java.lang.NullPointerException

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  • How to clone swing components
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    • java.lang.NullPointerException at javax.swing.LayoutComparator.compare(Unknown Source) at java.util.Collections.indexedBinarySearch(Unknown Source) at java.util.Collections.binarySearch(Unknown Source) at javax.swing.SortingFocusTraversalPolicy.getComponentAfter(UnknownSource) at javax.swing.LayoutFocusTraversalPolicy.getComponentAfter(UnknownSource) at java.awt.Component.nextFocusHelper(Unknown Source) at java.awt.Container.nextFocusHelper(Unknown Source) at java.awt.Component.nextFocus(Unknown Source) at java.awt.Component.transferFocus(Unknown Source) at oracle.ewt.lwAWT.LWComponent.processFocusEvent(Unknown Source) at oracle.ewt.lwAWT.AbstractButton.processFocusEvent(Unknown Source) at oracle.ewt.button.PushButton.processFocusEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at oracle.ewt.lwAWT.LWComponent.processEventImpl(Unknown Source) at oracle.ewt.button.PushButton.processEventImpl(Unknown Source) at oracle.ewt.lwAWT.LWComponent.redispatchEvent(Unknown Source) at oracle.ewt.lwAWT.LWComponent.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source)
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