import java.util.*; class Main { private final Map<Integer, Map<String, String>> myScheduledUpdates = null; void foo() { new Runnable() { @Override public void run() { <selection>myScheduledUpdates.keySet().toArray(new Object[myScheduledUpdates.keySet().size()])</selection>; } }; myScheduledUpdates.keySet().toArray(new Object[myScheduledUpdates.keySet().size()]); } }