Bug 129599

update issue type

Again, please add more details about the functionality that you are requesting. Thanks

Okay, 

In Tools - Options - Java Code - Formatting - Blank Lines :
We can't configure the number of blank lines before or after comments.

Today, if I want add an comment before a method with one blank line beetwen them, when I launch the format action, the
blank line disapears.

I generally use comments in class for visualy seperate the different part of code.  

However, there will be a difference beetwen comment block and javadoc block.

I can say a little more about how I think it should work.  First, Eclipse has had the ability to format comments since 
at least 2003. That said, I never liked how it worked in Eclipse -- my comments never wound up formatted as I would 
have liked.

If I have a single line comment like this:

   // this is a really, really long single line comment that extends past the 80 character vertical line in the editor

it should be reformatted as:

   // this is a really, really long single line comment that extends past the 80 
   // character vertical line in the editor

because "80" fits within the 80-character vertical line, while the word "character" does not.  The right margin can be 
changed to something other than 80 characters (Tools->Options->Editor->Indentation->Right Margin), so it should break 
long comments at whatever it's actually set to.  I am just using the default value of 80 here as an example.

Here is an example for "slash star" style comments:

    /* This
 * is a very poorly formatted comment.  Some lines are really, really long while others
      * are not
   */

It should be reformatted like:

    /* This is a very poorly formatted comment.  Some lines are really, really long 
     * while others are not
     */

Javadoc comments should be handled in a similar way, although my preference would be that the slash and double star be 
on a line all by itself.  Here's a javadoc comment before reformatting:

    /** This is a very poorly formatted javadoc comment.  Some lines are really, really long 
     * while 
     * others are not.
     *@param foo the blah blah blah
     *@throws IllegalStateException if
     *  something bad happens this exception will
     * be thrown
     */

and afterwards:

      /**
       * This is a very poorly formatted javadoc comment. Some lines are really,
       * really long while others are not.
       * 
       * @param foo
       *            the blah blah blah
       * @throws IllegalStateException
       *            if something bad happens this exception will be thrown
       */

Since some will not like their comments reformatted, there should be an option to turn this feature off.  

I have the same issue, I have code like this:
int g=0; // test
int h=1; //test

and when I hit alt+shift+f it formats it to look like this:
int g=0; // test

int h=1; //test

I would really like to turn off the addition of line breaks after the // comments

sgano: this is filed as separated issue 131954 and should be fixed now, the fix will be included in patch1