Multiple cursors is handy for quickly changing multiple places at the same time. Sure, there are other ways of doing it (like using find and replace), but sometimes it is easier to "see" the changes as you are making it. This is how to activate it:
In Intellij Idea
With the mouse:
- Hold down
ALT
+SHIFT
while clicking On the keyboard - Press
ALT
+SHIFT
+INS
to toggle column selection (or Edit -> Column Selection Mode via the menus) - While holding
SHIFT
press arrow keys to select area - Press
ALT
+SHIFT
+INS
to toggle column selection back offVisual Code
With the mouse: - Hold down
ALT
while clicking On the keyboard: - Hold down
ALT
+CTRL
while using the up and down arrow keys to extend the "cursor" vertically - While holding down
SHIFT
, use left and right keys to select the block
Here's an example of using it to populate fields from constructor arguments in Visual Code: