nmatt opened a new issue, #9193:
URL: https://github.com/apache/netbeans/issues/9193
### Apache NetBeans version
Apache NetBeans 28
### What happened
In a new-expression with diamond operator (`<>`) for a generic class, like
`new Example<>`, code completion to select between constructors works before
the diamond operator, but not after it; the popup shows "No suggestions".
Strangely, it does work for classes like ArrayList from the JDK. It does not
work for in-project classes, or for other dependencies, like for example
JAXBElement in javax/jakarta.xml.bind.
### Language / Project Type / NetBeans Component
Java, Editor
### How to reproduce
In a Java project, add the following class:
```java
public class Example<T> {
public Example(T value) { }
public Example(String name, T value) { }
}
```
Anywhere in the project, in an expression/statement context, enter the
partial expression `new Example<>`. Add an import for the class if necessary.
Invoke code completion before the `<>` => the popup shows both constructors,
and `Example<T>` as a third entry.
Invoke code completion after the `<>` => the popup shows "No suggestions".
Add the JAXB API as a dependency and try the same for `new JAXBElement<>` =>
same result.
Do the same for (java.util) `new ArrayList<>` => code completion shows all
three constructors both before and after the diamond operator.
### Did this work correctly in an earlier version?
No / Don't know
### Operating System
Windows
### JDK
JDK 21
### Apache NetBeans packaging
Apache NetBeans binary zip
### Anything else
When adding type parameters, i.e. not using the diamond operator, code
completion does work after type-argument list, as in `new Example<String>`.
### Are you willing to submit a pull request?
No
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