@Target({TYPE,FIELD,METHOD,PARAMETER,CONSTRUCTOR,LOCAL_VARIABLE,MODULE})
@Retention(SOURCE)
public @interface SuppressWarnings

Indicates that the named compiler warnings should be suppressed in the annotated element (and in all program elements contained in the annotated element). Note that the set of warnings suppressed in a given element is a superset of the warnings suppressed in all containing elements. For example, if you annotate a class to suppress one warning and annotate a method to suppress another, both warnings will be suppressed in the method. However, note that if a warning is suppressed in a module-info file, the suppression applies to elements within the file and not to types contained within the module.

As a matter of style, programmers should always use this annotation on the most deeply nested element where it is effective. If you want to suppress a warning in a particular method, you should annotate that method rather than its class.