I want to edit multiple lines in eclipse, but I can\'t find any short cut or Plugin. In Geany I just press ctrl+alt+up/down I can
On OS X, the key combination for multi-line edits in Eclipse (or STS) is option/alt+command+A
You can try the following plugin,
https://github.com/caspark/eclipse-multicursor/releases
With this multiple occurrence of same text can be selected and edited. This is similar to multi select functionality available in editors like Sublime and Visual studio code.
Press alt + shift + A to Toggle block selection (Toggle block / column selection in the current text editor), this will let you write vertically in eclipse, then you can easily do this.
Go to Window->Preferences.
Find for binding in text box surrounded by red box.