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import java.
util.
*;
');
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');
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class RemoveDoubles
{');
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');
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public static void main
(String[] args
) {');
document.write(' List<String> animals =
new ArrayList<String>
();
');
document.write(' animals.
add("Horse");
');
document.write(' animals.
add("Crocodile");
');
document.write(' animals.
add("Cat");
');
document.write(' animals.
add("Hamster");
');
document.write(' animals.
add("Cat");
');
document.write(' animals.
add("Cat");
');
document.write(' animals.
add("Crocodile");
');
document.write(' animals.
add("Mouse");
');
document.write(' animals.
add("Elk");
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System.
out.
println(animals
);
');
document.write(' removeDoubles
(animals
);
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System.
out.
println(animals
);
');
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}');
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');
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public static <E, T
extends List<E>> T removeDoubles
(T list
) {');
document.write(' Iterator<E> it = list.
iterator();
');
document.write(' Set<E> s =
new HashSet<E>
();
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while (it.
hasNext()) {');
document.write(' E elem = it.
next();
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if (!s.
add(elem
)) {');
document.write(' it.
remove();
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}');
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}');
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return list;
');
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}');
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}');
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