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Tip: How to Convert a List into a Set and Vice Versa

See how to easily convert a list into a set, and a set into a list.


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Converting List to Set:

List list = Arrays.asList(1, 2, 3);
Set set = new HashSet(list);

Converting Set to List:

Set set = Sets.newHashSet(1, 2, 3);
List list = new ArrayList(set);

 

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Octavia Andreea Anghel is a senior PHP developer currently working as a primary trainer for programming teams that participate at national and international software-development contests. She consults on developing educational projects at a national level. She is a coauthor of the book "XML Technologies--XML in Java" (Albastra, ISBN 978-973-650-210-1), for which she wrote the XML portions. In addition to PHP and XML, she's interested in software architecture, web services, UML, and high-performance unit tests.
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