Support type annotations - JSR 308.

[bangarharshit]

Java 8 has type annotations so it can be used to infer type parameters inside collections.

@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
public @interface NotNull {
}

public class Java8Annotations {
  static Map<String, @NotNull String> map;
  public static void main(String[] args) {
  }
}

Unfortunately, it is not backported in android (min sdk=26, not sure if the app will crash for compile-time annotation).

One workaround is to use checker framework compiler - https://checkerframework.org/jsr308/ and use something like.

static Map<String, /*@NotNull*/ String> map;

It brings an extra dependency though.