import java.util.Objects;
import java.util.function.Function;

@FunctionalInterface
interface TriFunction<A, B, C, R> {

    public R apply(A a, B b, C c);

    default <V> TriFunction<A, B, C, V> andThen(Function<? super R, ? extends V> after) {
        Objects.requireNonNull(after);
        return (A a, B b, C c) -> after.apply(apply(a, b, c));
    }
}


when netbeans converts the below lambda

return (A a, B b, C c) -> after.apply(apply(a, b, c));

produces the below anonymous inner class

return new TriFunction<A, B, C, V>() {

            public V apply(A a, B b, C c) {
                return after.apply(apply(a, b, c));
            }
        };

It should actually convert to 

return new TriFunction<A, B, C, V>() {

            public V apply(A a, B b, C c) {
                return after.apply(TriFunction.this.apply(a, b, c));
            }
        };

Intellij IDE converts this properly.