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The Java Developers Almanac 1.4Order this book from Amazon. |
e354. Creating a Set That Retains Order-of-InsertionSet set = new LinkedHashSet(); // Add some elements set.add("1"); set.add("2"); set.add("3"); set.add("2"); // List the elements for (Iterator it=set.iterator(); it.hasNext(); ) { Object o = it.next(); } // [1, 2, 3]
e353. Operating on Sets
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