Eclipse IDE for Java Developers
Version: 2019-06 (4.12.0)
Build id: 20190614-1200
用alt + / 提示不直接出代码提示,要按很多次
选中菜单 Window -> Preferences
弹出框的菜单树中选择 Java -> Editor -> Content Assist -> Advanced
在右边的内容可中,选中 Select the proposal kinds contained in the 'default' content assist list:下的 Java Proposals(Task-Focused) 复选框