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Steps to reproduce: Perform application Memory profiling Take Heap Dump In Summary view I can't expand Show System property internal link to see its content
The whole contents of the Summary view of heapwalker is rendered in HTML displayer (JEditorPane using HTMLEditorKit), in fact it's a kind of HTML report. Keyboard access to rendered links should be implemented in the HTML displayer (Swing component). Closing as WONTFIX, you should consider finding/filing appropriate bug in JDK/Swing.