Description

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>
        

Code:

public class Example1 {
  public static final int MAX_VALUE = 100;

  // violation below "'private' modifier out of order with the JLS suggestions"
  final private String example = "Example";

  //violation below, 'annotation modifier does not precede non-annotation modifiers'
  public @Deprecated class Example {}
}
        

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