[jira] [Updated] (NETBEANS-3802) Hint suggests invalid replacement with lambda for implementations of interfaces with only default methods

["Gregory Williams (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NETBEANS-3802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gregory Williams updated NETBEANS-3802:
---------------------------------------
    Affects Version/s: 12.5

> Hint suggests invalid replacement with lambda for implementations of interfaces with only default methods
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: NETBEANS-3802
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-3802
>             Project: NetBeans
>          Issue Type: Bug
>          Components: java - Hints
>    Affects Versions: 11.2, 12.5
>         Environment: JDK 13
>            Reporter: dennis lucero
>            Priority: Minor
>              Labels: hints
>
> {code:java}
>     interface Dog {
>         default void run() {
>         }
>         default void bark() {
>         }
>     }
>     public static void foo() {
>         final Dog dog = new Dog() {
>             @Override
>             public void bark() {
>                 System.out.println("Woof");
>             }
>         };
>     }
> {code}
> For this code NetBeans has a hint stating
> {quote}This anonymous inner class creation can be turned into a lambda expression.
> {quote}
> in the line with {{new Dog()}}. Replacing the code using the hint results in
> {code:java}
> final Dog dog = () -> {
>     System.out.println("Woof");
> };
> {code}
> which is invalid code
> {quote}incompatible types: Dog is not a functional interface
> no abstract method found in interface Dog
> {quote}
> (Real world example: http://jdbi.org/apidocs/org/jdbi/v3/core/statement/SqlLogger.html This style of interfaces would also be a nice alternative to Swing’s {{*Listener}}/{{*Adapter}} pairs.)



--
This message was sent by Atlassian Jira
(v8.20.1#820001)

---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@netbeans.apache.org
For additional commands, e-mail: commits-help@netbeans.apache.org

For further information about the NetBeans mailing lists, visit:
https://cwiki.apache.org/confluence/display/NETBEANS/Mailing+lists