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Map map = new HashMap();
Iterator iter = map.entrySet().iterator();
while (iter.hasNext()) {
    Map.Entry entry = (Map.Entry) iter.next();
    Object key = entry.getKey();
    Object val = entry.getValue();
}
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Map map = new HashMap();
Iterator iter = map.keySet().iterator();
while (iter.hasNext()) {
    Object key = iter.next();
    Object val = map.get(key);
}
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