Ctrl+space is not working in Spring Tool suite

Question

Ctrl + Space is not working in Spring tool suite 3.7.3 but it was working not sure what went wrong, Could anyone please guide me to get work that.

When i try to do that i am getting Error message says"No Completions Available"

Tried this below solution still its not working Configure Eclipse’s content assist, go “Preferences>Java>Editor>Content Assist>Advanced“. Make sure “Other Java Proposals” is ticked

Answer 1

尝试从帮助更新 STS -> 检查更新。 enter image description here 等待更新完成。您可以在进度视图（窗口->显示视图->进度）中检查更新进度 更新完成后重新启动 STS。 如果 Java 版本更新需要更改 SpringToolSuite4.ini 文件如下 enter image description here

经过上述更改后，ctrl+space 在 application.properties 文件中工作。