The ALT +/code hint function fails in the STS (Spring tool Suite)

In Sts/eclipse, Alt +/The role of code hints, sometimes due to shortcut key conflicts and other reasons

Solution:

In Window-> Preferences-> General-> Keys
1, the Word completion shortcut key settings Alt+c
2, the Content Assist shortcut keys to change to alt+/
Click OK

If you are still not prompted correctly, it is possible that the prompt function is turned off:
1. menu window-> Preferences-> Java-> Editor-> Content Assist-> Enable auto activation option tick
2, Menu window-> Preferences-> Java-> Editor-> Content Assist-> Advanced The above tab "Select the proposal kinds Contained in the ' Default ' content assist list to tick the required options, if not sure, you can "default Proposal kinds" Part of the check, click OK