Commit fffa693

1. all Overridden methods must have an `@Override` annotation

- https://github.com/mcandre/linters#java

[javac](http://www.oracle.com/technetwork/java/javase/downloads/index.html) offers a `-Xlint` option to print additional warnings. The [maven-compiler-plugin](https://maven.apache.org/plugins/maven-compiler-plugin/compile-mojo.html) can be configured to automatically pass `-Xlint` to the underlying Java compiler every time a project is built.

In Java 8, javac will feature an `-Xdoclint` option to identify undocumented code.

[CheckStyle](http://checkstyle.sourceforge.net/), with decent CLI support, as well as decent Maven support, through [maven-checkstyle-plugin](http://maven.apache.org/plugins/maven-checkstyle-plugin/). Checkstyle also supports identifying undocumented code, through its [JavaDoc](http://checkstyle.sourceforge.net/config_javadoc.html) settings.

[FindBugs](http://findbugs.sourceforge.net/) is an old Java linter, but has kept up with Java advances (for example, by offering a standard Gradle plugin).

[PMD](http://pmd.sourceforge.net/) detects flaws and duplicated code.

[Error-prone](https://github.com/google/error-prone) catches common Java mistakes as compile-time errors.

[Android lint](http://tools.android.com/tips/lint) checks Android source files for potential bugs and optimization improvements for correctness, security, performance, usability, accessibility, and internationalization.

[Infer](http://fbinfer.com/) is a static program analyzer for Java, C, and Objective-C, written in OCaml.

- jlint

http://artho.com/jlint/

- https://atom.io/packages/linter-javac