Code example for LinkedHashMap

Methods: keySet

	public boolean isEmpty() { 
		return forwards.isEmpty();
	public Set<K> keySet() {
		return forwards.keySet();
	public V put(K arg0, V arg1) {
		V r = forwards.put(arg0, arg1);
		backwards.put(arg1, arg0);
		return r;
	public void putAll(Map< ? extends K, ? extends V> arg0) {
		for (Map.Entry e : arg0.entrySet()) {
			this.put((K) e.getKey(), (V) e.getValue());
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