Since Checkstyle 5.3
Checks that the outer type name and the file name match. For example,
the class Foo
must be in a file named
Foo.java
.
To configure the check:
<module name="Checker"> <module name="TreeWalker"> <module name="OuterTypeFilename"/> </module> </module>
Example of class Test in a file named Test.java
public class Test { // OK }
Example of class Foo in a file named Test.java
class Foo { // violation }
Example of interface Foo in a file named Test.java
interface Foo { // violation }
Example of enum Foo in a file named Test.java
enum Foo { // violation }
Example of record Foo in a file named Test.java
record Foo { // violation }
All messages can be customized if the default message doesn't suit you. Please see the documentation to learn how to.
com.puppycrawl.tools.checkstyle.checks