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Effective Java ѧϰ±Ê¼Ç (11)

CloneÕâ¸ö·½·¨ºÜ¼¦Àߣ¬Ô­ÒòÊÇÒòΪËüÊÇÊܱ£»¤µÄ(protected)£¬Æä¶þCloneÕâ¸ö·½·¨ÊÇ¿ÉÑ¡µÄ£¬¼´ÓпÉÄÜÀàûÓÐÌṩÕâ¸ö·½·¨¡£
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@Override public Stack clone() {
            try {
                        Stack result = (Stack) super.clone();
                        result.elements = elements.clone();
                        return result;
            } catch (CloneNotSupportedException e) {
                        throw new AssertionError();
            }
}
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public class HashTable implements Cloneable {
            private Entry[] buckets = ...;
            private static class Entry {
                        final Object key;
                     


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