Formatter

In the Java editor press Ctrl+Shift+F on code to format it. If no selection is set then the entire source is formatted otherwise only the selection will be. Some tips for using the formatter are listed in the paragraphs of this chapter.

Note that the Java Formatter preferences are accessible on the Opens the Java Formatter preference page Java Formatter preference page.

Disabling formatter inside sections

You can disable/enable the formatter in one or several sections in the code as shown in the sample below:

Java formatter example. Some code using disabling and enabling tags.

The snippet above use default tag names, but they can be changed on the Off/On tags tab of the Java Formatter preference page.

Wrap outermost method calls

Since version 3.6, the Java formatter now tries to wrap the outermost method calls first to have a better output when wrapping nested method calls.

Here is an example of a formatted code where the formatter has wrapped the line between the arguments of the outermost message call to keep each nested method call on a single line:

Java formatter example. The simple snippet with the formatted nested method calls.

A new preference allows you to disable this strategy, typically if you want to format your code as before, then uncheck the Prefer wrapping outer expressions preference accessible on the Line wrapping tab of the Java Formatter preference page.

Note: Currently the new strategy only applies to nested method calls, but that might be extended to other nested expressions in future versions.

Condense Javadoc and block comments

Users can reduce the number of lines of formatted multi-lines comments as shown in the example below:

Java formatter example. The simple snippet with the block and Javadoc comments formatted with less lines than with the default profile.

To activate this behavior uncheck the /* and */ on separate lines preference accessible on the Comments tab of the Java Formatter preference page.

The same kind of preference is also available for the Javadoc comments.

Preserve user line breaks

Users can preserve line breaks by not joining lines in code or comments.

For example, the already wrapped lines of the return statement in the following test case:

Example of Code to Format

will be preserved by the formatter when the Never join lines preference is used, hence produces the following output when formatted:

Coded Formatted with Never Join Lines

To activate this behavior check the Never join lines preference accessible on the Line Wrapping and the Comments tabs of the Java Formatter preference page.

Related concepts

Java editor
Java development tools (JDT)

Related references

Edit menu
Java editor preferences
Formatter preferences