In my case
- Settings> Java> Editor> Content Assist> Uncheck "Enable automatic activation"
- Settings> General> Content Assistant> Linking with Ctrl + Space (Set Key Binding) or Option + Space
- enter "on" then Ctrl + Space
Step 3 will show the methods that you can override.
Disabling automatic activation will increase the performance of eclipse, and the content binding key will be much faster and more useful.
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