In Eclipse 2019-12 (4.14.0), plugin development was carried out and an IMarker type was customized, defined as follows (plugin.xml):
<extension
id="my.markerType"
name="My Marker"
point="org.eclipse.core.resources.markers">
<persistent
value="true">
</persistent>
<super
type="org.eclipse.core.resources.problemmarker">
</super>
</extension>
How to customize the display content for mouse hover，
I hope to implement a Java error prompt similar function when editing txt text, display error messages, and provide code completion suggestions。