Completion can be triggered by user request or can be automatically
 triggered when the "(" or "." character is typed:

public char[] getCompletionProposalAutoActivationCharacters() {
    return new char[] { '.','(' };
}

由于看起来这些字符是硬编码的,因此您需要实现自己的内容辅助.也许只用这一种方法覆盖现有的简单派生就足够了吗？