[I] Code completion for anonymous class construction doesn't use diamond operator in Java 9+ [netbeans]

["nmatt (via GitHub)" <gi...@apache.org>]

nmatt opened a new issue, #9295:
URL: https://github.com/apache/netbeans/issues/9295

   ### Apache NetBeans version
   
   Apache NetBeans 29
   
   ### What happened
   
   Since Java 9, the constructor calls for a parameterized anonymous class can use the diamond operator instead of repeating the type arguments. However, NetBeans code completion still inserts the type arguments.
   
   ### Language / Project Type / NetBeans Component
   
   Java
   
   ### How to reproduce
   
   Example:
   ```java
   abstract class Example<T>
   {
       abstract T foo();
       
       static 
       {
           Example<ThreadLocal<StackTraceElement>> example = new Example
       }
   }
   ```
   Invoking code completion results in unnecessarily repeating the type argument:
   ```java
           Example<ThreadLocal<StackTraceElement>> example = new Example<ThreadLocal<StackTraceElement>>() {
               ...
           };
   ```
   Expected result for source level ≥ 9:
   ```java
           Example<ThreadLocal<StackTraceElement>> example = new Example<>() {
               ...
           };
   ```
   
   
   ### Did this work correctly in an earlier version?
   
   No / Don't know
   
   ### Operating System
   
   Windows
   
   ### JDK
   
   21
   
   ### Apache NetBeans packaging
   
   Apache NetBeans binary zip
   
   ### Anything else
   
   _No response_
   
   ### Are you willing to submit a pull request?
   
   No


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Re: [I] Code completion for anonymous class construction doesn't use diamond operator in Java 9+ [netbeans]

["pedro-w (via GitHub)" <gi...@apache.org>]

pedro-w commented on issue #9295:
URL: https://github.com/apache/netbeans/issues/9295#issuecomment-4735558720

   AFAICS it's the `abstract` that causes it, for example
   ```
   public abstract class Toolkit<T>{
       Toolkit<String> s = new Toolkit |
   }
   ```
   does the same (also NB does not offer to do diamond inference later which it normally would.)
   `public class Toolkit<T>` is OK, `public interface Toolkit<T>` is not.
   


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