Just now, I was going through Solr code and came upon a snippet of code to iterate over a Map, which I did not know before:
Map<Integer, String> map = new HashMap<Integer, String>();
map.put(1, "one");
map.put(2, "two");
for (Map.Entry<Integer, String> e : map.entrySet()) {
System.out.println(e.getKey()); //prints 2 and 1
System.out.println(e.getValue()); //prints two and one
}
API for the Entry inner class.
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I knew B-)