Found some of Eclipse's common shortcut keys on the Internet, paste it here for reference.
Ctrl+d: Delete When moving forward
Ctrl+o: Show outline
Ctrl+alt+↓ Copy the current row to the next row (replication incremented)
Ctrl+alt+↑ Copy the current line to the previous row (replication incremented)
Alt+↓ the current line and the next line of interaction (especially useful, can be omitted first cut, then pasted)
Alt+↑ the current line and the upper row interaction position (IBID.)
alt+← the previous edited page
alt+→ next Edit page (of course, for the above article)
Shift+enter inserts a blank row on the next line of the current row (at which point the mouse can be at any position in the current row, not necessarily the last)
Shift+ctrl+enter Insert blank line in current line (principle above)
ctrl+/comment on the current line, and then uncomment it
Ctrl+shift+x turns the currently selected text to lowercase
Ctrl+shift+y turns the currently selected text to lowercase
Ctrl+shift+f formatting of the current code
Ctrl + Shift + T find Java class files
Common shortcut keys in eclipse