Eclipse comment/uncomment shortcut?

Question

I thought this would be easy to achieve, but so far I haven't found solutions for comment/uncomment shortcut on both Java class editor and jsf faceted webapp XHTML file editor :

1. to quickly comment/uncomment a line (like ctrl + d is for removing single line)
2. being able to choose multiple lines and comment/uncomment it

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For example :

single line java code, from :

private String name;

into

//private String name;

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multiple line java code, from :

private String name;
private int age;

into

/*private String name;
private int age;*/

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single line xhtml code, from :

<h:inputText ... />

into

<!-- h:inputText ... / -->

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multiple line xhtml code, from :

<h:inputTextarea
  rows="xx"
  cols="yy"
  ...
/>

into

<!-- h:inputTextarea
  rows="xx"
  cols="yy"
  ...
/ -->

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Answer 1

1. Single line comment Ctrl + /
2. Single line uncomment Ctrl + /

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3. Multiline comment Ctrl + Shift + /
4. Multiline uncomment Ctrl + Shift + \ (note the backslash)

Answer 2

For single line comment you can use Ctrl + / and for multiple line comment you can use Ctrl + Shift + / after selecting the lines you want to comment in java editor.

On Mac/OS X you can use ⌘ + / to comment out single lines or selected blocks.

Answer 3

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Comments In Java class

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1. Toggle/Single line Comment ( Ctrl+/ ) - Add/remove line comments (//…) from the current line.
2. Add Block Comment ( Ctrl+Shift+/ ) - Wrap the selected lines in a block comment (/*… */).
3. Remove Block Comment ( Ctrl+Shift+/ ) - Remove a block comment (/*… */) surrounding the selected lines.
4. Add Javadoc Comment ( Alt+Shift+J ) - Add a Javadoc comment to the active field/method/class. See the notes below for more details on where to position the cursor.

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Comments In HTML/XML/Config file

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1. Add Block Comment ( Ctrl+Shift+/ ) - Wrap the selected lines in a block comment (< !-- -->).
2. Remove Block Comment (Ctrl+Shift+\) - Remove a block comment (< !-- -->) surrounding the selected lines.

Answer 4

Ctrl + 7 to comment a selected text.