In Eclipse, how do I refresh the icon decorators (per-file 1+ warning, 1+ error) in my Project Explorer?

Question

In Eclipse, in the Project Explorer pane, each Java file will have an icon decorator, indicating whether that file has 1+ compilation errors, or 1+ compilation warnings.

I often find that these icon decorators are out of date with my latest file changes.

How can I force them to be up to date?

I try right-clicking on the project's top-level directory and selecting Refresh, but that doesn't help. Neither does restarting Eclipse.

I realize that one alternative is to use the Markers pane, but that gets me the entire list of all warnings/errors across all files. I'd rather know, see visually, which files have problems and which are clean.

Answer 1

You haven't said which language you are using and whether autobuilds are on or off.

In general, problem markers are only added and removed by your project's builder. If you are using Java, for example, that language has full automatic incremental build support, so the markers update whenever you save a file. Not all languages enjoy this; you may need to explicitly rebuild your project(s) to force an update.

If you believe a marker is out-of-date, or just want to hide it, it's usually safe to delete it from the Markers view; the relevant builder will reinstate it if necessary next time it runs.