Description

Checks that the order of modifiers conforms to the suggestions in the Java Language specification, § 8.1.1, 8.3.1, 8.4.3 and 9.4. The correct order is:

1. public
2. protected
3. private
4. abstract
5. default
6. static
7. sealed
8. non-sealed
9. final
10. transient
11. volatile
12. synchronized
13. native
14. strictfp

In additional, modifiers are checked to ensure all annotations are declared before all other modifiers.

Rationale: Code is easier to read if everybody follows a standard.

ATTENTION: We skip type annotations from validation.

Examples

To configure the check:

<module name="Checker">
  <module name="TreeWalker">
    <module name="ModifierOrder"/>
  </module>
</module>
        

Example of Usage

• Google Style
• Sun Style
• Checkstyle Style

Violation Messages

• annotation.order
• mod.order

All messages can be customized if the default message doesn't suit you. Please see the documentation to learn how to.

Package

com.puppycrawl.tools.checkstyle.checks.modifier

Parent Module

TreeWalker