import com.sun.tools.javac.tree.DocTreeMaker; //导入依赖的package包/类
private void init(Context context) {
    modules = Modules.instance(context);
    attr = Attr.instance(context);
    enter = Enter.instance(context);
    elements = JavacElements.instance(context);
    log = Log.instance(context);
    resolve = Resolve.instance(context);
    treeMaker = TreeMaker.instance(context);
    memberEnter = MemberEnter.instance(context);
    names = Names.instance(context);
    types = Types.instance(context);
    docTreeMaker = DocTreeMaker.instance(context);
    parser = ParserFactory.instance(context);
    syms = Symtab.instance(context);
    fileManager = context.get(JavaFileManager.class);
    JavacTask t = context.get(JavacTask.class);
    if (t instanceof JavacTaskImpl)
        javacTaskImpl = (JavacTaskImpl) t;
}
 

import com.sun.tools.javac.tree.DocTreeMaker; //导入依赖的package包/类
protected TreeFactory(Context context) {
    context.put(contextKey, this);
    model = ASTService.instance(context);
    names = Names.instance(context);
    classReader = ClassReader.instance(context);
    make = com.sun.tools.javac.tree.TreeMaker.instance(context);
    docMake = com.sun.tools.javac.tree.DocTreeMaker.instance(context);
    elements = JavacElements.instance(context);
    types = JavacTypes.instance(context);
    chs = CommentHandlerService.instance(context);
    make.toplevel = null;
}
 

import com.sun.tools.javac.tree.DocTreeMaker; //导入依赖的package包/类
protected ParserFactory(Context context) {
    super();
    context.put(parserFactoryKey, this);
    this.F = TreeMaker.instance(context);
    this.docTreeMaker = DocTreeMaker.instance(context);
    this.log = Log.instance(context);
    this.names = Names.instance(context);
    this.tokens = Tokens.instance(context);
    this.source = Source.instance(context);
    this.options = Options.instance(context);
    this.scannerFactory = ScannerFactory.instance(context);
    this.locale = context.get(Locale.class);
}
 

import com.sun.tools.javac.tree.DocTreeMaker; //导入依赖的package包/类
@Override @DefinedBy(Api.COMPILER_TREE)
public DocTreeMaker getDocTreeFactory() {
    return docTreeMaker;
}