$ copy-file changes/Anon.java src/main/java/Anon.java
[success]

> compile
[success]

$ exists target/classes/Anon.class target/classes/Anon$1.class
[success]

$ delete src/main/java/Anon.java
[success]

> compile
[success]

$ absent target/classes/Anon.class target/classes/Anon$1.class
[success]