Set the Eclipse Code auto-complete feature

1. Select the Preferences item under the Windows menu in the Eclipse menu bar

2. Find "Content Assist", "Java", "editor", on the Left

3. Under the "Auto Activation" item on the right, find "auto Activation triggers for Java:" (you can see that the default in the Settings box is only ".", which is why the default is only "." To trigger an auto-complete window)

4. At the midpoint of the box "." Then enter the letter you want to trigger the auto-completion (the middle does not need to be separated, you can type it next to each other), such as: "Abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz.", Typing any uppercase and lowercase letters when you write the code will trigger an auto-fill window Popup

5. Confirm OK when you are finished typing.

Set the Eclipse Code auto-complete feature