sun.source.util.DocTreePathScanner; //导入依赖的package包/类
private DocTreePath getTag(final JavadocContext jdctx, final int offset) {
    final DocTreePath[] result = new DocTreePath[1];
    final int normalizedOffset = skipWhitespacesBackwards(jdctx, offset);
    new DocTreePathScanner<Void, Void>() {
        @Override public Void scan(DocTree node, Void p) {
            if (   node != null
                && jdctx.positions.getStartPosition(jdctx.javac.getCompilationUnit(), jdctx.comment, node) <= normalizedOffset
                && jdctx.positions.getEndPosition(jdctx.javac.getCompilationUnit(), jdctx.comment, node) >= normalizedOffset) {
                result[0] = new DocTreePath(getCurrentPath(), node);
                return super.scan(node, p);
            }
            
            return null;
        }
    }.scan(new DocTreePath(jdctx.javadocFor, jdctx.comment), null);
    
    return result[0];
}
 

import com.sun.source.util.DocTreePathScanner; //导入依赖的package包/类
@Override
public Description matchClass(ClassTree tree, final VisitorState state) {
  final DCTree.DCDocComment comment =
      ((JCTree.JCCompilationUnit) state.getPath().getCompilationUnit())
          .docComments.getCommentTree((JCTree) tree);
  if (comment == null) {
    return Description.NO_MATCH;
  }
  final SuggestedFix.Builder fix = SuggestedFix.builder();
  new DocTreePathScanner<Void, Void>() {
    @Override
    public Void visitLink(LinkTree node, Void aVoid) {
      SuggestedFixes.qualifyDocReference(
          fix, new DocTreePath(getCurrentPath(), node.getReference()), state);
      return null;
    }
  }.scan(new DocTreePath(state.getPath(), comment), null);
  if (fix.isEmpty()) {
    return Description.NO_MATCH;
  }
  return describeMatch(tree, fix.build());
}