Start jaccessinspector from JRE/JDK bin directory
Start SwingSet2
Click on text field
Click on second button (button demo)
Wait
Get exception

Exception in thread "Thread-2" java.lang.RuntimeException: java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
        at com.sun.java.accessibility.internal.AccessBridge$InvocationUtils.invo
keAndWait(AccessBridge.java:7100)
        at com.sun.java.accessibility.internal.AccessBridge$InvocationUtils.invo
keAndWait(AccessBridge.java:7075)
        at com.sun.java.accessibility.internal.AccessBridge.getCaretLocation(Acc
essBridge.java:1746)
        at com.sun.java.accessibility.internal.AccessBridge.getCaretLocationX(Ac
cessBridge.java:1778)
        at com.sun.java.accessibility.internal.AccessBridge.runDLL(Native Method)
        at com.sun.java.accessibility.internal.AccessBridge.access$300(AccessBri
dge.java:57)
        at com.sun.java.accessibility.internal.AccessBridge$dllRunner.run(Access
Bridge.java:176)
        at java.lang.Thread.run(Thread.java:747)
Caused by: java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
        at java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2080)
        at java.awt.Component.getLocationOnScreen(Component.java:2054)
        at com.sun.java.accessibility.internal.AccessBridge$76.call(AccessBridge
.java:1762)
        at com.sun.java.accessibility.internal.AccessBridge$76.call(AccessBridge
.java:1746)
        at com.sun.java.accessibility.internal.AccessBridge$InvocationUtils$Call
ableWrapper.run(AccessBridge.java:7156)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:303)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:759)
        at java.awt.EventQueue.access$500(EventQueue.java:97)
        at java.awt.EventQueue$3.run(EventQueue.java:712)
        at java.awt.EventQueue$3.run(EventQueue.java:706)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:77)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:729)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:192)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:117)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:106)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:102)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:94)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:83)