Eclipse-Juno Undo / Redo Enable?

Question

Quick question, how do I enable Undo / Redo in Eclipse-Juno?

I use:

Eclipse for Mobile Developers Juno Service Release 1 Build id: 20120920-0800 

Even just entering some random text into the editor, Undo / Redo are grayed out, and the keyboard shortcuts do not work. I cannot work without undo / redo. (God knows how many times they pulled my ass out of the fire.)

All I can find to configure cancellation:

Window-> Settings-> General-> Editors-> Text Editors-> Resize History.

This value was 200, I tried to change it to 1000.

I tried google and here in Stack Overflow. There is a similar question, but not to enable undo / redo. It was a clean install of Eclipse.

Is there an inclusion check? Am I missing any place buried in these screens of parameters that I am missing?

I use the Java perspective with a "classic" theme.

My java -version reports

 java version "1.7.0_10" Java(TM) SE Runtime Environment (build 1.7.0_10-b18) Java HotSpot(TM) 64-Bit Server VM (build 23.6-b04, mixed mode) 

What am I missing ???

If there is no solution, and this is a mistake (and this is really bad), can I use my old 3.7 with the above version of Java? I am learning Java, so I can write Android applications, but I have not installed the SDK yet.

Answer 1

First of all, apology, I know that this answer does not answer this original question.

I am writing this here since this question was the third result on Google when I searched for the phrase “Juno eclipse replay shortcut”, so I thought it would be an OK place to answer this question differently.

so if you are looking for a keyboard shortcut for the eclipse Juno redo function:

try ctrl + shift + Z

Answer 2

In the Kepler version, the default shortcut is ctrl + y.
You can change it to ctril + shift + z.
I changed it to ctril + shift + z.

Answer 3

To change the Redo shortcut: Windows → Settings → Keys → Search Repeat

Answer 4

Restarting Eclipse solved this problem for me. Before restarting, Undo and Redo were grayed out, and Ctrl-Z did nothing.