Made a custom COMBOBOX
And then as a series of a CELL EDITOR is set to

When using the EDITOR to the abnormal
Ava. Awt. IllegalComponentStateException: component must be showing on the screen to determine its location

How to solve?

CodePudding user response:

See the error message, it should be to set to this control to create visual, namely setVusible (true)

CodePudding user response:

Maybe you can take a look at this, perhaps, have the solution you need
https://stackoverflow.com/questions/18968815/jcombobox-as-cell-editor-java-awt-illegalcomponentstateexception-component-must

CodePudding user response:

Try using the
SetVisible (true)