Prevent linebreaks with eclipse code formatter

Question

I use the Eclipse formatter with the option on save enabled.

Right now code like this:

 int sum = widgets.stream()
                  .filter(b -> b.getColor() == RED)
                  .mapToInt(b -> b.getWeight())
                  .sum();

will be formatted to:

 int sum = widgets.stream().filter(b -> b.getColor() == RED).mapToInt(b -> b.getWeight())
                  .sum();

is there a setting which will do automated linebreak for everything but cascading function calls?

Answer 1

Steps to format cascading function calls:

1. Window => Preferences => Java => Code Style => Formatter

2. Click Edit.

3. Expand Line Wrapping => Wrapping Settings => Function Calls

4. Change Qualified invocations to Wrap all elements, except first element if not necessary .

• Additionally, ensure Force split, even if line shorter than maximum line width is toggled on .

See image below for what it looks like when set correctly:

5. Change Profile Name if necessary.

6. Apply and close.

Answer 2

For the general case, add comments:

int sum = widgets.stream() //
     .filter(b -> b.getColor() == RED) //
     .mapToInt(b -> b.getWeight()) //
     .sum();

This works for any kind of code, especially large strings:

String str = "some long text" //
    + "some more text" //
    + "still more";