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Product Version = NetBeans IDE 7.4 (Build 201310111528) Operating System = Windows 7 version 6.1 running on x86 Java; VM; Vendor = 1.7.0_45 Runtime = Java HotSpot(TM) Client VM 24.45-b08
Created attachment 148333 [details] IDE log
You should to set the checkbox´s default icon first by selecting a desired image; then set a Selected icon property for the button, or jCheckbox. On this case is jCheckbox using palette tool. On Nimbus LAF is enough to set Selected icon property.
Please clarify what the issue is - provide some sample code and/or screenshots and reopen, thanks.
Created attachment 148429 [details] image on Nimbus and image on Windows LAF
Created attachment 148430 [details] code example
How is this related to NetBeans? I don't see any NetBeans code in the code example.