Watched object in debug session cannot be expanded

[PetrMiksik]

Apache NetBeans version

Apache NetBeans 29

What happened

The watched object cannot be expanded in the table, even its type is a list.

Language / Project Type / NetBeans Component

Java application with Ant

How to reproduce

1. Enter the following watch: ManagementFactory.getRuntimeMXBean().getBootClassPath()
2. Change the watched expression to: ManagementFactory.getRuntimeMXBean().getInputArguments()

Even the result is a list, the expansion is not possible. If you enter the second watch directly as a new watch, the expansion is available.

Did this work correctly in an earlier version?

No / Don't know

Operating System

Ubuntu 24.04

JDK

Bundled JDK 25

Apache NetBeans packaging

Community provided installer

Anything else

No response

Are you willing to submit a pull request?

No

[mbien]

hmm. This does seem to work for me. I assume the application is also running on JDK 25?

[mbien]

now i can.

when the type of the watch changes from String to List, it sometimes (?) doesn't show the list view.

started with:

java.lang.management.ManagementFactory.getRuntimeMXBean().getName()

and changed the watch to

java.lang.management.ManagementFactory.getRuntimeMXBean().getInputArguments()

edit. interestingly this does not happen when the List is avoided

java.lang.management.ManagementFactory.getRuntimeMXBean().getInputArguments().toArray()

so this may not only be caused by the fact that the type changes.

[mbien]

workaround: delete watch and add new watch instead of updating it in place.

Evaluate Expression window doesn't seem to have the issue.